ASTM E496-02
Historical Standard: ASTM E496-02 Standard Test Method for Measuring Neutron Fluence and Average Energy from 3 H( d,n ) 4 He Neutron Generators by Radioactivation Techniques 1
SUPERSEDED (see Active link, below)
ASTM E496
1. 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 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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
E170 Terminology Relating to Radiation Measurements and Dosimetry
E181 Test Methods for Detector Calibration and Analysis of Radionuclides
E261 Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques
E265 Test Method for Measuring Reaction Rates and Fast-Neutron Fluences by Radioactivation of Sulfur-32
E720 Guide for Selection and Use of Neutron Sensors for Determining Neutron Spectra Employed in Radiation-Hardness Testing of Electronics
International Commission on Radiation Units and Measurements (ICRU) Reports
ICRUReport26N Dosimetry for Biology and MedicineISO Standard
GuidetotheExpressionNIST Document
TechnicalNote1297&md for Evaluating and Expressing the Uncertainty of NIST Measurement ResultsKeywords
14-MeV; DT; neutron activation; neutron generator; neutron metrology
; Neutron activation reactions; Neutron flux/fluence; Radioactivation--fast neutron flux; Threshold detectors--14 MeV; Fast neutron flux/fluence; Fluence;
ICS Code
ICS Number Code 17.240 (Radiation measurements); 27.120.30 (Fissile materials and nuclear fuel technology)
DOI: 10.1520/E0496-02
ASTM International is a member of CrossRef.
