Prompt neutron emission in the neutron-induced fission of ²³⁹Pu and the spontaneous fission of ²⁵²Cf: an unfolding story

Technical Report · Thu Sep 06 04:00:00 EDT 2018

DOI:https://doi.org/10.2172/1476229· OSTI ID:1476229

Wu, C. Y. ^[1]; Henderson, J. ^[1]; Henderson, R. A. ^[1]; Devlin, M. ^[2]; Kelly, K. J. ^[2]; Gomez, J. A. ^[2]; Haight, R. C. ^[2]; Taddeucci, T. N. ^[2]; O'Donnell, J. M. ^[2]; Mosby, S. M. ^[2]; Fotiades, N. ^[2]; Ulmann, J. L. ^[2]; White, M. ^[2]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Prompt neutron emission is one of the major observables in fission and critical to a sustained chain reaction. The prompt neutron emission spectrum and its precision are essential for adequately modeling the chain reaction for any given application. Within this context, a joint program, called Chi-Nu, was initiated by LANL [1] with the objective to improve the precision of experimental measurements of prompt neutron emission for neutron-induced fission of ²³⁵U and ²³⁹Pu as well as the spontaneous fission of ²⁵²Cf. The measurements were carried out at the Weapons Neutron Research Facility at Los Alamos Neutron Science Center using two scintillator arrays for neutron detection and a PPAC (parallel-plate avalanche counter) for fission-fragment detection.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC52-07NA27344
• OSTI ID: 1476229
• Report Number(s): LLNL-TR--758082; 945877
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS