ASTM-E496 2022

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

Published By	Publication Date	Number of Pages
ASTM	2022

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Category: ASTM

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Description

ASTM E496-14-Reapproved2022

Active Standard: Standard Test Method for Measuring Neutron Fluence and Average Energy from ³H(d,n)⁴He Neutron Generators by Radioactivation Techniques

ASTM E496

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 ³H(d,n)⁴He 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.

Keywords

14-MeV; DT; neutron activation; neutron generator; neutron metrology;

ICS Code

ICS Number Code 17.240 (Radiation measurements)

DOI: 10.1520/E0496-14R22

Additional information

Standard Title	E496-14(2022) Standard Test Method for Measuring Neutron Fluence and Average Energy from <sup >3</sup>H(d,n)<sup>4</sup>He Neutron Generators by Radioactivation Techniques
Published Code	ASTM
Publication Date	2022