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ASTM E 720 : 2016

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Standard Guide for Selection and Use of Neutron Sensors for Determining Neutron Spectra Employed in Radiation-Hardness Testing of Electronics

Available format(s)

Hardcopy , PDF

Superseded date

04-02-2023

Superseded by

ASTM E 720 : 2023

Language(s)

English

Published date

13-02-2017

€74.48
Excluding VAT

Committee
E 10
DocumentType
Guide
Pages
12
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

1.1This guide covers the selection and use of neutron-activation detector materials to be employed in neutron spectra adjustment techniques used for radiation-hardness testing of electronic semiconductor devices. Sensors are described that have been used at many radiation hardness-testing facilities, and comments are offered in table footnotes concerning the appropriateness of each reaction as judged by its cross-section accuracy, ease of use as a sensor, and by past successful application. This guide also discusses the fluence-uniformity, neutron self-shielding, and fluence-depression corrections that need to be considered in choosing the sensor thickness, the sensor covers, and the sensor locations. These considerations are relevant for the determination of neutron spectra from assemblies such as TRIGA- and Godiva-type reactors and from Californium irradiators. This guide may also be applicable to other broad energy distribution sources up to 20 MeV.

Note 1:For definitions on terminology used in this guide, see Terminology E170.

1.2This guide also covers the measurement of the gamma-ray or beta-ray emission rates from the activation foils and other sensors as well as the calculation of the absolute specific activities of these foils. The principal measurement technique is high-resolution gamma-ray spectrometry. The activities are used in the determination of the energy-fluence spectrum of the neutron source. See Guide E721.

1.3Details of measurement and analysis are covered as follows:

1.3.1Corrections involved in measuring the sensor activities include those for finite sensor size and thickness in the calibration of the gamma-ray detector, for pulse-height analyzer deadtime and pulse-pileup losses, and for background radioactivity.

1.3.2The primary method for detector calibration that uses secondary standard gamma-ray emitting sources is considered in this guide and in Test Methods E181. In addition, an alternative method in which the sensors are activated in the known spectrum of a benchmark neutron field is discussed in Guide E1018.

1.3.3A data analysis method is presented which accounts for the following: detector efficiency; background subtraction; irradiation, waiting, and counting times; fission yields and gamma-ray branching ratios; and self-absorption of gamma rays and neutrons in the sensors.

1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5This 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 and health practices and determine the applicability of regulatory limitations prior to use.

ASTM E 1855 : 2020 Standard Test Method for Use of 2N2222A Silicon Bipolar Transistors as Neutron Spectrum Sensors and Displacement Damage Monitors
ASTM E 1854 : 2019 Standard Practice for Ensuring Test Consistency in Neutron-Induced Displacement Damage of Electronic Parts
ASTM E 2450 : 2023 Standard Practice for Application of CaF<inf>2</inf>(Mn) Thermoluminescence Dosimeters in Mixed Neutron-Photon Environments
ASTM D 1879 : 2006 : R2023 Standard Practice for Exposure of Adhesive Specimens to Ionizing Radiation
ASTM F 980 : 2016 Standard Guide for Measurement of Rapid Annealing of Neutron-Induced Displacement Damage in Silicon Semiconductor Devices
ASTM F 1190 : 2018 Standard Guide for Neutron Irradiation of Unbiased Electronic Components
ASTM E 722 : 2019 Standard Practice for Characterizing Neutron Fluence Spectra in Terms of an Equivalent Monoenergetic Neutron Fluence for Radiation-Hardness Testing of Electronics
ASTM E 265 : 2015 : R2020 Standard Test Method for Measuring Reaction Rates and Fast-Neutron Fluences by Radioactivation of Sulfur-32

ASTM E 1297 : 2008 : R2013 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Niobium
ASTM E 1018 : 2020 Standard Guide for Application of ASTM Evaluated Cross Section Data File
ASTM E 266 : 1992 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Aluminum
ASTM E 264 : 2019 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel
ASTM E 1018 : 2009 : R2013 : EDT 1 Standard Guide for Application of ASTM Evaluated Cross Section Data File
ASTM E 496 : 2014 : EDT 1 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
ASTM E 944 : 1996 Standard Guide for Application of Neutron Spectrum Adjustment Methods in Reactor Surveillance, (IIA)
ASTM E 393 : 1996 Standard Test Method for Measuring Reaction Rates by Analysis of Barium-140 From Fission Dosimeters
ASTM E 264 : 1992 : R1996 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel
ASTM E 721 : 2016 Standard Guide for Determining Neutron Energy Spectra from Neutron Sensors for Radiation-Hardness Testing of Electronics
ASTM E 1297 : 1996 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Niobium
ASTM E 721 : 2022 Standard Guide for Determining Neutron Energy Spectra from Neutron Sensors for Radiation-Hardness Testing of Electronics
ASTM E 261 : 2016 Standard Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques
ASTM E 1018 : 2009 Standard Guide for Application of ASTM Evaluated Cross Section Data File, Matrix E 706 (IIB)
ASTM E 1297 : 2008 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Niobium
ASTM E 496 : 1996 Standard Test Method for Measuring Neutron Fluence Rate and Average Energy From Neutron Generators by Radioactivation Techniques
ASTM E 264 : 1992 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Nickel
ASTM E 1018 : 2009 : R2013 Standard Guide for Application of ASTM Evaluated Cross Section Data File, Matrix E706 (IIB)
ASTM E 1297 : 2018 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Niobium
ASTM E 1018 : 2001 Standard Guide for Application of ASTM Evaluated Cross Section Data File, Matrix E 706 (IIB)
ASTM E 1297 : 2002 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Niobium
ASTM E 704 : 1996 Standard Test Method for Measuring Reaction Rates by Radioactivation of Uranium-238
ASTM E 1018 : 2020 : EDT 1 Standard Guide for Application of ASTM Evaluated Cross Section Data File
ASTM E 705 : 1996 Standard Test Method for Measuring Reaction Rates by Radioactivation of Neptunium-237
ASTM E 261 : 2016 : R2021 Standard Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques
ASTM E 1018 : 1995 Standard Guide for Application of ASTM Evaluated Cross Section Data File, Matrix E 706 (IIB)
ASTM E 266 : 1992 : R1996 Standard Test Method for Measuring Fast-Neutron Reaction Rates by Radioactivation of Aluminum
ASTM E 496 : 2014 : R2022 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

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