CZT spectrometer feature energy peak address range selecting and determining method

A technology of characteristic energy and determination method, which is applied in the direction of X-ray energy spectrum distribution measurement, etc., can solve the problem of lack of scientific methods and methods for dividing and determining the interval range of road sites, and achieve automatic calculation and analysis, scientific road site division effective effect

Active Publication Date: 2019-04-05
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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Problems solved by technology

How to effectively divide and determine the range of road sites lacks scientific methods

Method used

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  • CZT spectrometer feature energy peak address range selecting and determining method
  • CZT spectrometer feature energy peak address range selecting and determining method
  • CZT spectrometer feature energy peak address range selecting and determining method

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Embodiment Construction

[0019] The method for selecting and determining the site range of the characteristic energy peak of the CZT spectrometer: includes the following steps:

[0020] S1: Select the standard source of the same type of nuclide as the object to be measured, and perform energy calibration on it to ensure that the site of the characteristic energy peak of the object to be measured corresponds to its energy one by one;

[0021] S2: Acquire the energy spectrum of the object to be measured, and the measurement time is determined by the activity of the object to be measured to meet the integrity of the energy spectrum of the object to be measured;

[0022] S3: Acquiring the background,

[0023] S4: Obtain the energy efficiency curve of the detector to the standard source in S1 through passive efficiency scale calculation;

[0024] S5: Determine the intersection point of the background curve and the right half curve of the center position of the characteristic energy peak, and determine the...

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Abstract

The invention discloses a CZT spectrometer feature energy peak address range selecting and determining method. The CZT spectrometer feature energy peak address range selecting and determining method comprises the following steps that S1, a standard source of the same nuclide type as a to-be-measured object is selected, energy calibration is conducted on the standard source, and it is ensured thataddresses of a feature energy peak of the to-be-measured object correspond to energy of the to-be-measured object one to one; S2, an energy spectrum of the to-be-measured object is obtained, the measuring time is determined by the activity of the to-be-measured object, and the integrity of the energy spectrum of the to-be-measured object is met; S3, a background is obtained; S4, an energy efficiency curve of a detector to the standard source in the S1 is obtained through passive efficiency scale calculation; S5, the intersection point of a background curve and the curve of the right half partof the center of the feature energy peak is determined, and the address range of the right half part of the center of the feature energy peak is determined through the position of the intersection point; and S6, the measured nuclide net counting rate is obtained through a formula.

Description

technical field [0001] The invention belongs to the field of qualitative and quantitative detection and analysis of a gamma energy spectrum system, and specifically relates to a method for selecting and determining the range of a characteristic energy peak of a CZT spectrometer. Background technique [0002] In the fields of decommissioning of nuclear facilities, treatment of three wastes, and nuclear emergency, various types of gamma spectrometer systems are generally equipped to carry out on-site radiation source investigations. For a decommissioning project, the unit took the lead in introducing a CZT spectrometer system equipped with a passive efficiency calibration function in China. CZT spectrometer has a good technical advantage in the application of high radiation field environment, and can well meet the needs of source item investigation. However, because the CZT spectrometer system cannot realize the automatic division of the range of the characteristic energy pea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/36
CPCG01T1/36Y02E30/30
Inventor 朱晨晨刘雪娇梁勇李玉军李庆光
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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