Energy spectrum analytical method of X-ray filtering reference radiation

Abstract

The invention belongs to the technology of ionizing radiation, in particular to an energy spectrum analytical method of X-ray filtering reference radiation. The energy spectrum analytical method of X-ray filtering reference radiation measures X-ray filtering reference radiation of low air kerma rate and narrow-spectrum through an HP Ge energy disperse spectroscopy, finds out a method that energy spectrum analysis of the measured spectrum can be conducted through a backscrolling energy spectrum method, obtains fluence spectrum and characteristic values of a reference radiation field, and compares the fluence spectrum and characteristic values with the recommended value of the fluence spectrum and characteristic values of the national standard, good in conformance, and verifies accuracy and reliability of the established X-ray reference radiation.

Description

technical field [0001] The invention belongs to ionizing radiation measurement technology, in particular to an energy spectrum analysis method for filtering X-ray reference radiation. Background technique [0002] Filtering X-ray reference radiation is a very important reference radiation in ionizing radiation metrology. The national standard "GB / T 12162-2000" stipulates the average energy, energy resolution, half-value layer, homogeneity coefficient and other parameters of different series of filtered X-ray reference radiation, and recommends to confirm the average energy and energy resolution by energy spectrum research Rate. Continuous X-ray energy spectrum analysis has always been a difficult problem in the field of nuclear detection. In the early days, NaI detectors were used for experimental measurement, and energy spectrum analysis was performed by methods such as stripping spectroscopy. The accuracy of the energy spectrum obtained was low; after the development of H...

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Problems solved by technology

Continuous X-ray energy spectrum analysis has always been a difficult problem in the field of nuclear detection. In the early days, NaI detectors were used for experimental measurement, and energy spectrum analysis was performed by methods such as stripping spectroscopy. The accuracy of the energy spectrum obtained was low; after the development of HPGe spectrometers, Internationally, HPGe spectrometers have been used to continuously measure X-ray energy spectra, and the fluence spectra obtained by analyzing the measured spectra with stripping spectroscopy, least squares or inverse volume spectroscopy; while in China, although GB / T 12162-2000 recommends Use the method of energy spectrum research to determine the characteristic parameters of filtering X reference radiation, but there are few reports on related work at home and abroad in recent years

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