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JJF 1850-2020 English PDF

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US$559.00 · In stock
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JJF 1850-2020: Calibration Specification for Germanium Gamma-ray Spectrometers
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1850-2020	559	Add to Cart	5 days	Calibration Specification for Germanium Gamma-ray Spectrometers	Valid

Similar standards

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Basic data

Standard ID: JJF 1850-2020 (JJF1850-2020)
Description (Translated English): Calibration Specification for Germanium Gamma-ray Spectrometers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A58
Word Count Estimation: 24,295
Date of Issue: 2020-07-02
Date of Implementation: 2021-01-02
Regulation (derived from): Announcement No. 29 (2020) of the State Administration for Market Regulation
Issuing agency(ies): State Administration for Market Regulation

JJF 1850-2020: Calibration Specification for Germanium Gamma-ray Spectrometers

---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.
Calibration Specification for Germanium Gamma-ray Spectrometers National Metrology Technical Specifications of the People's Republic of China Calibration specification for germanium γ-ray spectrometer 2020-07-02 released 2021-01-02 implementation Issued by the State Administration for Market Regulation Calibration specification for germanium γ-ray spectrometer Focal point. National Technical Committee on Measurement of Ionizing Radiation Main drafting unit. China Institute of Metrology National Defense Science and Technology Industry Ionizing Radiation Level One Metering Station Shanghai Institute of Metrology and Testing Technology Hubei Fangyuan Environmental Protection Technology Co., Ltd. Participated in the drafting unit. Henan Institute of Metrology This specification entrusts the National Technical Committee for Ionizing Radiation Measurement to be responsible for the interpretation The main drafters of this specification. Liu Haoran (China Institute of Metrology) Diao Lijun (Ionizing Radiation Metering Station for National Defense Technology Industry) Liang Juncheng (Chinese Academy of Metrology) Linfeng He (Shanghai Institute of Metrology and Testing Technology) Jia Weiqiang (Hubei Fangyuan Environmental Protection Technology Co., Ltd.) Participating drafters. Fan Fufu (China Institute of Metrology) Wang Panfeng (Henan Institute of Metrology)

Introduction (Ⅱ) 1 Scope (1) 2 Reference documents (1) 3 Terms and units of measurement (1) 3.1 Term (1) 3.2 Unit of measurement (2) 4 Overview (2) 5 Measurement characteristics (2) 5.1 Energy resolution (2) 5.2 Energy nonlinearity (2) 5.3 Almighty peak relative efficiency (2) 6 Calibration conditions (2) 6.1 Environmental conditions (2) 6.2 Measurement standards (2) 7 Calibration items and calibration methods (3) 7.1 Calibration items (3) 7.2 Calibration method (3) 8 Calibration result expression (4) 9 Re-calibration interval (4) Appendix A Recommended Format of Calibration Record (5) Appendix B Contents of the inner page of the calibration certificate (6) Appendix C Calibration source for energy resolution in different energy regions (7) Appendix D Commonly used energy calibration sources (8) Appendix E Almighty Peak Efficiency Calibration Source (9) Appendix F Uncertainty Evaluation Method of Almighty Peak Efficiency (11) Appendix G Self-absorption correction method (14) Appendix H Use of Calibration Results (18)

Introduction

This specification is compiled in accordance with JJF 1071-2010 "Rules for the Compilation of National Metrology and Calibration Specifications". The compilation of this code mainly refers to JJF 1035-2006 "Terms and Definitions of Ionizing Radiation Measurement", GB/T 4960.6- 2008 "Nuclear Science and Technology Terminology Part 6.Nuclear Instrumentation", GB/T 7167-2008 "Ge γ-ray detection Test Method for Instrument, GB/T 11713-2015 "General Method for γ Energy Spectrum Analysis of High Purity Germanium", IEC 60973-1989 "Test Methods for Germanium Gamma-Ray Detectors" (TestProceduresForGermaniumGamma-RayDetectors) And other technical information. This specification is released for the first time. Calibration specification for germanium γ-ray spectrometer

1 Scope

This specification applies to germanium gamma rays with an energy range of (3~3000) keV and an activity measurement range less than 106Bq Calibration of the spectrometer.

2 Reference documents

The following documents are cited in this specification. JJF 1035-2006 Ionizing radiation measurement terms and definitions GB/T 4960.6-2008 Nuclear Science and Technology Terminology Part 6.Nuclear Instruments GB/T 7167-2008 Germanium γ-ray detector test method GB/T 11713-2015 High-purity germanium γ-energy spectrum analysis general method IEC 60973-1989 Germanium γ-ray detector test method (TestProceduresForGermanium Gamma-RayDetectors) For dated reference documents, only the dated version applies to this specification; for all undated references The latest version (including all amendments) is applicable to this specification.

3 Terms and units of measurement

The following terms and definitions defined by JJF 1035-2006 and GB/T 4960.6-2008 apply to this code. 3.1 Terminology 3.1.1 gamma-ray emission probability The probability of radionuclide decay accompanied by emission of specific energy gamma rays, usually expressed as a percentage. 3.1.2 ful-energypeakefficiency For a given sample (radioactive source)-detector distance, the measured energy is E γ-ray all-energy peak net area meter The ratio of the number of energy gamma rays emitted by the sample (radiation source) in the same time interval. 3.1.3 relative-energy peak efficiency relativeful-energypeakefficiency When the source-detector distance is 25cm, the germanium γ-ray detector and NaI(Tl) scintillation crystal (diameter is The ratio of the total energy peak efficiency of the detector to the 60Co point source 1332.5keV gamma rays. 3.1.4 background A signal not caused by the physical quantity to be measured. In gamma spectrum measurement, it refers to other than the sample to be tested (radioactive source) Other factors include the radioactivity of the detector and the surrounding environment and the spectral data with peaks caused by cosmic rays. 3.1.6 Energy resolution energyresolution The minimum value between the energy of two particles that the detector can distinguish. For a given energy, after deducting the background, use the probe The contribution of the detector to the full width at half maximum (FWHM) of the pulse height distribution (including detector leakage current noise) is characterized by Energy unit representation. 3.1.7 sampleself-absorption The initial gamma photon of a given energy is detected due to scattering or absorption due to the interaction with the material in the sample ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1850-2020_English be delivered?

Answer: Upon your order, we will start to translate JJF 1850-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1850-2020_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1850-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.