JJF 1702-2018 English PDF

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JJF 1702-2018: Calibration Specification for α, β Planes Source
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Basic data

Standard ID: JJF 1702-2018 (JJF1702-2018)
Description (Translated English): Calibration Specification for ��, �� Planes Source
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A58
Word Count Estimation: 14,196
Date of Issue: 2018-02-27
Date of Implementation: 2018-08-27
Older Standard (superseded by this standard): JJG 788-1992
Regulation (derived from): AQSIQ Announcement No. 26 of 2018
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine

JJF 1702-2018: Calibration Specification for α, β Planes Source

---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.
(α, β plane source calibration specification) National Metrology Technical Specification of the People's Republic α, β plane source calibration specification CalibrationSpecificationforα, βPlanesSource Published on.2018-02-27 2018-08-27 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued α, β plane source calibration specification α, β PlanesSources Replace JJG788-1992 Focal Point. National Ionizing Radiation Measurement Technical Committee Drafting unit. Shanghai Institute of Metrology and Testing Technology China Institute of Metrology This Code entrusts the National Ionizing Radiation Measurement Technical Committee to explain Drafters of this specification. Tang Fangdong (Shanghai Institute of Metrology and Testing Technology) He Linfeng (Shanghai Institute of Metrology and Testing Technology) Liang Shucheng (China Institute of Metrology) Xu Yihe (Shanghai Institute of Metrology and Testing Technology) Zhang Ming (China Institute of Metrology) Liu Yuran (China Institute of Metrology)

table of Contents

Introduction (II) 1 Scope (1) 2 References (1) 3 terms and units of measurement (1) 3.1 Terminology (1) 3.2 Unit of measurement (1) 4 Overview (1) 5 Measurement characteristics (1) 5.1 Surface emissivity (1) 5.2 Surface emissivity non-uniformity (2) 6 Calibration conditions (2) 6.1 Environmental conditions (2) 6.2 Measurement Standards (2) 7 Calibration items and calibration methods (2) 7.1 Surface emissivity (2) 7.2 Surface emissivity non-uniformity (3) 8 calibration result expression (4) 9 re-study interval (4) Appendix A Recommended Format for α, β Planar Source Calibration Record (5) Appendix B Contents of the α, β plane source calibration certificate (6) Appendix C Example of Uncertainty Evaluation of β Plane Source Surface Emissivity Calibration Results (7)

Introduction

This specification was prepared in accordance with JJF 1071-2010 “Rules for the Preparation of National Metrology Calibration Specifications”. Compared with JJG788-1992, in addition to editorial changes, the main technical changes of this specification are as follows. --- Changed from the verification procedure to the calibration specification; --- Name changed from "α, β standard plane source" to "α, β plane source calibration specification"; --- Modify the original surface verification project "surface emissivity and activity" to the calibration project "surface emissivity"; --- Increase the definition of the energy range of β particles in the scope of application; --- Planar source surface emissivity calculation is modified from absolute measurement to apply to absolute and relative measurements Way of calculation; --- Delete the original program verification project "radioactive contamination of inactive surfaces"; --- Modified the measurement conditions and calculation methods for the non-uniformity of the surface plane source emissivity. The previous releases of this specification are as follows. JJG788-1992. α, β plane source calibration specification

1 Scope

This specification applies to the α-plane source and surface emissivity of the surface emissivity (102~106) min-1 (103~ 106) Calibration of the beta plane source of min-1, the maximum energy of the beta particles is greater than or equal to 150 keV.

2 reference files

This specification refers to the following documents. JJF 1001-2011 General Measurement Terms and Definitions GB/T 4960.1-2010 Nuclear Science and Technology Terms - Part 1. Nuclear Physics and Nuclear Chemistry For dated references, only dated versions apply to this specification; undated quotations The latest version (including all amendments) applies to this specification.

3 terms and units of measure

3.1 Terminology The terms and definitions defined by JJF 1001-2011 and GB/T 4960.1-2010 and the following terms apply to this specification. 3.1.1 Plane source planesource A plate-shaped radioactive source with a substrate. 3.1.2 [source] surface emissivity surfaceemissionrate A specific type of particle that emits more than a specific value from a planar source surface (2π steradian) per unit time Child number. 3.2 Unit of measurement [Source] Surface emissivity. (number of particles per minute in the plane source 2π spheroid); symbol. min-1.

4 Overview

The alpha, beta planar source is deposited or bonded by a quantity of alpha or beta radionuclide to a metal substrate of defined shape and area. Made on the surface, usually the radionuclide is evenly distributed on one side, and the thickness of the substrate is sufficient to prevent emission from the back side of the source particle. The α, β plane sources are commonly used for the measurement of radioactivity and the calibration, calibration and stabilization of radioactive contamination monitoring instruments. Sex test.

5 Measurement characteristics

5.1 Surface emissivity The surface emissivity of commonly used α, β plane sources is usually (102~106) min-1, α, β standard plane source The uncertainty of surface emissivity is better than 5% (k=2). ......

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