In the Surrogate Method, the measured decay probability of a compound nucleus formed via a direct reaction is used to extract the cross section for a reaction with a different entrance channel that proceeds through the same compound nucleus. An extension of the Surrogate Method, the Surrogate Ratio Method (SRM), uses a ratio of measured decay probabilities to infer an unknown cross section relative to a known one. To test the SRM we compare the direct-reaction-induced fission probability ratio of 234U(α, α’ f ) to 236U(α, α’f ) with the ratio of cross sections of 233U(n, f ) to 235U(n, f ). These ratios were found to be in agreement over an equivalent neutron energy range of 0.4–18 MeV.
Copyright © 2009 The American Physical Society. This article first appeared in Physical Review C 79, no. 4 (April 29, 2009): 044609: 1-44609: 7. doi:10.1103/PhysRevC.79.044609.
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Lesher, S., J. Burke, L. Bernstein, H. Ai, C. Beausang, D. Bleuel, R. Clark, F. Dietrich, J. Escher, P. Fallon, J. Gibelin, B. Goldblum, I. Lee, A. Macchiavelli, M. Mcmahan, K. Moody, E. Norman, L. Phair, E. Rodriguez-Vieitez, N. Scielzo, and M. Wiedeking. "Surrogate Ratio Method in the Actinide Region Using the (α,α'f) Reaction." Physical Review C 79, no. 4 (April 29, 2009): 044609: 1-44609: 7. doi:10.1103/PhysRevC.79.044609.