Absolute and Relative Surrogate Measurements of the ²³⁶U(n,f) Cross Section as a Probe of Angular Momentum Effects

Authors

B. F. Lyles
L. A. Bernstein
J. T. Burke
F. S. Dietrich
J. Escher
I. Thompson
D. L. Bleuel
R. M. Clark
P. Fallon
J. Gibelin
A. O. Macchiavelli
M. A. McMahan
L. Phair
E. Rodriguez-Vieitez
M. Wiedeking
C. W. Beausang, University of RichmondFollow
S. R. Lesher
B. Darakchieva
M. Evtimova

DOI

10.1103/PhysRevC.76.014606

Abstract

Using both the absolute and relative surrogate techniques, the ²³⁶U(n,f) cross section was deduced over an equivalent neutron energy range of 0 to 20 MeV. A 42 MeV ³He beam from the 88 Inch Cyclotron at Lawrence Berkeley National Laboratory was used to perform a (³He,α) pickup reaction on targets of ²³⁵U (J^π=7/2⁻) and ²³⁸U (J^π = 0⁺) and the fission decay probabilities were determined. The ²³⁵U(³He,αf) and ²³⁸U(³He,αf) were surrogates for ²³³U(n,f) and ²³⁶U(n,f), respectively. The cross sections extracted using the surrogate method were compared to directly measured cross sections. The sensitivity of these cross sections to the J^π -population distributions was explored.

Document Type

Article

Publication Date

7-10-2007

Publisher Statement

Copyright © 2007 The American Physical Society. This article first appeared in Physical Review C 76, no. 1 (July 10, 2007): 014606: 1-14606: 8. doi:10.1103/PhysRevC.76.014606.

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Recommended Citation

Lyles, B., L. Bernstein, J. Burke, F. Dietrich, J. Escher, I. Thompson, D. Bleuel, R. Clark, P. Fallon, J. Gibelin, A. Macchiavelli, M. McMahan, L. Phair, E. Rodriguez-Vieitez, M. Wiedeking, C. Beausang, S. Lesher, B. Darakchieva, and M. Evtimova. "Absolute and Relative Surrogate Measurements of the ²³⁶U(n,f) Cross Section as a Probe of Angular Momentum Effects." Physical Review C 76, no. 1 (July 10, 2007): 014606: 1-14606: 8. doi:10.1103/PhysRevC.76.014606.