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GB/T 45608-2025: Gas-filled ionization chamber for X and γ-ray
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 45608-2025 | English | 459 |
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Gas-filled ionization chamber for X and γ-ray
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GB/T 45608-2025
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Basic data | Standard ID | GB/T 45608-2025 (GB/T45608-2025) | | Description (Translated English) | Gas-filled ionization chamber for X and ��-ray | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | F88 | | Classification of International Standard | 27.120 | | Word Count Estimation | 22,220 | | Date of Issue | 2025-04-25 | | Date of Implementation | 2025-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 45608-2025: Gas-filled ionization chamber for X and γ-ray---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 27.120
CCSF88
National Standard of the People's Republic of China
X-ray and gamma-ray gas-filled ionization chambers
Released on 2025-04-25
2025-11-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Categories 2
5 Technical Requirements 2
5.1 Appearance 2
5.2 Insulation resistance 2
5.3 Ping Slope 3
5.4 Sensitivity 3
5.5 Energy Response 3
5.6 Angular response 3
5.7 Statistical Fluctuations 3
5.8 Response Time 4
5.9 Relative inherent error 4
5.10 Environmental adaptability 4
6 Test methods 6
6.1 Reference conditions and standard test conditions 6
6.2 Test equipment 6
6.3 Appearance 7
6.4 Insulation resistance 7
6.5 pings 7
6.6 Sensitivity 7
6.7 Energy Response 8
6.8 Angular response 8
6.9 Statistical Fluctuations 8
6.10 Response Time 9
6.11 Relative intrinsic error 9
6.12 Environmental adaptability 10
7 Inspection Rules 10
7.1 Inspection categories 10
7.2 Implementation and requirements of inspection 10
7.3 Inspection Items 11
8 Packaging, transportation, storage, labeling 12
8.1 Packaging 12
8.2 Transportation12
8.3 Storage 12
8.4 Sign 12
Appendix A (Normative) Flat slope test method 13
Appendix B (Informative) Angular Response Test Ionization Chamber Rotation Example 15
Reference 17
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed and coordinated by the National Technical Committee for Standardization of Nuclear Instruments (SAC/TC30).
This document was drafted by. China Shipbuilding Industry Corporation 719 Research Institute, China Institute of Radiation Protection, State Power Investment Corporation Nuclear Energy Co., Ltd.
Company, China Academy of Engineering Physics Materials Research Institute, China Nuclear Control System Engineering Co., Ltd., Xi'an China Nuclear Nuclear Instrument Co., Ltd.,
CSSC Nuclear Power Technology Co., Ltd. (Wuhan)
The main drafters of this document are. Zuo Liangzhou, Qiu Shunli, Dai Chuanbo, Chen Xianglei, Liu Haifeng, Cao Qinjian, Li Jianwei, Wu Fang, Wu Hao, Li Yingnan,
Han Jiaxing, Li Shicheng, Deng Peng, Xie Xuetao, Tang Lianhua, Hua Feng, Li Mingxu, Lin Changyong, Shi Li.
X-ray and gamma-ray gas-filled ionization chambers
1 Scope
This document specifies the technical requirements, inspection rules and packaging, transportation, storage and other aspects of X-ray and gamma-ray gas-filled ionization chambers (hereinafter referred to as "ionization chambers").
Storage, marking, etc., and describes the corresponding test methods.
This document applies to the design, manufacture and inspection of X-ray and gamma-ray gas-filled ionization chambers for radiation protection and radiation environment monitoring.
For reference use with a suitable ionization chamber.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 191 Pictorial markings for packaging, storage and transportation
GB/T 4208 Enclosure protection grade (IP code)
GB/T 10257 Rules for quality inspection of nuclear instruments and nuclear radiation detectors
GB/T 10263 Environmental conditions and test methods for nuclear radiation detectors
GB/T 11684 Electromagnetic environment conditions and test methods for nuclear instruments
GB/T 20138 Protection level of electrical equipment enclosure against external mechanical impact (IK code)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Using gas as the working medium, the applied electric field can effectively collect the ions and electrons generated by ionizing radiation in the gas onto the electrodes, but
A hermetically sealed detector of ionizing radiation which is not sufficient to produce amplification effects from gases.
3.2
Gas-filled ionization chamber used to measure X-rays and gamma rays.
3.3
characteristic curvecharacteristiccurve
Under constant radiation conditions, other parameters remain unchanged, indicating the relationship between the current or count rate in the radiation field as a function of the applied voltage in the ionization chamber
curve.
NOTE 1 This curve is a characteristic of all ionization chambers operating in current and pulse mode.
NOTE 2 For detectors operating in current mode, this characteristic curve is a saturation curve.
[Source. GB/T 4960.6-2008, 2.2.73, modified]
3.4
plateau(regions)
The interval in the ionization chamber characteristic curve in which the measured current or count rate is essentially independent of the applied voltage.
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