ASTM E496-14(2022)
Standard Test Method for Measuring Neutron Fluence and Average Energy from ³H(d,n)⁴He Neutron Generators by Radioactivation Techniques

Standard No.

ASTM E496-14(2022)

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E496-14(2022)

Scope

1.1 This test method covers a general procedure for the measurement of the fast-neutron fluence rate produced by neutron generators utilizing the 3 H(d,n)4 He reaction. Neutrons so produced are usually referred to as 14-MeV neutrons, but range in energy depending on a number of factors. This test method does not adequately cover fusion sources where the velocity of the plasma may be an important consideration. 1.2 This test method uses threshold activation reactions to determine the average energy of the neutrons and the neutron fluence at that energy. At least three activities, chosen from an appropriate set of dosimetry reactions, are required to characterize the average energy and fluence. The required activities are typically measured by gamma-ray spectroscopy. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM E496-14(2022) Referenced Document

• ASTM E170 Standard Terminology Relating to Radiation Measurements and Dosimetry
• ASTM E181 Standard Test Methods for Detector Calibration and Analysis of Radionuclides
• ASTM E261 Standard Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques
• ASTM E265 Standard Test Method for Measuring Reaction Rates and Fast-Neutron Fluences by Radioactivation of Sulfur-32
• ASTM E720 Standard Guide for Selection and Use of Neutron-Activation Foils for Determining Neutron Spectra Employed in Radiation-Hardness Testing of Electronics

ASTM E496-14(2022) history

• 2022 ASTM E496-14(2022) Standard Test Method for Measuring Neutron Fluence and Average Energy from ³H(d,n)⁴He Neutron Generators by Radioactivation Techniques
• 2014 ASTM E496-14e1 Standard Test Method for Measuring Neutron Fluence and Average Energy from?³H40;d,n41; ⁴He Neutron Generators by Radioactivation Techniques
• 2014 ASTM E496-14 Standard Test Method for Measuring Neutron Fluence and Average Energy from?³H40;d,n41; ⁴He Neutron Generators by Radioactivation Techniques
• 2009 ASTM E496-09 Standard Test Method for Measuring Neutron Fluence and Average Energy from ³H(d,n)⁴He Neutron Generators by Radioactivation Techniques ¹
• 2002 ASTM E496-02 Standard Test Method for Measuring Neutron Fluence and Average Energy from ³H(d,n)⁴He Neutron Generators by Radioactivation Techniques ¹
• 1996 ASTM E496-96 Standard Test Method for Measuring Neutron Fluence Rate and Average Energy From Neutron Generators by Radioactivation Techniques