WO2006035496A1 - α線量率測定方法 - Google Patents
α線量率測定方法 Download PDFInfo
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- WO2006035496A1 WO2006035496A1 PCT/JP2004/014183 JP2004014183W WO2006035496A1 WO 2006035496 A1 WO2006035496 A1 WO 2006035496A1 JP 2004014183 W JP2004014183 W JP 2004014183W WO 2006035496 A1 WO2006035496 A1 WO 2006035496A1
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- WIPO (PCT)
- Prior art keywords
- dose rate
- sample
- track detector
- solid track
- solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T5/00—Recording of movements or tracks of particles; Processing or analysis of such tracks
- G01T5/02—Processing of tracks; Analysis of tracks
Definitions
- the present invention relates to an ⁇ dose rate measuring method, and more particularly to an ⁇ dose rate measuring method capable of measuring a dose rate of ⁇ rays emitted from a sample force with high accuracy.
- Solder materials, wiring materials, sealing materials, and the like contain trace amounts of radioactive substances, and ex-rays may be emitted from these materials.
- Recently, countermeasures against soft errors that provide more reliable semiconductor devices have become extremely important.
- a gas flow type proportional counting device is known as a device for measuring the amount of ex-rays emitted from a sample. If a gas flow type proportional counter is used, it is possible to perform measurement with a detection lower limit of about 0.0 OlcphZcm 2 .
- CphZcm 2 is an abbreviation of count per hour Zcm 2 and is a unit indicating a dose rate per unit area. The dose rate is the amount of radiation per unit time.
- the unit cph / cm 2 is used to indicate whether one a particle is released per hour per lcm 2 of the sample surface.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-50279
- Patent Document 2 JP-A-9-15336
- the gas flow type proportional counting device has a detection lower limit of 0.001 cp. It was about h / cm 2 and the lower limit of detection was not necessarily low enough.
- To provide a hardly semiconductor device of more Sofute Ra is dose rate of OC-rays emitted that is required to use a sufficiently small material than 0. OOlcphZcm 2. For this reason, a technology that can measure the dose rate of OC rays with a lower detection limit has been awaited.
- An object of the present invention is to provide an OC dose rate measurement method capable of measuring the dose rate of ⁇ rays emitted from a sample force with a very low detection limit with high accuracy.
- the first step of leaving the solid track detector and the sample in a state of being overlapped with each other for a predetermined time, and etching the solid track detector, the solid track described above is performed. Based on the second step of forming an etch pit corresponding to the ⁇ ray track incident on the detector in the solid track detector, the number of the etch pits formed in the solid track detector and the standing time. And a third step of obtaining a dose rate of the ⁇ force emitted from the sample force.
- the sample and the solid track detector are allowed to stand for a relatively long time, and the dose rate of ⁇ rays is obtained by dividing the number of etch pits by the leaving time.
- the ⁇ -ray that also emits the sample force is reliably incident on the solid track detector. For this reason, according to the present invention, the dose rate of ⁇ -rays emitted from the sample force can be measured with high accuracy.
- the solid track detector since the sample and the solid track detector are left in the chamber in a state where the chamber is evacuated, the solid track detector is caused by a radioactive substance existing in the air. It is possible to prevent the occurrence of ⁇ -ray tracks. In addition, since there is no air between the sample and the solid track detector, it is possible to prevent the ⁇ ray emitted from the sample from reaching the solid track detector. Therefore, according to the present invention, it is possible to accurately measure the dose rate of the a-line emitted from the sample power.
- the sample and the solid track detector that are overlapped with each other are left in a vacuum packed state, the dose rate of ⁇ -rays without operating the vacuum pump for a long time is reduced. Accurate measurement can be performed with a simple configuration.
- the periphery of the portion where the sample and the solid track detector are overlapped is sealed with the sealing material, after sealing with the sealing material, the radioactive material is contained. Air does not enter the space between the sample and the solid track detector. Therefore, ⁇ rays emitted from the sample can be measured with high accuracy.
- the dose rate of the ⁇ -rays from which the sample force is also emitted can be accurately measured even when the sample is relatively large. Can be measured.
- FIG. 1 is a process diagram showing an ⁇ dose rate measuring method according to a first embodiment of the present invention.
- FIG. 2 is a process diagram showing an ⁇ dose rate measuring method according to a second embodiment of the present invention.
- FIG. 3 is a process diagram showing an ⁇ dose rate measuring method according to a third embodiment of the present invention.
- FIG. 4 is a process diagram (part 1) showing an ⁇ dose rate measuring method according to a fourth embodiment of the present invention.
- FIG. 5 is a process diagram (part 2) illustrating the ⁇ dose rate measuring method according to the fourth embodiment of the present invention.
- FIG. 6 is a process diagram showing an ⁇ dose rate measuring method according to a fifth embodiment of the present invention.
- FIG. 7 is a cross-sectional view showing an ⁇ dose rate measuring method according to a sixth embodiment of the present invention. Explanation of symbols
- FIG. 1 is a process diagram showing an ⁇ dose rate measuring method according to the present embodiment.
- Sample 10 is, for example, a solder material, an electrode material, a wiring material, a sealing material, or the like.
- a solid state track detector for example, a flat plate made of allyl diglycol carbonate (trade name: CR-39) is used.
- the size of the solid track detector 12 is, for example, 90 mm ⁇ 90 mm ⁇ 1 mm.
- a solid state track detector is a radiation detector that can detect the amount of radiation based on this principle.
- the sample 10 and the solid track detector 12 superimposed on each other are introduced into the chamber 14 (see FIG. 1 (a)).
- a vacuum pump 18 is connected to the chamber 14 via a pipe 16.
- the chamber 14 for example, a stainless steel chamber is used.
- the surface in contact with the sample 10 functions as a detection surface for detecting ⁇ rays emitted from the sample 10.
- the air in the chamber 14 is exhausted using the vacuum pump 18, and the chamber 14 is evacuated.
- the pressure in the chamber 14 is, for example, 1 ⁇ 10— or less.
- the sample 10 and the solid track detector 12 are left in the chamber 14 for a predetermined time while the inside of the chamber 14 is maintained in a vacuum state.
- the time for which the sample 10 and the solid track detector 12 are left in the chamber 14 is, for example, several hundred hours to thousands hours, that is, about several weeks to several months.
- air contains a radioactive substance such as radon ( 21 n, 219 Rn, 22 ° Rn).
- radon 21 n, 219 Rn, 22 ° Rn.
- the solid track detector 12 is immersed in an etching solution.
- an etching solution For example, NaOH solution or KOH solution is used as the etchant.
- a chemical change occurs in the molecule constituting the solid track detector 12, so that the alpha ray is incident and compared with the location.
- Etching proceeds at a high speed. Therefore, when the solid track detector 12 is immersed in the etching solution, the ⁇ -ray track is enlarged, and etch pits (Etch Pit) 20 corresponding to the ⁇ -ray track are formed on the surface of the solid track detector 12. (See Fig. 1 (b)).
- the diameter of the etch pit 20 is, for example, about 10 m.
- the number of etch pits 20 is observed using an optical microscope or the like.
- the dose rate of ⁇ rays per unit area is obtained based on the number n of etch pits 20, the standing time t, and the area S of the detection surface.
- the dose rate of alpha rays per unit area can be determined by nZtZS.
- ⁇ -ray tracks may be formed on the solid track detector 12 before the sample 10 and the solid track detector 12 are overlaid. Such a background is considered to be several to several tens.
- the dose rate of ⁇ rays is obtained by dividing the number of etch pits by the leaving time, the effect of the nottag round becomes smaller as the leaving time is set longer. Therefore, according to the present embodiment, it is possible to obtain the dose rate of a-line with extremely high accuracy.
- the dose rate of the a-line emitted from the sample 10 is measured.
- the amount of a rays emitted from the sample 10 is determined as a solid.
- One of the main features of measuring with the track detector 12 is.
- the detection limit is relatively large force ivy and 0. OO lcphZcm 2 about.
- the sample 10 and the solid track detector 12 are allowed to stand for a relatively long time, and the dose rate of ⁇ rays is obtained by dividing the number of etch pits by the standing time. Therefore, the longer the standing time is set, the smaller the influence of the background can be reduced. Therefore, according to the present embodiment, it is possible to obtain the dose rate of ⁇ rays with extremely high accuracy.
- the ex dose rate measuring method according to the present embodiment has one of the main features in that the sample 10 and the solid track detector 12 are left in an overlapped state, more preferably in a closely contacted state. is there.
- the sample 10 and the solid track detector 12 are left in an overlapped state, ⁇ rays emitted from the sample 10 are reliably incident on the solid track detector 12. . Therefore, according to the present embodiment, the dose rate of ⁇ rays emitted from the sample 10 can be determined with high accuracy.
- the ex dose rate measuring method according to the present embodiment is one of the main features in that the sample 10 and the solid track detector 12 are left in the chamber 14 in a state where the chamber 14 is evacuated. There is.
- the solid track is caused by the radioactive substance existing in the air. It is possible to prevent the occurrence of ⁇ -ray tracks on the detector 12.
- the dose rate of ⁇ rays emitted from the sample 10 can be accurately measured.
- FIG. 2 is a process diagram showing the ⁇ dose rate measuring method according to the present embodiment.
- First embodiment shown in FIG. The same components as those in the ⁇ dose rate measurement method by the same reference numerals are given the same reference numerals, and the description will be omitted or simplified.
- the ⁇ dose rate measurement method according to the present embodiment is mainly characterized in that the sample 10 and the solid track detector 12 that are overlapped with each other are left in a vacuum-packed state.
- a sample 10 and a solid track detector 12 are prepared in the same manner as in the ⁇ dose rate measuring method according to the first embodiment.
- the sample 10 and the solid track detector 12 overlapped with each other are introduced into a vacuum pack container (vacuum pack bag) 22.
- the air in the vacuum pack container 22 is evacuated using a vacuum pump (see FIG. 1 (a)) 18, and the vacuum pack container 22 is evacuated. Thereby, the sample 10 and the solid track detector 12 are in close contact with each other. Thereafter, the vacuum packing container 22 is sealed (see FIG. 2 (a)).
- the sample 10 and the solid track detector 12 are left for a predetermined time.
- the time for which the sample 10 and the solid track detector 12 are allowed to stand is, for example, about several hundred hours to several thousand hours, as in the first embodiment.
- the a-line is emitted from the vacuum packing container 22.
- the surface force of the sample 10 and the solid track detector 12 is also about several tens / zm.
- the alpha ray can only reach the depth.
- alpha rays emitted from the vacuum packaging container 22 may reach the detection surface of the solid track detector 12, that is, the portion where the sample 10 and the solid track detector 12 are in close contact with each other. I don't get it. Therefore, even if ⁇ rays are emitted from the vacuum pack container 22, no particular problem arises in measuring the amount of ⁇ rays emitted from the sample 10.
- the sample 10 and the solid track detector 12 are taken out from the vacuum pack container 22.
- the solid track detector 12 is immersed in an etching solution.
- etching solution for example, a NaOH solution or a KOH solution is used as in the ⁇ dose rate measuring method according to the first embodiment.
- the track due to the a line incident on the solid track detector 12 is enlarged by etching, and etch pits 20 corresponding to the track of the a line are formed in the solid track detector 12 (see FIG. 2B).
- ⁇ rays per unit area are determined based on the number n of etch pits 20, the exposure time t, and the area S of the detection surface.
- the dose rate of the a-line emitted from the sample 10 is measured.
- the sample 10 and the solid track detector 12 that overlap each other may be left in a vacuum-packed state.
- the dose rate of OC rays can be accurately measured with a simple configuration without operating the vacuum pump 18 for a long time.
- FIG. 3 is a process diagram showing the ex dose rate measuring method according to the present embodiment.
- 3 (a) is a plan view
- FIG. 3 (b) is a cross-sectional view taken along the line AA ′ of FIG. 3 (a)
- FIG. 3 (b) is a plan view.
- the same components as those in the ⁇ dose rate measuring method according to the first or second embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is omitted or simplified.
- the sample 10 and the solid track detector 12 are left in a state where the periphery of the portion where the sample 10 and the solid track detector 12 are overlapped is sealed. There are main characteristics.
- a sample 10 and a solid track detector 12 are prepared in the same manner as in the ⁇ dose rate measuring method according to the first embodiment.
- the sample 10 and the solid track detector 12 are overlaid. As a result, the sample 10 and the solid track detector 12 are in close contact with each other.
- the periphery of the portion where the sample 10 and the solid track detector 12 overlap is sealed with a sealing material 24 (see FIGS. 3 (a) and 3 (b)).
- a sealing material 24 for example, a sealing material made of resin is used.
- the sample 10 and the solid track detector 12 are left for a predetermined time.
- the time for which the sample 10 and the solid track detector 12 are allowed to stand is, for example, about several hundred hours to several thousand hours, as in the above embodiment.
- the solid track detector 12 is immersed in an etching solution.
- etching solution for example, a NaOH solution or a soot solution is used as in the ⁇ dose rate measuring method according to the above embodiment.
- the track due to the a line incident on the solid track detector 12 is enlarged by etching, and etch pits 20 corresponding to the track of the a line are formed in the solid track detector 12 (see FIG. 3C).
- the number of etch pits 20 is observed using an optical microscope, as in the ⁇ dose rate measurement method according to the above embodiment.
- the dose rate of ⁇ rays per unit area based on the number of etch pits ⁇ , the standing time t, and the area S of the detection surface Ask for.
- the dose rate of the a-line emitted from the sample 10 is measured.
- the periphery of the portion where the sample 10 and the solid track detector 12 are overlapped may be sealed with the sealing material 24.
- the radioactive material is sealed after the sealing with the sealing material 24.
- the atmosphere containing the substance does not enter the sample 10 and the solid track detector 12 anew. Therefore, also in this embodiment, the a-line emitted from the sample 10 can be measured with high accuracy.
- the sample 10 is relatively large. Can be measured.
- FIG. 4 and 5 are process diagrams showing the ⁇ dose rate measuring method according to the present embodiment.
- Fig. 1 The same components as those in the ⁇ dose rate measuring method according to the first to third embodiments shown in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted or simplified.
- the ex dose rate measurement method is a method in which a plurality of other solid track detectors 12a and 12b manufactured in the same lot as the solid track detector 12 are overlapped with each other and left for a predetermined time. From the ⁇ -ray dose rate obtained based on the number of etch pits 20 formed on the solid track detector 12, the number is obtained based on the number of etch pits 20 formed on the other solid track detector 12a. The main feature is in subtracting the dose rate of alpha rays.
- the sample 10 and the solid track detector 12 superimposed on each other are introduced into the chamber 14.
- the other two solid state track detectors 12 a and 12 b superimposed on each other are introduced into the channel 14.
- the air in the chamber 14 is exhausted using the vacuum pump 18, and the inside of the chamber 14 is evacuated.
- the sample 10 and the solid track detectors 12, 12 a, 12 b are left for a predetermined time in a state where the inside of the chamber 14 is evacuated.
- the time for which the sample 10 and the solid track detectors 12, 12a, 12b are allowed to stand is, for example, several hundred hours to several thousand hours, as described above.
- the pressure in the chamber 14 is, for example, 10 ⁇ or less as described above.
- each of the solid track detectors 12 and 12a is immersed in an etching solution.
- the etching solution use NaOH solution or KOH solution as above. In this way, the track due to ⁇ rays incident on the solid track detectors 12 and 12a is enlarged by etching, and etch pits 20 corresponding to the track of ⁇ rays are formed on the solid track detectors 12 and 12a.
- the dose rate of ⁇ rays per unit area is obtained based on the number n of etch pits formed in the solid track detector 12, the standing time t, and the area S of the detection surface. Also other solid flying Based on the number of etch pits formed in the trace detector 12a, the standing time, and the area S ′ of the detection surface, the dose rate of ⁇ rays per unit area is obtained. Then, from the dose rate of ⁇ rays obtained based on the number ⁇ of etch pits formed in the solid track detector 12, it was obtained based on the number of etch pits formed in the other solid track detector 12a. Subtract the alpha dose rate.
- the etch pits formed in the other solid track detectors 12a are determined from the dose rate of ⁇ rays determined based on the number of etch pits 20 formed in the solid track detectors 12.
- the reason for subtracting the ⁇ -ray dose rate calculated based on the number of 20 is as follows.
- the solid track detector 12 has a track formed by a line or the like before the sample 10 and the solid track detector 12 are overlaid. There can be.
- a track may be formed in the solid track detector 12 due to the ⁇ rays from which the solid track detector 12 itself is also released. If the solid track detectors 12a and 12b manufactured in the same lot as the solid track detector 12 are left on top of each other under the same conditions as the solid track detector 12, they are formed in advance on the solid track detector 12a. The sum of the number of tracks and the solid track detector 12a itself is also released. The sum of the number of tracks due to alpha rays is the same as the number of tracks previously formed on the solid track detector 12 and the solid track detector 12 itself.
- the ⁇ -ray dose rate determined based on the number of etch pits 20 formed on the solid track detector 12 is calculated based on the number of etch pits 20 formed on the other solid track detector 12a.
- Sample 10 was prepared by forming a Cu film on a silicon substrate.
- the sample 10 and the solid track detectors 12, 12a, 12b are left in the chamber 14 for 2689.85 hours. It was.
- etching was performed on the solid track detector 12 that was left to overlap with the sample 10
- 46 etch pits 20 were observed.
- etching was performed on the solid track detector 12a that was left to overlap with the solid track detector 12b
- twelve etch pits 20 were observed.
- the area of the detection surface of each of the solid track detectors 12 and 12a was 171.8 cm 2 .
- Sample 10 a plate-like body made of lead solder was prepared.
- the time for which the sample 10 and the solid track detector 12 were left in the chamber 14 was 620.41 hours.
- etching was performed on the solid track detector 12 that was left to overlap with the sample 10
- 7200 etch pits 20 were observed.
- etching was performed on the solid track detector 12a that had been left to overlap with the solid track detector 12b
- six etch pits 20 were observed.
- the area of the detection surface of the solid track detectors 12 and 12a was 56.5 cm 2 .
- a plurality of other solid track detectors 12a and 12b manufactured in the same lot as the solid track detector 12 are overlapped with each other.
- the number of etch pits 20 formed on other solid track detectors 12a based on the ⁇ -ray dose rate determined based on the number of etch pits 20 formed on the solid track detectors 12 The main characteristic is to subtract the dose rate of the a-line obtained based on [0085]
- the etch pitches formed in the other solid track detectors 12a are determined. Since the dose rate of ⁇ rays obtained based on the number of samples is subtracted, the dose rate of ⁇ rays emitted only from sample 10 can be measured with higher accuracy.
- FIG. 6 is a process diagram showing the ⁇ dose rate measuring method according to the present embodiment.
- the same components as those in the ⁇ dose rate measuring method according to the first to fourth embodiments shown in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof will be omitted or simplified.
- the ex dose rate measurement method according to the present embodiment is a method in which the solid track detectors 12a and 12b manufactured in the same lot as the solid track detector 12 stacked on the sample 10 are vacuumed in a state where they are stacked on each other.
- the main feature is that it is left unpacked.
- the sample 10 and the solid track detector 12 superimposed on each other are placed in the vacuum pack container 22.
- the air in the vacuum pack container 22 is exhausted using the vacuum pump 18 (see FIG. 1), and the vacuum pack container 22 is evacuated. Then, the vacuum packaging container 22 is sealed.
- the air in the vacuum pack container 22a is evacuated using the vacuum pump 18, and the vacuum pack container 22a is evacuated. Then, the vacuum packing container 22a is sealed.
- the vacuum-packed sample 10 and solid track detector 12 and the other vacuum-packed solid track detectors 12a and 12b are left for a predetermined time.
- the leaving time is, for example, several hundred hours to several thousand hours, as in the above embodiment.
- the sample 10 and the solid track detector 12 are taken out from the vacuum pack container 22. Also, the sample 10 and the solid track detector 12 are taken out from the vacuum pack container 22. Also, the sample 10 and the solid track detector 12 are taken out from the vacuum pack container 22. Also, the sample 10 and the solid track detector 12 are taken out from the vacuum pack container 22. Also, the sample 10 and the solid track detector 12 are taken out from the vacuum pack container 22. Also, the sample 10 and the solid track detector 12 are taken out from the vacuum pack container 22. Also
- the other solid track detectors 12a and 12b are taken out from the vacuum packed container 22a.
- the solid track detectors 12 and 12a are immersed in an etching solution.
- an etching solution for example, a NaOH solution or a KOH solution is used as described above.
- the ⁇ ray tracks incident on the solid track detectors 12 and 12a are enlarged by etching, and etch pits 20 corresponding to the ⁇ ray tracks are formed on the solid track detectors 12 and 12a, respectively.
- the dose rate of ⁇ rays per unit area is obtained based on the number n of etch pits formed in the solid track detector 12, the standing time t, and the area S of the detection surface. Further, the dose rate of ⁇ rays per unit area is obtained based on the number of etch pits formed in the other solid track detector 12a, the standing time, and the area S ′ of the detection surface. Then, from the dose rate of ⁇ rays obtained based on the number ⁇ of etch pits formed in the solid track detector 12, it was obtained based on the number of etch pits formed in the other solid track detector 12a. Subtract the alpha dose rate.
- the dose rate of the a-line emitted from the sample 10 is measured.
- FIG. 7 is a cross-sectional view showing the ⁇ dose rate measuring method according to the present embodiment.
- the same components as those in the ⁇ dose rate measuring method according to the first to fifth embodiments shown in FIGS. 1 to 6 are denoted by the same reference numerals, and description thereof will be omitted or simplified.
- the ex dose rate measuring method according to the present embodiment is such that a plurality of solid track detectors 12a and 12b manufactured in the same lot as the solid track detector 12 to be superimposed on the sample 10 are overlapped with each other.
- the solid track detectors 12a and 12b are mainly sealed with a sealing material 24.
- sealing material 24 a sealing material made of, for example, a resin is used as described above.
- the sample 10 and the solid track detectors 12, 12a, 12b are left for a predetermined time.
- the time for which the sample 10 and the solid track detectors 12, 12a, 12b are allowed to stand is, for example, about several hundred hours to several thousand hours, as described above.
- the solid track detectors 12 and 12a are immersed in an etching solution.
- an etching solution for example, a NaOH solution or a KOH solution is used as described above.
- the ⁇ -ray tracks incident on the solid track detectors 12 and 12a are enlarged by etching, and etch pits 20 corresponding to the ⁇ -ray tracks are formed on the solid track detectors 12 and 12a, respectively.
- the dose rate of ⁇ rays per unit area is obtained based on the number n of etch pits formed in the solid track detector 12, the standing time t, and the area S of the detection surface.
- the dose rate of ⁇ rays per unit area is determined based on the number of etch pits formed in the other solid track detector 12a, the standing time, and the area S ′ of the detection surface.
- the dose rate of ⁇ rays obtained based on the number ⁇ of etch pits 20 formed on the solid track detector 12 it is obtained based on the number of etch pits 20 formed on the other solid track detector 12a. Subtract the dose rate for the given OC line.
- allyl diglycol carbonate is used as the material of the solid track detector
- the material of the solid track detector is not limited to allyl diglycol carbonate.
- Any other resin capable of obtaining etch pits according to ⁇ -ray tracks can be used as a material for solid track detectors.
- the ⁇ dose rate measuring method according to the present invention is useful for measuring the dose rate of ⁇ rays emitted from a sample with high accuracy.
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PCT/JP2004/014183 WO2006035496A1 (ja) | 2004-09-28 | 2004-09-28 | α線量率測定方法 |
JP2006537590A JPWO2006035496A1 (ja) | 2004-09-28 | 2004-09-28 | α線量率測定方法 |
US11/723,612 US20070170364A1 (en) | 2004-09-28 | 2007-03-21 | Alpha ray dose rate measuring method |
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PCT/JP2004/014183 WO2006035496A1 (ja) | 2004-09-28 | 2004-09-28 | α線量率測定方法 |
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US11/723,612 Continuation US20070170364A1 (en) | 2004-09-28 | 2007-03-21 | Alpha ray dose rate measuring method |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US8366093B2 (en) | 2009-08-03 | 2013-02-05 | Boewe Systec Gmbh | Method and apparatus for determining a sub-group of a group of sheets in a stream of sheets |
JP2015141181A (ja) * | 2014-01-30 | 2015-08-03 | 富士通株式会社 | アルファ線検出装置 |
KR20180089336A (ko) * | 2018-07-20 | 2018-08-08 | 박영웅 | 라돈과 토론을 방출하는 물질에 오염되었는지를 판단하기 위한 방법 및 장치 |
JP2019078627A (ja) * | 2017-10-24 | 2019-05-23 | 国立大学法人名古屋大学 | 積分型検出器の飛跡選別方法、装置およびプログラム |
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- 2004-09-28 JP JP2006537590A patent/JPWO2006035496A1/ja active Pending
- 2004-09-28 WO PCT/JP2004/014183 patent/WO2006035496A1/ja active Application Filing
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2007
- 2007-03-21 US US11/723,612 patent/US20070170364A1/en not_active Abandoned
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JP2003194941A (ja) * | 2001-12-25 | 2003-07-09 | Chiyoda Technol Corp | 中性子測定用線量計素子 |
Cited By (6)
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US8366093B2 (en) | 2009-08-03 | 2013-02-05 | Boewe Systec Gmbh | Method and apparatus for determining a sub-group of a group of sheets in a stream of sheets |
JP2015141181A (ja) * | 2014-01-30 | 2015-08-03 | 富士通株式会社 | アルファ線検出装置 |
JP2019078627A (ja) * | 2017-10-24 | 2019-05-23 | 国立大学法人名古屋大学 | 積分型検出器の飛跡選別方法、装置およびプログラム |
JP7038996B2 (ja) | 2017-10-24 | 2022-03-22 | 国立大学法人東海国立大学機構 | 積分型検出器の飛跡選別方法、装置およびプログラム |
KR20180089336A (ko) * | 2018-07-20 | 2018-08-08 | 박영웅 | 라돈과 토론을 방출하는 물질에 오염되었는지를 판단하기 위한 방법 및 장치 |
KR102169909B1 (ko) | 2018-07-20 | 2020-10-26 | 박영웅 | 라돈과 토론을 방출하는 물질에 오염되었는지를 판단하기 위한 방법 및 장치 |
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JPWO2006035496A1 (ja) | 2008-05-15 |
US20070170364A1 (en) | 2007-07-26 |
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