Qin JG, An L, Lu XX, Zhu TH, Jiang L, Wang M, Yang B. Note: Calibration of majority isotopes for enriched and depleted uranium fission chambers by using the elimination method with fast neutrons.
THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018;
89:116104. [PMID:
30501325 DOI:
10.1063/1.5052617]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 10/24/2018] [Indexed: 06/09/2023]
Abstract
Calibrated miniature pulse fission chambers (MPFCs) can be used for absolute measurement of the fission reaction rate in neutronic experiments. Absolute measurements require the effective number of fissionable atoms (ENFAs) in the coating of the chambers. An elimination method was proposed to calibrate the MPFCs embodying highly enriched and depleted uranium, using 14.75 MeV fast neutrons from the D-T reaction. The ENFAs of 235U in enriched uranium MPFC and 238U in depleted uranium MPFC are 8.39 × 1018 and 9.55 × 1018, with the uncertainties of 5.27% and 4.76%, respectively.
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