A method for measurement of thermal neutron absorption cross-section in small samples
- 14 May 1981
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 14 (5) , 779-792
- https://doi.org/10.1088/0022-3727/14/5/009
Abstract
Theoretical principles of a method for measuring the absorption cross-section for thermal neutrons are presented in a one-velocity approach. In consecutive measurements the sample investigated is enveloped in shells of a known moderator of varying thickness and irradiated with a pulsed beam of fast neutrons. The die-away rate of thermal neutrons escaping from such a system is measured. The absorption cross-section of the unknown sample is found as the intersection of the experimental curve (die-away rate versus thickness of the moderator) with the theoretical one, calculated for the case when material buckling of the sample is zero.Keywords
This publication has 3 references indexed in Scilit:
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- Some Transient Phenomena in Thermalization I. TheoryNuclear Science and Engineering, 1964
- Two-Group Material Bucklings in a Two-Region SystemNuclear Science and Engineering, 1964