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Title: Benchmarking the External Surrogate Ratio Method using the (alpha,alpha' f) reaction at STARS

Abstract

We measured the ratio of the fission probabilities of {sup 234}U* relative to {sup 236}U* formed via an ({alpha},{alpha}{prime}) direct reactions using the STARS array at the 88-inch cyclotron at the Lawrence Berkeley National Laboratory. This ratio has a shape similar to the ratio of neutron capture probabilities from {sup 233}U(n; f) and {sup 235}U(n; f), indicating the alpha reactions likely formed a compound nucleus. This result indicates that the ratios of fission exit channel probabilities for two actinide nuclei populated via ({alpha}, {alpha}{prime}) can be used to determine an unknown fission cross section relative to a known one. The validity of the External Surrogate Ratio Method (ESRM) is tested and the results support the conclusions of Burke et al. [1].

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
926073
Report Number(s):
LLNL-PROC-400514
TRN: US0802493
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: CNR 2007, Yosemite, CA, United States, Oct 22 - Oct 26, 2007
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ACTINIDE NUCLEI; ALPHA REACTIONS; CAPTURE; CROSS SECTIONS; CYCLOTRONS; DIRECT REACTIONS; FISSION; NEUTRON REACTIONS; SHAPE

Citation Formats

Lesher, S R, Bernstein, L A, Ai, H, Beausang, C W, Bleuel, D, Burke, J T, Clark, R M, Fallon, P, Gibelin, J, Lee, I Y, Lyles, B F, Macchiavelli, A O, McMahan, M A, Moody, K J, Norman, E B, Phair, L, Rodriguez-Vieitez, E, and Wiedeking, M. Benchmarking the External Surrogate Ratio Method using the (alpha,alpha' f) reaction at STARS. United States: N. p., 2008. Web.
Lesher, S R, Bernstein, L A, Ai, H, Beausang, C W, Bleuel, D, Burke, J T, Clark, R M, Fallon, P, Gibelin, J, Lee, I Y, Lyles, B F, Macchiavelli, A O, McMahan, M A, Moody, K J, Norman, E B, Phair, L, Rodriguez-Vieitez, E, & Wiedeking, M. Benchmarking the External Surrogate Ratio Method using the (alpha,alpha' f) reaction at STARS. United States.
Lesher, S R, Bernstein, L A, Ai, H, Beausang, C W, Bleuel, D, Burke, J T, Clark, R M, Fallon, P, Gibelin, J, Lee, I Y, Lyles, B F, Macchiavelli, A O, McMahan, M A, Moody, K J, Norman, E B, Phair, L, Rodriguez-Vieitez, E, and Wiedeking, M. 2008. "Benchmarking the External Surrogate Ratio Method using the (alpha,alpha' f) reaction at STARS". United States. https://www.osti.gov/servlets/purl/926073.
@article{osti_926073,
title = {Benchmarking the External Surrogate Ratio Method using the (alpha,alpha' f) reaction at STARS},
author = {Lesher, S R and Bernstein, L A and Ai, H and Beausang, C W and Bleuel, D and Burke, J T and Clark, R M and Fallon, P and Gibelin, J and Lee, I Y and Lyles, B F and Macchiavelli, A O and McMahan, M A and Moody, K J and Norman, E B and Phair, L and Rodriguez-Vieitez, E and Wiedeking, M},
abstractNote = {We measured the ratio of the fission probabilities of {sup 234}U* relative to {sup 236}U* formed via an ({alpha},{alpha}{prime}) direct reactions using the STARS array at the 88-inch cyclotron at the Lawrence Berkeley National Laboratory. This ratio has a shape similar to the ratio of neutron capture probabilities from {sup 233}U(n; f) and {sup 235}U(n; f), indicating the alpha reactions likely formed a compound nucleus. This result indicates that the ratios of fission exit channel probabilities for two actinide nuclei populated via ({alpha}, {alpha}{prime}) can be used to determine an unknown fission cross section relative to a known one. The validity of the External Surrogate Ratio Method (ESRM) is tested and the results support the conclusions of Burke et al. [1].},
doi = {},
url = {https://www.osti.gov/biblio/926073}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 09 00:00:00 EST 2008},
month = {Wed Jan 09 00:00:00 EST 2008}
}

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