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JJF 1851-2020 English PDF

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US$329.00 · In stock
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JJF 1851-2020: Calibration Specification for Alpha Spectrometers
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1851-2020	329	Add to Cart	3 days	Calibration Specification for Alpha Spectrometers	Valid

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Basic data

Standard ID: JJF 1851-2020 (JJF1851-2020)
Description (Translated English): Calibration Specification for Alpha Spectrometers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A58
Word Count Estimation: 14,197
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 1851-2020: Calibration Specification for Alpha 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.
(Alpha spectrometer calibration specification) National Metrology Technical Specifications of the People's Republic of China Alpha spectrometer calibration specification 2020-07-02 released 2021-01-02 implementation Issued by the State Administration for Market Regulation Alpha spectrometer calibration specification 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 Participating in the drafting. Jiangsu Institute of Metrology Hubei Daqin Weikang Inspection and Certification Co., Ltd. This specification entrusts the National Technical Committee for Ionizing Radiation Measurement to be responsible for the interpretation The main drafters of this specification. Ming Zhang (China Institute of Metrology) Yao Shunhe (Ionizing Radiation Metering Station for National Defense Science and Technology Industry) Tang Fangdong (Shanghai Institute of Metrology and Testing Technology) Participating drafters. Wang Peng (Jiangsu Institute of Metrology) Liang Juncheng (Chinese Academy of Metrology) Liu Haoran (China Institute of Metrology) Qin Mingdong (Hubei Daqin Weikang Inspection and Certification Co., Ltd.)

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(1) 4 Overview (2) 5 Measurement characteristics (2) 5.1 Background count rate (2) 5.2 Energy nonlinearity (2) 5.3 Energy resolution (2) 5.4 Detection efficiency (2) 6 Calibration conditions (2) 6.1 Environmental conditions (2) 6.2 Measurement standards and other equipment (2) 7 Calibration items and calibration methods (3) 7.1 Background count rate(3) 7.2 Energy nonlinearity (3) 7.3 Energy resolution (3) 7.4 Detection efficiency (3) 8 Calibration result expression (4) 9 Recalibration interval (4) Appendix A Recommended Format of Calibration Record (5) Appendix B. Information and recommended format on the inside page of the calibration certificate (6) Appendix C Example of Uncertainty Evaluation of Detection Efficiency Measurement of α Spectrometer (7)

Introduction

JJF 1071-2010 "Rules for the Compilation of National Metrology and Calibration Specifications", JJF 1001-2011 "General Metrology Terms and Definition" and JJF 1059.1-2012 "Evaluation and Expression of Measurement Uncertainty" together constitute the support for the formulation of this specification Foundation. The main basis for the preparation of this specification is the international standard ISO 13161-2011 "Water quality-α energy spectrum method for measuring polonium in water 210 nuclide activity concentration" (Waterquality-Measurement ofpolonium210activityconcentrationin waterbyalphaspectrometry), ISO 13167-2015 ``Water quality-Plutonium, americium, curium and neptunium radionuclides- Alpha Energy Spectrum Measurement Method” (Waterquality-Plutonium, americium, curium and neptunium- Testmethodusingalphaspectrometry) and GB/T 16141-1995 "Radionuclide Alpha Spectrometry" Analysis Method This specification is released for the first time. Alpha spectrometer calibration specification

1 Scope

This specification applies to the calibration of semiconductor detector type alpha spectrometers, with an energy range of (3-9) MeV. For gas The volume detector type alpha spectrometer can be calibrated with reference to the method specified in this specification.

2 Reference documents

This specification refers to the following documents. JJF 1001-2011 General measurement terms and definitions JJF 1035-2006 Ionizing radiation measurement terms and definitions GB/T 4960.1-2010 Nuclear Science and Technology Terminology Part 1.Nuclear Physics and Nuclear Chemistry GB/T 4960.6-2008 Nuclear Science and Technology Terminology Part 6.Nuclear Instruments 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

3.1 Term JJF 1001-2011, JJF 1035-2006, GB/T 4960.1-2010 and GB/T 4960.6-2008 The following terms and definitions apply to this specification. 3.1.1 Alpha spectrometer alphaspectrometer Obtain the energy spectrum of alpha particles, an instrument used for radioactivity measurement and nuclide analysis. 3.1.2 Instrumental background Under the normal working condition of the instrument, the indication value when measuring the empty sample pan without radioactive contamination. 3.1.3 Surface emissivity surfaceemissionrate A specific type of particles with energy exceeding a specific value emitted from the surface of a plane source (2π steradian) per unit time Number of children. 3.1.4 Standard plane source referenceplanesource The properties and activity are known within a certain period of time and can be used as a reference solid planar radioactive source. 3.1.5 Detection efficiency detection efficiency Under certain detection conditions, the ratio of the count rate measured by the detector to the emissivity of the measured source. 3.1.6 Energy resolution energyresolution The ability of the alpha spectrometer to distinguish the energy peaks of the alpha rays with similar energy. 3.2 Unit of measurement 3.2.1 [Source] Surface emissivity. (within 2π steradian of plane source) the number of particles per second, symbol. s-1. 3.2.2 The unit of background count rate is count per hour, symbol. h-1. 3.2.3 The common unit of energy resolution is kiloelectron volts, symbol. keV. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1851-2020_English be delivered?

Answer: Upon your order, we will start to translate JJF 1851-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1851-2020_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1851-2020_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.