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Title: Determining the average prompt-fission-neutron multiplicity for Pu 239 ( n , f ) via a Pu 240 ( α , α' f ) surrogate reaction

Abstract

The average prompt-fission-neutron multiplicity ν ¯ is of significance in the areas of nuclear theory, nuclear nonproliferation, and nuclear energy. In this work, the surrogate-reaction method has been used for the first time to indirectly determine ν ¯ for Pu 239 ( n , f ) via Pu 240 ( α , α' f ) reactions. A Pu 240 target was bombarded with a beam of 53.9-MeV α particles. Scattered α particles, fission products, and neutrons were measured with the NeutronSTARS detector array. Values of ν ¯ were obtained for a continuous range of equivalent incident neutron energies between 0.25 and 26.25 MeV, and the results agree well with direct neutron measurements.

Authors:
ORCiD logo [1];  [1];  [2];  [1];  [1];  [1];  [1];  [3];  [4];  [4]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Berkeley, CA (United States)
  3. Univ. of California, Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Texas A & M Univ., College Station, TX (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1604290
Report Number(s):
LLNL-JRNL-773338
Journal ID: ISSN 2469-9985; PRVCAN; 965114; TRN: US2104207
Grant/Contract Number:  
AC52-07NA27344; NA0000979; NA0003180
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 100; Journal Issue: 6; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; fission; H & He induced nuclear reactions; nuclear reactions; nucleon induced nuclear reactions

Citation Formats

Wang, B. S., Harke, J. T., Akindele, O. A., Casperson, R. J., Hughes, R. O., Koglin, J. D., Kolos, K., Norman, E. B., Ota, S., and Saastamoinen, A. Determining the average prompt-fission-neutron multiplicity for Pu239(n,f) via a Pu240(α,α'f) surrogate reaction. United States: N. p., 2019. Web. doi:10.1103/PhysRevC.100.064609.
Wang, B. S., Harke, J. T., Akindele, O. A., Casperson, R. J., Hughes, R. O., Koglin, J. D., Kolos, K., Norman, E. B., Ota, S., & Saastamoinen, A. Determining the average prompt-fission-neutron multiplicity for Pu239(n,f) via a Pu240(α,α'f) surrogate reaction. United States. https://doi.org/10.1103/PhysRevC.100.064609
Wang, B. S., Harke, J. T., Akindele, O. A., Casperson, R. J., Hughes, R. O., Koglin, J. D., Kolos, K., Norman, E. B., Ota, S., and Saastamoinen, A. Mon . "Determining the average prompt-fission-neutron multiplicity for Pu239(n,f) via a Pu240(α,α'f) surrogate reaction". United States. https://doi.org/10.1103/PhysRevC.100.064609. https://www.osti.gov/servlets/purl/1604290.
@article{osti_1604290,
title = {Determining the average prompt-fission-neutron multiplicity for Pu239(n,f) via a Pu240(α,α'f) surrogate reaction},
author = {Wang, B. S. and Harke, J. T. and Akindele, O. A. and Casperson, R. J. and Hughes, R. O. and Koglin, J. D. and Kolos, K. and Norman, E. B. and Ota, S. and Saastamoinen, A.},
abstractNote = {The average prompt-fission-neutron multiplicity ν¯ is of significance in the areas of nuclear theory, nuclear nonproliferation, and nuclear energy. In this work, the surrogate-reaction method has been used for the first time to indirectly determine ν¯ for Pu239(n,f) via Pu240(α,α'f) reactions. A Pu240 target was bombarded with a beam of 53.9-MeV α particles. Scattered α particles, fission products, and neutrons were measured with the NeutronSTARS detector array. Values of ν¯ were obtained for a continuous range of equivalent incident neutron energies between 0.25 and 26.25 MeV, and the results agree well with direct neutron measurements.},
doi = {10.1103/PhysRevC.100.064609},
journal = {Physical Review C},
number = 6,
volume = 100,
place = {United States},
year = {Mon Dec 23 00:00:00 EST 2019},
month = {Mon Dec 23 00:00:00 EST 2019}
}

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