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 236U∗ compound nucleus, formed in the 235U(d,p) reaction, to the known 235U(n,γ) and (n,f) cross sections. A model-independent method for measuring the γ-channel yield is presented and used.
Copyright © 2009 The American Physical Society. This article first appeared in Physical Review C 79, no. 5 (May 15, 2009): 054610: 1-54610: 9. doi:10.1103/PhysRevC.79.054610.
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Allmond, J., L. Bernstein, C. Beausang, L. Phair, D. Bleuel, J. Burke, J. Escher, K. Evans, B. Goldblum, R. Hatarik, H. Jeppesen, S. Lesher, M. Mcmahan, J. Rasmussen, N. Scielzo, and M. Wiedeking. "Relative 235U(n,γ) and (n,f) Cross Sections from 235U(d,pγ) and (d,pf)." Physical Review C 79, no. 5 (May 15, 2009): 054610: 1-54610: 9. doi:10.1103/PhysRevC.79.054610.