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Device and method for measuring strong gamma ray energy spectrum using scattering method

A technology of γ-ray and scattering method, which is applied in the field of nuclear testing, can solve the problems of increasing the scattering share and difficult deductions, and achieve the effect of accurate efficiency correction

Inactive Publication Date: 2013-05-08
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

[0005] (2) The Compton plateau produced by 1.17MeV and 1.33MeV gamma rays produced by cobalt-60 source in HPGe is superimposed on the low-energy full-energy peak, which increases the scattering share, which is difficult to deduct in the existing technology

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  • Device and method for measuring strong gamma ray energy spectrum using scattering method
  • Device and method for measuring strong gamma ray energy spectrum using scattering method
  • Device and method for measuring strong gamma ray energy spectrum using scattering method

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Embodiment Construction

[0027] The main working principle of the present invention includes two parts: scattering gamma energy spectrum measurement and measurement energy spectrum correction:

[0028] A. Scattering spectroscopy measurement.

[0029] see figure 1 The device for measuring strong gamma-ray energy spectrum by scattering method used in scattering energy spectrum measurement includes an irradiator 11 with shielding function, a high specific activity isotope radioactive source 12 arranged in the irradiator, and is used to align the irradiator. The front collimator 14 that limits the beam of the γ-ray 13 emitted from the straight hole, the scattering target 15 for receiving the quasi-parallel γ-ray beam 16 formed by the collimation of the front collimator 14, and the scattering target 15 for receiving the output at a fixed 50° angle The detector 18 of the scattered ray 17 is arranged in the inner cavity of the shielding body 19 with collimating holes. The scattering target 15 is preferabl...

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Abstract

The invention relates to a device and a method for measuring strong gamma ray energy spectrum using a scattering method. The device for measuring strong gamma ray energy spectrum using the scattering method comprises an illuminator with a shield function, a high specific activity isotope radioactive source arranged in the illuminator, a front collimator used for constraining a gamma ray emerged through a collimating aperture of the illuminator, a scattering target used for receiving a quasi-parallel gamma ray beam formed by the collimation of the front collimator and a detector used for measuring a scattering ray with 662 kilo electron volt ( keV ) average energy obtained by scattering in a 50 degrees angle, wherein the detector is arranged in an inner cavity of a shield body with the collimating aperture. The device and the method for measuring strong gamma ray energy spectrum using the scattering method resolve the difficult problem of measurement of a strong gamma ray generated by a cobalt-60-source in a calibration laboratory.

Description

technical field [0001] The invention provides a measurement and data correction technology for the energy spectrum measurement of strong gamma ray radiation field, and belongs to the technical field of nuclear testing. Background technique [0002] Usually in the calibration laboratory, radiation source absorption, irradiators, walls, and experimental devices will further scatter the gamma rays emitted by the radiation source, which affects the monochromaticity of energy and brings certain deviations to experimental applications. Especially for the therapeutic level of gamma radiation field, it is necessary to develop radiation field energy spectrum measurement technology to obtain real energy spectrum information and provide accurate energy correction parameters for radiation field applications. However, for the therapeutic level radiation field, at a distance of 1m from the radiation source (usually the experimental location), its intensity can usually reach 10 8 ~10 9 c...

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Application Information

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IPC IPC(8): G01T1/36
Inventor 余小任全林苗亮亮潘孝兵屠荆宋朝晖江新标谭新建苏春磊宋晓靓马燕
Owner NORTHWEST INST OF NUCLEAR TECH
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