Relative $^{235}\mathrm{U}(n,\ensuremath{\gamma})$ and $(n,f)$ cross sections from $^{235}\mathrm{U}(d,p\ensuremath{\gamma})$ and $(d,\mathit{pf})$

Relative ${}^{235}U (n, γ)$ and $(n, f)$ cross sections from ${}^{235}U (d, p γ)$ and $(d, pf)$

J. M. Allmond, L. A. Bernstein, C. W. Beausang, L. Phair, D. L. Bleuel, J. T. Harke, J. E. Escher, K. E. Evans, B. L. Goldblum, R. Hatarik, H. B. Jeppesen, S. R. Lesher, M. A. McMahan, J. O. Rasmussen, N. D. Scielzo, and M. Wiedeking

Phys. Rev. C 79, 054610 – Published 15 May 2009

Abstract

The internal surrogate ratio method allows for the determination of an unknown cross section, such as $(n, γ)$ , relative to a better-known cross section, such as $(n, f)$ , by measuring the relative exit-channel probabilities of a surrogate reaction that proceeds through the same compound nucleus. The validity of the internal surrogate ratio method is tested by comparing the relative $γ$ and fission exit-channel probabilities of a ${}^{236}U^{*}$ compound nucleus, formed in the ${}^{235}U (d, p)$ reaction, to the known ${}^{235}U (n, γ)$ and $(n, f)$ cross sections. A model-independent method for measuring the $γ$ -channel yield is presented and used.

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Received 17 March 2009

DOI:https://doi.org/10.1103/PhysRevC.79.054610

Authors & Affiliations

J. M. Allmond¹, L. A. Bernstein², C. W. Beausang¹, L. Phair³, D. L. Bleuel², J. T. Harke², J. E. Escher², K. E. Evans⁴, B. L. Goldblum⁴, R. Hatarik^3,5, H. B. Jeppesen³, S. R. Lesher², M. A. McMahan³, J. O. Rasmussen³, N. D. Scielzo², and M. Wiedeking^2,3

¹Department of Physics, University of Richmond, Virginia 23173, USA
²Lawrence Livermore National Laboratory, Livermore, California 94551, USA
³Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
⁴Department of Nuclear Engineering, University of California, Berkeley, California 94720, USA
⁵Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

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Vol. 79, Iss. 5 — May 2009

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Physical Review C

covering nuclear physics

Relative ${}^{235}U (n, γ)$ and $(n, f)$ cross sections from ${}^{235}U (d, p γ)$ and $(d, pf)$

J. M. Allmond, L. A. Bernstein, C. W. Beausang, L. Phair, D. L. Bleuel, J. T. Harke, J. E. Escher, K. E. Evans, B. L. Goldblum, R. Hatarik, H. B. Jeppesen, S. R. Lesher, M. A. McMahan, J. O. Rasmussen, N. D. Scielzo, and M. Wiedeking

Phys. Rev. C 79, 054610 – Published 15 May 2009

Abstract

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Physical Review C

covering nuclear physics

Relative U235(n,γ) and (n,f) cross sections from U235(d,pγ) and (d,pf)

J. M. Allmond, L. A. Bernstein, C. W. Beausang, L. Phair, D. L. Bleuel, J. T. Harke, J. E. Escher, K. E. Evans, B. L. Goldblum, R. Hatarik, H. B. Jeppesen, S. R. Lesher, M. A. McMahan, J. O. Rasmussen, N. D. Scielzo, and M. Wiedeking

Phys. Rev. C 79, 054610 – Published 15 May 2009

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Relative ${}^{235}U (n, γ)$ and $(n, f)$ cross sections from ${}^{235}U (d, p γ)$ and $(d, pf)$