Constraining Neutron Capture Cross Sections for Unstable Nuclei with Surrogate Reaction Data and Theory

Escher, J. E.; Burke, J. T.; Hughes, R. O.; Scielzo, N. D.; Casperson, R. J.; Ota, S.; Park, H. I.; Saastamoinen, A.; Ross, T. J.

doi:10.1103/PhysRevLett.121.052501

Title: Constraining Neutron Capture Cross Sections for Unstable Nuclei with Surrogate Reaction Data and Theory

Journal Article · Tue Jul 31 00:00:00 EDT 2018 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.121.052501· OSTI ID:1529836

Escher, J. E. ^[1]; Burke, J. T. ^[1]; Hughes, R. O. ^[1]; Scielzo, N. D. ^[1]; Casperson, R. J. ^[1]; Ota, S. ^[2]; Park, H. I. ^[2]; Saastamoinen, A. ^[2]; Ross, T. J. ^[3]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Texas A&M Univ., College Station, TX (United States)
Univ. of Richmond, Richmond, VA (United States)

Obtaining reliable data for nuclear reactions on unstable isotopes remains an extremely important task and a formidable challenge. Neutron capture cross sections—crucial ingredients for models of astrophysical processes, national security applications, and simulations of nuclear energy generation—are particularly elusive, as both projectile and target in the reaction are unstable. We demonstrate a new method for determining cross sections for neutron capture on unstable isotopes, using ⁸⁷Y (n , γ) as a prototype. To validate the method, a benchmark experiment is carried out to obtain the known ⁹⁰Zr (n , γ) cross section analogously. Our approach, which employs an indirect (“surrogate”) measurement combined with theory, can be generalized to a larger class of nuclear reactions. It can be used both with traditional stable-beam experiments and in inverse kinematics at rare-isotope facilities.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1529836

Alternate ID(s):: OSTI ID: 1462302

Report Number(s):: LLNL-JRNL-739340; 892772

Journal Information:: Physical Review Letters, Vol. 121, Issue 5; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 23 works

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