KR101841649B1 - Method and apparatus for analyzinnuclide - Google Patents

Abstract

According to one embodiment of the present invention, disclosed is a method for analyzing nuclides by using a first detector, measuring beta ray energy and gamma ray energy at the same time, and a second detector, measuring the beta ray energy. According to the present invention, the method comprises: a step of calculating a first measurement result of counting a detecting number of beta rays and gamma rays during predetermined time for each beta ray energy and gamma ray energy measured by the first detector; a step of calculating a second measurement result of counting a detecting number of beta rays during the predetermined time for each beta ray energy measured by the second detector; a step of calculating a third measurement result of counting a detecting number of gamma rays during predetermined time for each gamma ray energy by subtracting the second measurement result from the first measurement result; and a step of determining emitted nuclides from the beta rays and from the gamma rays from the third measurement result by referencing a library including information on radiation energy for each nuclide.

Description

[0001] METHOD AND APPARATUS FOR ANALYZINNUCLIDE [0002]

The present invention relates to a method and an apparatus for analyzing nuclides, and more particularly, it relates to a method and apparatus for analyzing a nuclide, and more particularly, And more particularly, to a method and apparatus for analyzing nuclides.

Nucleotides that emit radiation include nuclides that release both beta and gamma rays (hereinafter, "beta rays and gamma ray emitting nuclides") and nuclides that emit only beta rays (hereinafter, "pure beta ray emitting nuclides"). However, current radiation detectors can not measure only gamma rays purely, and it is difficult to distinguish between beta-ray and gamma ray emitting nuclides and pure beta ray emitting nuclides.

Therefore, the analysis of existing radionuclides was mostly based on laboratory analysis after collecting samples. In the laboratory, beta-ray and gamma-ray emitting nuclides are analyzed mainly by using high purity germanium (HPGe) detector, and pure beta emission nuclides are subjected to physical and chemical pretreatment to single-nucleate the samples and then to liquid scintillation counter (LSC).

However, this method has a long time to reach the laboratory after collecting the sample. Especially, in the case of collecting the sample for measuring the depth distribution, there is a high possibility that the sample may be disturbed during the collecting process. In addition, the pure beta-emitting nuclides have a disadvantage in that the physical and chemical pretreatment process is very complicated and takes a long time.

A problem to be solved in the embodiment of the present invention is to provide a technique for solving the problem that it is difficult to distinguish the beta ray and the gamma ray emitting nuclide and the pure beta ray emitting nuclide because the radiation detector can not measure pure gamma ray only.

In addition, we can not directly analyze the nuclides in the field, and it is necessary to provide time-consuming problems as the samples are sampled and analyzed in the laboratory, and techniques for solving the problem of the analysis errors due to disturbance of the sample during the sampling process.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

A method for analyzing a nuclide using a first detector for simultaneously measuring energy of a beta ray and a gamma ray and a second detector for measuring energy of a beta ray according to an embodiment of the present invention is characterized in that the energy of the beta ray and gamma ray measured by the first detector Calculating a first measurement result obtained by counting the number of times of detection of the beta rays and the gamma rays for a predetermined time, counting the number of times of detection of the beta rays for the predetermined period of time by the energy of the beta rays measured by the second detector Obtaining a third measurement result obtained by subtracting the second measurement result from the first measurement result and counting the number of times of detection of the gamma ray for the predetermined time for each energy of the gamma ray; , A library containing nuclear type emission radiation energy information, and from the third measurement result, And a step of determining a line-emitting nuclide.

Measuring the number of times of detection of the gamma ray for each energy of the gamma ray according to the positions of the first detector and the second detector to determine the distribution amount of the beta ray and the gamma ray emission nuclide according to the position have.

The fourth measurement result is obtained by subtracting the number of times of detection of the betaine by the betaine and the gamma ray emitting nuclide from the second measurement result based on the released ratio of the betaine to the gamma ray of the betaine and the gamma ray emitting nuclide derived from the library And discriminating the pure beta-emitting nuclides from the fourth measurement result by referring to the library.

Determining the number of times the beta rays are sensed for the energy of the beta ray according to the positions of the first detector and the second detector and discriminating the distribution amount of the pure beta rays emission nuclides according to the position .

The apparatus for analyzing nuclides according to an embodiment of the present invention includes a first detector for simultaneously measuring energy of a beta ray and a gamma ray, a second detector for measuring only a beta ray, and a second detector for detecting a beta ray and a gamma ray, A second measurement result obtained by counting the number of sensed times of the beta rays and the gamma rays during the predetermined time for each energy of the beta rays measured by the second detector, And a third measurement result obtained by subtracting the second measurement result from the first measurement result by counting the number of times of detection of the gamma ray for the predetermined time by the energy of the gamma ray, with reference to a library including nuclear kind radiation energy information And a controller for discriminating the beta rays and the gamma ray emitting nuclides from the gamma ray emitting nuclides.

At this time, the controller may measure the number of times of detection of the gamma ray by the energy of the gamma ray according to the positions of the first detector and the second detector, and determine the distribution amount of the beta ray and the gamma ray emitting nuclide according to the position.

The control unit may further include a fourth measurement obtained by subtracting the number of times of detection of the betaine by the beta rays and the gamma ray emitting nuclides from the second measurement result based on the beta rays emission ratio of the beta rays and the gamma ray emitting nuclides derived from the library to the gamma rays. And the pure beta ray emitting nuclide can be derived from the fourth measurement result through the library.

At this time, the controller may determine the number of sensing of the beta rays according to the energy of the beta ray, according to the positions of the first detector and the second detector, and determine the distribution amount of the pure beta rays emission nuclides according to the positions.

According to the embodiment of the present invention, it is possible to separate and discriminate the beta-ray and gamma-ray emitting nuclides and the pure beta ray emitting nuclide without pretreatment in the field, and further, the distribution amount of nuclides according to the depth can be analyzed.

1 is a functional block diagram of a nuclide analysis apparatus according to an embodiment.
2 is an exemplary diagram for explaining the configuration of a first detector or a second detector according to an embodiment.
3 is a graph showing a voltage signal according to radiation measured by the first detector or the second detector for a predetermined time.
FIG. 4 is a flowchart illustrating a nuclide analysis method according to an embodiment.
FIG. 5 is a graph illustrating a first measurement result of counting the number of times of detection of the beta rays and the gamma rays by the energy of the beta rays and the gamma rays measured by the first detector.
FIG. 6 is a graph illustrating a second measurement result in which the number of times of detection of the beta rays is counted for each energy of the beta ray according to the result measured by the second detector.
FIG. 7 is a graph for explaining a third measurement result in which the number of detection of gamma rays is counted for a predetermined time by energy of a gamma ray by subtracting a second measurement result from the first measurement result.
8 is a view for explaining the fourth measurement result obtained by subtracting the number of times of detection of the betaine by the beta ray and the gamma ray emitting nuclide in the second measurement result based on the beta ray emission rate of the gamma ray emitting nuclide derived from the library .

DETAILED DESCRIPTION OF THE EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

The embodiments disclosed herein should not be construed or interpreted as limiting the scope of the present invention. It will be apparent to those of ordinary skill in the art that the description including the embodiments of the present specification has various applications. Accordingly, any embodiment described in the Detailed Description of the Invention is illustrative for a better understanding of the invention and is not intended to limit the scope of the invention to embodiments.

The functional blocks shown in the drawings and described below are merely examples of possible implementations. In other implementations, other functional blocks may be used without departing from the spirit and scope of the following detailed description. Also, although one or more functional blocks of the present invention are represented as discrete blocks, one or more of the functional blocks of the present invention may be a combination of various hardware and software configurations that perform the same function.

In addition, the expression "including any element" is merely an expression of an open-ended expression, and is not to be construed as excluding the additional elements.

Further, when a component is referred to as being connected or connected to another component, it may be directly connected or connected to the other component, but it should be understood that there may be other components in between.

Also, the expressions such as 'first, second', etc. are used only to distinguish a plurality of configurations, and do not limit the order or other features between configurations.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram of a nuclide analysis apparatus 100 according to an embodiment.

Referring to FIG. 1, the apparatus 100 for analyzing nuclides according to one embodiment includes a first detector 110, a second detector 120, a counting unit 130, and a control unit 140.

The first detector 110 simultaneously measures the energy of the beta rays and the gamma rays, and the second detector 120 measures only the energy of the beta rays. Referring to FIG. 2, the first detector 110 and the second detector 120 may include a scintillator A, a photoreceptor B, and a photomultiplier C. In FIG.

The scintillator (A) receives radiation emitted from the nucleus paper and emits an optical signal, for example, can emit an optical signal in the visible light region. At this time, the radiation includes a beta ray and a gamma ray.

On the other hand, in an environment in which a beta ray and a gamma ray are mixed, the first detector 110 receives both a beta ray and a gamma ray and emits an optical signal, and the second detector 120 receives a beta ray signal, The scintillator A having different sensitivities can be used.

For example, the scintillator A of the first detector 110 uses the inorganic scintillator A having a relatively higher density (> 4.0 g / cm3) than the scintillator A of the second detector 120, The scintillator A of the second detector 120 uses the plastic scintillator A having a small density (1.1 ± 0.2 g / cm 3) so that the scintillator A of the first detector 110 receives both the beta rays and the gamma rays And the scintillator A of the second detector 120 can accept only the beta ray.

The collimator may be coupled to the upper surface and the lower surface of the scintillator A so that the first detector 110 and the second detector 120 have a resolution according to depth in the soil. Since the surface to which the collimator is coupled can not transmit the radiation, the scintillator A can receive radiation from the horizontal direction excluding the upper surface and the lower surface. Therefore, since the scintillator A receives only the radiation emitted in the horizontal direction of the depth penetrated into the soil, it can have a resolution depending on the depth. As a component of the collimator, for example, lead or tungsten having a high density and a low transmittance of radiation can be used.

The photoreceptor (B) allows the optical signal generated by the beta rays or the gamma rays received by the scintillator (A) to reach the photomultiplier tube (C).

The opto-electronic amplifying tube C can convert and amplify the optical signal transmitted through the light-receiving body B into an electric signal, and convert the electric signal into a voltage signal through the preamplifier. At this time, the converted voltage signal can be converted into a graph form through a multi-peak analyzer.

3 is a graph showing a voltage signal according to radiation measured by the first detector 110 or the second detector 120 for a predetermined time.

Referring to FIG. 3, the photomultiplier (C) may convert an optical signal measured over time into a voltage signal. In this case, the energy of the beta ray or gamma ray diffused depending on the radionuclide is different, appear.

In this way, the first detector 110 and the second detector 120 can be inserted into the soil at predetermined depths to record a voltage signal, thereby collecting the radiation data by depth in the soil.

Since the first detector 110 receives both the beta rays and the gamma rays without discriminating them and generates a voltage signal, the first graph obtained through the first detector 110 shows the energy and the radiation of the radiation without separating the beta ray and the gamma ray. The number of times is measured at once. In this case, the first graph shows the voltage signals of the beta rays and the gamma rays emitted by the nuclides simultaneously emitting the beta rays and the gamma rays (hereinafter, referred to as 'beta rays and gamma ray emitting nuclides') and the nuclides emitting only the pure beta rays The measured radiation can not be distinguished from the beta ray or the gamma ray because the radiation measured by the information of the first graph alone can not be distinguished from the beta ray or the gamma ray. It is not possible to distinguish between emitted radiation and pure beta radiation.

Also, since the second detector 120 receives only the beta rays, the second graph obtained through the second detector 120 measures the energy of the beta ray and the number of times of detection. At this time, the second graph shows mixed results of the beta rays emitted by the beta rays and the gamma ray emitting nuclides and the beta rays emitted by the pure beta ray emitting radionuclides. Therefore, it is not possible to distinguish whether the beta line measured by the information in the second graph is the beta line emitted from the beta ray and the gamma ray emitting nucleus, or the beta ray emitted from the pure beta ray emitting nucleus.

Considering the difference that the voltage signals due to the beta ray and the gamma ray are present in the first graph but the voltage signals due to the gamma ray are not present in the second graph, the difference in the number of times of detection of radiation in the first graph and the second graph , The number of times the gamma ray is detected can be obtained.

At this time, since there is no nuclide that emits only gamma rays purely, the number of times the gamma ray was detected is due to gamma rays emitted from the beta rays and gamma ray emitting nuclei.

According to the above concept, the counting unit 130 may include a first measurement result obtained by counting the number of times of detection of the betaine and gamma rays for a predetermined time by the energy of the betaine and the gamma ray measured by the first detector 110, The second measurement result may be obtained by counting the number of times of detection of the beta ray for a predetermined period of time according to the energy of the beta ray measured at the first time.

The controller 140 refers to the library containing the nuclear type radiation energy information, subtracts the second measurement result from the first measurement result, and determines from the third measurement result that the number of times of detection of the gamma ray is counted for each energy of the gamma ray for a predetermined time Beta-ray and gamma-emitting radionuclides.

The control unit 140 also determines the number of beta rays and gamma ray emitting nuclides according to the depth from the third measurement result including the number of times of detection of the gamma rays by the energy of the gamma rays according to the depths of the first detector 110 and the second detector 120 The amount of distribution can be determined.

The library stores nuclear type radiation energy information. For example, it stores information as to what kind of radiation the nucleus emits and which intensity is measured as a voltage signal when the radiation is received by the scintillator (A). The library may be in the form of a memory included in the nuclide analysis apparatus 100 or may be a database server outside the nuclide analysis apparatus 100 and may exchange information with the nuclide analysis apparatus 100 through a communication network.

In addition, the control unit 140 obtains a fourth measurement result obtained by subtracting the number of times of detection of the betaine by the beta rays and the gamma ray emitting nuclides from the second measurement result, based on the beta ray emission rate of the gamma ray radionuclides derived from the library From the results of the fourth measurement, pure beta-emitting nuclides can be derived from the library.

The control unit 140 also calculates the distribution of the pure beta emission nuclides according to the depth from the fourth measurement result including the information on the number of times of detection of the beta rays by the energy of the beta ray according to the depths of the first detector 110 and the second detector 120 Can be determined.

The counting unit 130 and the control unit 140 have been schematically described above, but a more detailed description will be made with reference to FIG.

Meanwhile, the counting unit 130 and the control unit 140 included in the above-described embodiments may be implemented by a computing device including a memory including instructions programmed to perform these functions, and a microprocessor that executes these instructions have.

FIG. 4 is a flowchart illustrating a nuclide analysis method according to an embodiment. The nuclide analysis method according to FIG. 4 can be performed by the nuclide analysis apparatus 100 described with reference to FIG. 1, and each step will be described as follows.

First, the first detector 110 is inserted into the soil to measure the energy of the beta rays and the gamma rays for a predetermined time (S410). Then, the second detector 120 is inserted at the same position, (S420). In this case, the steps S410 and S420 are not limited to the time-series sequence, and the same measurement result may be used for the same time at the same position. Also, the energy and amount of radiation emitted during the same period of time at the same location as the nuclear paper is constant as long as the soil environment does not change, so it can be measured sequentially at the same location.

5 is a graph illustrating a first measurement result of counting the number of times of detection of the betaine and the gamma ray for each energy of the betaine and the gamma ray measured by the first detector 110. FIG.

Referring to FIG. 5, the counting unit 130 may derive a first measurement result of counting the number of times of detection of the betaine and the gamma ray for a predetermined time, for each energy of the betaine and the gamma ray measured by the first detector 110 (S430).

For example, when the energy of the radiation measured for a predetermined time in the first detector 110 is the same as that in FIG. 3, five times of 600 to 700 keV, four times of 1100 to 1300 keV, and two times of 1500 to 1600 keV The number of radiation detections can be counted as shown in FIG. 5 by the energy of the radiation. In this case, since the first detector 110 measures the beta rays and the gamma rays without discriminating between the beta rays and the gamma rays, the values measured by the first detector 110 are the voltage signals by the beta rays and the voltage signals by the gamma rays Are mixed.

FIG. 6 is a graph for explaining a second measurement result of counting the number of times of detection of the Beta line for each energy of the Beta line according to the result measured by the second detector 120. FIG.

Referring to FIG. 6, the counting unit 130 may derive a second measurement result of counting the number of times of sensing the beta rays for a predetermined time, according to the energy of the beta rays measured by the second detector 120 (S440).

The second detector 120 measures only the beta ray. For example, as shown in FIG. 6, the energy of the beta rays measured by the second detector 120 for a predetermined time is 600 to 700 keV four times, and 1100 to 1300 keV twice , 1500 ~ 1600 keV can be counted as 2 times.

In this case, steps S430 and S440 are not limited to the time series.

On the other hand, in the first graph obtained through the first detector 110, voltage signals due to the beta rays and the gamma rays are all present, whereas in the second graph obtained through the second detector 120, there is no voltage signal due to the gamma rays It is possible to obtain the voltage signal by the gamma ray by obtaining the difference of the radiation sensed in the first and second graphs.

FIG. 7 is a graph for explaining a third measurement result in which the number of detection of gamma rays is counted for a predetermined time by energy of a gamma ray by subtracting a second measurement result from the first measurement result.

Referring to FIG. 7, the controller 140 can derive a third measurement result by subtracting the second measurement result from the first measurement result and counting the number of times of detection of the gamma ray for a predetermined time by the energy of the gamma ray (S450 ).

The first measurement result is a result of counting the number of times of detection of the beta rays and the gamma rays by the energy of the beta ray and the gamma ray measured for a predetermined time by the first detector 110 capable of measuring both the beta ray and the gamma ray. The result of counting the number of times of detection of the Beta line by the energy of the Beta line measured for a predetermined time by the second detector 120 capable of measuring only the Beta line. Therefore, subtracting the count value for each energy of the second measurement result from the count value for each energy of the first measurement result, a third measurement result in which the number of times of detection of the gamma ray for each energy of the gamma ray is counted is derived.

For example, in the first measurement result of FIG. 5, the voltage generated by the first detector 110 by the beta ray and the gamma ray for a predetermined time is 5 to 600 keV, 4 to 1100 to 1300 keV, 1500 to 1600 6, the voltage generated from the second detector 120 by the beta ray is 600 to 700 keV for 4 times, 1100 to 1300 keV for 2 times, 1500 to 1500 keV for the predetermined time, When the second measurement result is subtracted from the first measurement result, 600 to 700 keV is counted as 1, 1100 to 1300 keV is counted as 2, and 1500 to 1600 keV is counted as 0 as 1600 keV is 2. Therefore, 3 Measurement results can be derived. As a result, it can be confirmed that the result of counting by gamma ray for a predetermined time is 3 times for 600 ~ 700 keV and 2 times for 1100 ~ 1300 keV.

Then, the control unit 140 may refer to the library containing the nuclear type radiation energy information to determine the beta rays and the gamma ray emitting nuclides from the third measurement result (S460).

There are beta-rays and gamma-ray emitting nuclides simultaneously emitting beta-rays and gamma rays, and pure beta-emitting nuclides releasing only beta-rays, but nuclides emitting only gamma rays are not present. Therefore, from the third measurement result including only information on the gamma ray, the beta ray and the gamma ray emitting radionuclide included in the third measurement result can be derived by referring to the library storing the nuclear type radiation energy information.

For example, if a gamma ray emitted by cesium in a library is measured with a voltage signal of 600 to 700 keV and a gamma ray emitted by the cobalt is stored as being measured by a voltage signal of 1100 to 1300 keV, , And the presence of cesium and cobalt as beta-ray and gamma-emitting nuclides at the depth measured through the nuclide analyzer 100 can be derived.

On the other hand, since the second detector 120 receives only the beta rays, the second measurement result counts the number of times of detection according to the energy of the beta ray. At this time, the second measurement result is counted as a mixture of the beta rays emitted by the beta rays and gamma ray emitting nuclides and the beta rays emitted by the pure beta ray emitting nuclides.

At this time, the beta ray and gamma ray emitting nuclides are derived through the step S460. Since the library stores the ratios of the beta rays and the gamma rays emitted from the beta rays and the gamma ray emitting nuclei and the respective energies, the controller 140 controls the gamma ray emitting nuclides The fourth measurement result can be derived by subtracting the number of times of detection of the betaine by the beta rays and the gamma ray emitting nuclides in the second measurement result on the basis of the beta ray emission rate of the gamma ray of the second measurement result.

For example, for convenience of explanation, it is assumed that the voltage signals measured by the beta rays and gamma rays emitted by cesium are 600 to 700 keV, and the voltage signals measured by gamma rays emitted by cobalt are equal to 1100 to 1300 keV . In this case, cesium and cobalt exist as beta-ray and gamma-ray emitting nuclides according to the third measurement result of FIG. 7, so that the ratio of gamma ray and beta ray emitted by cesium is 1: If the ratio of the betaine is 2: 1, since the number of times of detection of gamma rays is one in Fig. 7 in the case of cesium, it can be expected that the beta rays are emitted once. In the case of cobalt, , And the beta ray was emitted once.

As a result, it is possible to deduce the fourth measurement result as shown in FIG. 8 by subtracting the number of detection of the beta rays by the gamma ray emitting nuclides in the second measurement result. In the fourth measurement result, the beta ray and the gamma ray emitting nucleus release beta rays Since the number of detections is subtracted, only the number of counts detected by the pure beta-emitting nuclides remain.

Accordingly, the controller 140 can refer to the library to determine the net beta-emission nuclides from the fourth measurement result (S480).

In addition, the number of times of detection of the gamma rays by the energy of the gamma ray according to the measured depths of the first detector 110 and the second detector 120 can be measured to determine the distribution amount of the beta rays and the gamma ray emitting nuclides according to the depth (S490) .

The number of gamma-ray counts in the third measurement result is proportional to the distribution of beta-rays and gamma-emitting nuclides. Thus, the number of counts of the third measurement result will vary depending on the depth of measurement of the first detector 110 and the second detector 120.

For example, when the measurement is performed for a predetermined time at a position 10 cm below the ground, the number of counts of 600 to 700 keV energy of the third measurement result is three times, and the measurement result is measured for a predetermined time at a point below 50 cm from the ground. If the counting number of 600 to 700 keV energy is 30, the cesium that emits 600 to 700 keV gamma rays can be analyzed to be about 10 times greater than the point 10 cm below 50 cm from the ground. Thus, in this way, The distribution of nuclides can be measured.

In addition, it is possible to determine the distribution amount of the pure beta emission nuclides according to the depth by discriminating the number of times of detection of the beta rays by the energy of the beta rays according to the depths of the first detector 110 and the second detector 120 (S495).

The number of beta-ray counts in the fourth measurement is proportional to the distribution of pure beta-emitting nuclides. Accordingly, the number of counts of the fourth measurement result will vary according to the measurement depths of the first detector 110 and the second detector 120, and as exemplified in step S490, The distribution of beta-emitting radionuclides can be measured.

As described above, according to the above-described embodiment, it is possible to separate and discriminate the beta-ray and gamma-ray emitting nuclides and pure beta ray emitting nuclides without pretreatment in the field, and furthermore, the distribution amount of nuclides according to depth can be analyzed.

The above-described embodiments of the present invention can be implemented by various means. For example, embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.

In the case of hardware implementation, the method according to embodiments of the present invention may be implemented in one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing DkeVices (DSPDs), Programmable Logic DkeVices , FPGAs (Field Programmable Gate Arrays), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of an implementation by firmware or software, the method according to embodiments of the present invention may be implemented in the form of a module, a procedure or a function for performing the functions or operations described above. The software code can be stored in a memory unit and driven by the processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various well-known means.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Nuclide analyzer
110: first detector
120: second detector
130:
140:
A:
B:
C: Photomultiplier tube

Claims (10)

delete A method for analyzing nuclides using a first detector for simultaneously measuring the energy of a beta ray and a gamma ray and a second detector for measuring energy of a beta ray,
Obtaining a first measurement result of counting the number of times of detection of the beta rays and gamma rays for a predetermined time by the energy of the beta ray and the gamma ray measured by the first detector;
Calculating a second measurement result by counting the number of times of sensing the beta ray for the predetermined time for each energy of the beta ray measured by the second detector;
Calculating a third measurement result by counting the number of times of detection of the gamma ray for the predetermined time for each energy of the gamma ray by subtracting the second measurement result from the first measurement result;
Identifying a beta ray and a gamma ray emitting nuclide from the third measurement result by referring to a library containing nuclear energy information,
Measuring the number of times of detection of the gamma ray for each energy of the gamma ray according to the positions of the first detector and the second detector and discriminating the amount of distribution of the beta rays and the gamma ray emitting nuclides according to the position
Nuclide analysis method.
A method for analyzing nuclides using a first detector for simultaneously measuring the energy of a beta ray and a gamma ray and a second detector for measuring energy of a beta ray,
Obtaining a first measurement result of counting the number of times of detection of the beta rays and gamma rays for a predetermined time by the energy of the beta ray and the gamma ray measured by the first detector;
Calculating a second measurement result by counting the number of times of sensing the beta ray for the predetermined time for each energy of the beta ray measured by the second detector;
Calculating a third measurement result by counting the number of times of detection of the gamma ray for the predetermined time for each energy of the gamma ray by subtracting the second measurement result from the first measurement result;
Identifying a beta ray and a gamma ray emitting nuclide from the third measurement result by referring to a library containing nuclear energy information,
Obtaining a fourth measurement result by subtracting the number of times of detection of the betaine by the beta ray and the gamma ray emitting nuclide from the second measurement result based on the release ratio of the beta ray to the gamma ray of the beta ray and the gamma ray emitting nuclide derived from the library Wow,
Determining the pure beta-emitting nuclide from the fourth measurement result by referring to the library
Nuclide analysis method.
The method of claim 3,
Determining the number of times the beta rays are sensed for each energy of the beta ray according to the positions of the first detector and the second detector and determining the distribution amount of the pure beta rays emission nuclides according to the position
Nuclide analysis method.
delete A first detector for simultaneously measuring the energy of the beta rays and the gamma rays,
A second detector for measuring only the energy of the beta rays,
A first measurement result of counting the number of times of detection of the beta rays and gamma rays for a predetermined time by the energy of the beta rays and gamma rays measured by the first detector and a first measurement result of the predetermined number of times of the energy of the beta rays measured by the second detector, A counting unit for obtaining a second measurement result obtained by counting the number of sensing times of the betaine during a predetermined time,
A third measurement result obtained by subtracting the second measurement result from the first measurement result by counting the number of times of detection of the gamma ray for the predetermined time by the energy of the gamma ray with reference to a library containing nuclear energy information of the kind, And a control unit for discriminating a gamma ray emitting nuclide,
Wherein,
Measuring the number of times of detection of the gamma ray for each energy of the gamma ray according to the positions of the first detector and the second detector to determine the amount of distribution of the beta ray and gamma ray emitting nuclide according to the position
Nuclide analysis device.
A first detector for simultaneously measuring the energy of the beta rays and the gamma rays,
A second detector for measuring only the energy of the beta rays,
A first measurement result of counting the number of times of detection of the beta rays and gamma rays for a predetermined time by the energy of the beta rays and gamma rays measured by the first detector and a first measurement result of the predetermined number of times of the energy of the beta rays measured by the second detector, A counting unit for obtaining a second measurement result obtained by counting the number of sensing times of the betaine during a predetermined time,
A third measurement result obtained by subtracting the second measurement result from the first measurement result by counting the number of times of detection of the gamma ray for the predetermined time by the energy of the gamma ray with reference to a library containing nuclear energy information of the kind, And a control unit for discriminating a gamma ray emitting nuclide,
Wherein,
Determining a fourth measurement result obtained by subtracting the number of times of detection of the betaine by the beta ray and the gamma ray emitting nuclide from the second measurement result based on the beta ray emission rate of the beta ray and the gamma ray emitting nuclide derived from the library to the gamma ray, From the results of the fourth measurement, it is possible to derive pure beta-emitting nuclides from the library
Nuclide analysis device.
8. The method of claim 7,
Wherein,
Determining the number of times of detection of the beta rays according to the energy of the beta ray according to the positions of the first detector and the second detector and discriminating the distribution amount of the pure beta rays emission nuclides according to the positions
Nuclide analysis device.
A program stored in a computer-readable medium for causing a processor to perform the method of any one of claims 2 to 4.
A computer-readable medium having recorded thereon a program for causing a processor to perform the method of any one of claims 2 to 4.

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