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Portable alpha and beta surface contamination survey meter

A surface pollution, portable technology, used in β surface pollution measuring instrument, portable α field, can solve the problems of small detection area, low sensitivity, pollution of human body, objects, environment, etc., to achieve high sensitivity, easy to use, light weight. Effect

Inactive Publication Date: 2015-06-24
上海新漫传感科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Most of the radiation sources that people use in large quantities are emitters of various radiations, leaked from nuclear power plants or nuclear facilities 131 I. 137 Cs and transuranium elements will emit α or β radiation, and radon in the earth's crust will emit α radiation. These substances are easy to contaminate the surface of the human body or other objects, polluting the human body, objects, and the environment
At present, the radiation detectors used in the measurement of α and β ray pollution mostly use GM tubes, gas-holding proportional counter tubes, etc., with small detection areas and relatively low sensitivity.
Most of the instruments adopt the design of separating the secondary instrument and the probe, which is not conducive to portability

Method used

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  • Portable alpha and beta surface contamination survey meter

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Experimental program
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Effect test

Embodiment 1

[0023] In the present embodiment, the compound detection element 13 in the α, β probe 10 adopts the plastic scintillator film that is coated with ZnS (Ag), and the plastic scintillator is 100mm * 170mm, and the thickness is 0.7mm, and the thickness of ZnS (Ag) is 6mg·cm -2 . The light-shielding layer 12 is double-sided aluminized polyester film, the thickness of the aluminum-coated layer is 0.5 μm, and the thickness of the double-sided aluminized polyester film is 6 μm.

[0024] Through the corresponding experimental measurement, the measured α and β backgrounds are about 0.1cps and 15cps respectively, which can correctly determine the natural background α and β levels. The instrument has high sensitivity and weighs about 800g, realizing the advantages of portability.

Embodiment 2

[0026] In the present embodiment, the compound detection element 13 in the α, β probe 10 adopts the plastic scintillator film that is coated with ZnS (Ag), and the plastic scintillator is 100mm * 100mm, and the thickness is 0.5mm, and the thickness of ZnS (Ag) is 8mg·cm -2 . The light-shielding layer 12 is double-sided aluminized polyester film, the thickness of the aluminized layer is 1 μm, and the thickness of the polyester film is 5 μm.

[0027] Through the corresponding experimental measurement, the measured α and β backgrounds are about 0.07cps and 8cps respectively. The weight of the instrument is about 650g and it is easy to use.

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Abstract

The invention discloses a portable alpha and beta surface contamination survey meter which comprises an alpha and beta probe and a control system. A plastic scintillator coated with ZnS(Ag) is adopted as a detection element of the alpha and beta probe, a two-sided aluminized polyester film is adopted as a light shielding layer, and air is adopted as light guide. The portable alpha and beta surface contamination survey meter adopts integrated design, and is large in measurement area, high in sensitivity, compact in structure, light and convenient to carry.

Description

technical field [0001] The invention relates to a radiation pollution measuring instrument, in particular to a portable α and β surface pollution measuring instrument. Background technique [0002] Most of the radiation sources that people use in large quantities are emitters of various radiations, leaked from nuclear power plants or nuclear facilities 131 I. 137 Cs and transuranium elements will emit α or β radiation, and radon in the earth's crust will emit α radiation. These substances are easy to contaminate the surface of the human body or other objects, polluting the human body, objects, and the environment. At present, the radiation detectors used in the measurement of α- and β-ray pollution mostly use GM tubes, gas-holding proportional counter tubes, etc., with small detection areas and relatively low sensitivity. Most of the instruments adopt the design that the secondary instrument and the probe are separated, which is not conducive to portability. [0003] Comp...

Claims

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Application Information

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IPC IPC(8): G01T1/16
Inventor 范祥祥张燊汪加龙严小华孙刚赵文渊徐强陈永林
Owner 上海新漫传感科技有限公司
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