In:
EPJ Web of Conferences, EDP Sciences, Vol. 219 ( 2019), p. 10004-
Abstract:
The Alpha-Gamma device at the National Institute of Standards and Technology (NIST) utilizes neutron capture on a totally absorbing 10 B deposit to measure the absolute neutron flux of a monochromatic cold neutron beam. Gammas produced by the boron capture are counted using high purity germanium detectors, which are calibrated using a well-measured 239 Pu alpha source and the alpha-to-gamma ratio from neutron capture on a thin 10 B target. This device has been successfully operated and used to calibrate the neutron flux monitor for the BL2 neutron lifetime experiment at NIST. It is also being used for a measurement of the 6 Li(n,t) 4 He cross section. We shall present its principle of operation along with the current and planned projects involving the Alpha-Gamma device, including the recalibration of the U.S. national neutron standard NBS-1 and (n,f) cross section measurements of 235 U.
Type of Medium:
Online Resource
ISSN:
2100-014X
DOI:
10.1051/epjconf/201921910004
Language:
English
Publisher:
EDP Sciences
Publication Date:
2019
detail.hit.zdb_id:
2595425-8
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