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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Measurement of γ-emission branching ratios for Gd154,156,158 compound nuclei: Tests of surrogate nuclear reaction approximations for (n,γ) cross sections
Physical Review C - Nuclear Physics, Volume 81, No. 3, Article 034608, Year 2010
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Description
The surrogate nuclear reaction method can be used to determine neutron-induced reaction cross sections from measured decay properties of a compound nucleus created using a different reaction and calculated formation cross sections. The reliability of (n,γ) cross sections determined using the Weisskopf-Ewing and ratio approximations are explored for the Gd155,157(n,γ) reactions. Enriched gadolinium targets were bombarded with 22-MeV protons and γ rays were detected in coincidence with scattered protons using the Silicon Telescope Array for Reaction Studies/Livermore- Berkeley Array for Collaborative Experiments (STARS/LiBerACE) silicon and germanium detector arrays. The γ-emission probabilities for the Gd154,156,158 compound nuclei were measured at excitation energies up to 12 MeV. It is found that the approximations yield results that deviate from directly measured Gd155,157(n,γ) cross sections at low energies. To extract reliable cross sections, a more sophisticated analysis should be developed that takes into account angular-momentum differences between the neutron-induced and surrogate reactions. © 2010 The American Physical Society.
Authors & Co-Authors
Scielzo, Nicholas D.
United States, Livermore
Lawrence Livermore National Laboratory
Escher, Jutta E.
United States, Livermore
Lawrence Livermore National Laboratory
Allmond, J. M.
United States, Richmond
University of Richmond
Shamsuzzoha Basunia, M. Shamsuzzoha
United States, Berkeley
Lawrence Berkeley National Laboratory
Beausang, C. W.
United States, Richmond
University of Richmond
Bernstein, Lee A.
United States, Livermore
Lawrence Livermore National Laboratory
Bleuel, Darren L.
United States, Livermore
Lawrence Livermore National Laboratory
Burke, Jason T.
United States, Livermore
Lawrence Livermore National Laboratory
Clark, R. M.
United States, Berkeley
Lawrence Berkeley National Laboratory
Dietrich, Frank S.
United States, Livermore
Lawrence Livermore National Laboratory
Fallon, Paul J.
United States, Berkeley
Lawrence Berkeley National Laboratory
Gibelin, Julien D.
United States, Berkeley
Lawrence Berkeley National Laboratory
Goldblum, Bethany L.
United States, Berkeley
University of California, Berkeley
Lesher, Shelly R.
United States, Livermore
Lawrence Livermore National Laboratory
McMahan, Margaret A.
United States, Berkeley
Lawrence Berkeley National Laboratory
Norman, Eric B.
United States, Livermore
Lawrence Livermore National Laboratory
United States, Berkeley
Lawrence Berkeley National Laboratory
United States, Berkeley
University of California, Berkeley
Phair, Larry W.
United States, Berkeley
Lawrence Berkeley National Laboratory
Sheets, Steven A.
United States, Livermore
Lawrence Livermore National Laboratory
Thompson, Ian J.
United States, Livermore
Lawrence Livermore National Laboratory
Wiedeking, Mathis
United States, Livermore
Lawrence Livermore National Laboratory
United States, Berkeley
Lawrence Berkeley National Laboratory
Statistics
Citations: 56
Authors: 20
Affiliations: 4
Identifiers
Doi:
10.1103/PhysRevC.81.034608
ISSN:
05562813
Research Areas
Cancer
Environmental