GB755967A - Improvements in or relating to a method and apparatus for testing the presence of specific atomic elements in a substance - Google Patents
Improvements in or relating to a method and apparatus for testing the presence of specific atomic elements in a substanceInfo
- Publication number
- GB755967A GB755967A GB3234253A GB3234253A GB755967A GB 755967 A GB755967 A GB 755967A GB 3234253 A GB3234253 A GB 3234253A GB 3234253 A GB3234253 A GB 3234253A GB 755967 A GB755967 A GB 755967A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detector
- detected
- neutron
- pulse
- neutron source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000126 substance Substances 0.000 title abstract 2
- 229910052793 cadmium Inorganic materials 0.000 abstract 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract 2
- 239000013078 crystal Substances 0.000 abstract 2
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052790 beryllium Inorganic materials 0.000 abstract 1
- 239000000460 chlorine Substances 0.000 abstract 1
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 229910052699 polonium Inorganic materials 0.000 abstract 1
- HZEBHPIOVYHPMT-UHFFFAOYSA-N polonium atom Chemical compound [Po] HZEBHPIOVYHPMT-UHFFFAOYSA-N 0.000 abstract 1
- 239000000523 sample Substances 0.000 abstract 1
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical class [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
- G01V5/04—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
- G01V5/08—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
- G01V5/10—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources
- G01V5/101—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources and detecting the secondary Y-rays produced in the surrounding layers of the bore hole
Landscapes
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
755,967. Analysis by neutron beams. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Nov. 22, 1954 [Nov. 21, 1953], No. 32342/53. Class 40 (3). The presence of specific atomic elements is detected by irradiating the substance under test with neutrons detecting by means of a scintillation detector gamma rays emitted as a result of the neutron bombardment and analysing the output pulses of the detector to indicate the pulse rate in particular ranges characteristic of the element to be detected. The invention is described with reference to determining the presence of chlorine in a hydrocarbon oil in a pipe D (Fig. 1). A polonium - beryllium neutron source is mounted outside or inside the duct. A thalliumactivated sodium iodide crystal which with photo-multiplier PM constitutes the scintillation detector is separated from the neutron source by a cadmium screen Cd. The output pulses from the detector are amplified and fed to a pulse analyser which selects pulses corresponding to gamma intensities characteristic of the element to be detected and the pulse rate is indicated on meter RM. In the arrangements of Fig. 2 (not shown) and Fig. 3, a probe comprising neutron source S, photo multiplier PM and crystal X surrounded by a cadmium sheath Cd is lowered into a bore hole to determine the nature of the strata surrounding the bore. Since various elements however emit gamma rays having more than one distinctive amplitude, a number of pulse analysers set to respond to different amplitude levels are connected to the amplified detector output. These analysers each operate a recorder. Thus if the first recorder indicates the presence of a peak corresponding to the element the subsequent recorders should indicate the subsidiary peak corresponding to the element. Specification 750,328 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3234253A GB755967A (en) | 1953-11-21 | 1953-11-21 | Improvements in or relating to a method and apparatus for testing the presence of specific atomic elements in a substance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3234253A GB755967A (en) | 1953-11-21 | 1953-11-21 | Improvements in or relating to a method and apparatus for testing the presence of specific atomic elements in a substance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB755967A true GB755967A (en) | 1956-08-29 |
Family
ID=31971950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3234253A Expired GB755967A (en) | 1953-11-21 | 1953-11-21 | Improvements in or relating to a method and apparatus for testing the presence of specific atomic elements in a substance |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB755967A (en) |
-
1953
- 1953-11-21 GB GB3234253A patent/GB755967A/en not_active Expired
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