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

Abstract

Using both the absolute and relative surrogate techniques, the {sup 236}U(n,f) cross section was deduced over an equivalent neutron energy range of 0 to 20 MeV. A 42 MeV {sup 3}He beam from the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory was used to perform a ({sup 3}He,{alpha}) pickup reaction on targets of {sup 235}U (J{sup {pi}}=7/2{sup -}) and {sup 238}U (J{sup {pi}}=0{sup +}) and the fission decay probabilities were determined. The {sup 235}U({sup 3}He,{alpha}f) and {sup 238}U({sup 3}He,{alpha}f) were surrogates for {sup 233}U(n,f) and {sup 236}U(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{sup {pi}}-population distributions was explored.

Authors:
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Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
919626
Report Number(s):
UCRL-JRNL-229734
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US0806461
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review C, vol. 76, n/a, July 1, 2007, pp. 014606; Journal Volume: 76
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR MOMENTUM; CROSS SECTIONS; CYCLOTRONS; DECAY; ENERGY RANGE; FISSION; NEUTRONS; PICKUP REACTIONS; PROBES; SENSITIVITY; TARGETS

Citation Formats

Lyles, B, Bernstein, L, Burke, J, Escher, J, Thompson, I, Dietrich, F, Phair, L, Bleuel, D, Gibelin, J, Wiedeking, M, McMahan, M, Rodroguez-Vieitez, E, Clark, R, Macchiavelli, A, Lesher, S, Darakchieva, B, Evtimova, M, Beausang, C, and Fallon, P. Absolute and Relative Surrogate Measurements of the 236U(n,f) Cross Section as a Probe for Angular Momentum Effects. United States: N. p., 2007. Web.
Lyles, B, Bernstein, L, Burke, J, Escher, J, Thompson, I, Dietrich, F, Phair, L, Bleuel, D, Gibelin, J, Wiedeking, M, McMahan, M, Rodroguez-Vieitez, E, Clark, R, Macchiavelli, A, Lesher, S, Darakchieva, B, Evtimova, M, Beausang, C, & Fallon, P. Absolute and Relative Surrogate Measurements of the 236U(n,f) Cross Section as a Probe for Angular Momentum Effects. United States.
Lyles, B, Bernstein, L, Burke, J, Escher, J, Thompson, I, Dietrich, F, Phair, L, Bleuel, D, Gibelin, J, Wiedeking, M, McMahan, M, Rodroguez-Vieitez, E, Clark, R, Macchiavelli, A, Lesher, S, Darakchieva, B, Evtimova, M, Beausang, C, and Fallon, P. Tue . "Absolute and Relative Surrogate Measurements of the 236U(n,f) Cross Section as a Probe for Angular Momentum Effects". United States. doi:. https://www.osti.gov/servlets/purl/919626.
@article{osti_919626,
title = {Absolute and Relative Surrogate Measurements of the 236U(n,f) Cross Section as a Probe for Angular Momentum Effects},
author = {Lyles, B and Bernstein, L and Burke, J and Escher, J and Thompson, I and Dietrich, F and Phair, L and Bleuel, D and Gibelin, J and Wiedeking, M and McMahan, M and Rodroguez-Vieitez, E and Clark, R and Macchiavelli, A and Lesher, S and Darakchieva, B and Evtimova, M and Beausang, C and Fallon, P},
abstractNote = {Using both the absolute and relative surrogate techniques, the {sup 236}U(n,f) cross section was deduced over an equivalent neutron energy range of 0 to 20 MeV. A 42 MeV {sup 3}He beam from the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory was used to perform a ({sup 3}He,{alpha}) pickup reaction on targets of {sup 235}U (J{sup {pi}}=7/2{sup -}) and {sup 238}U (J{sup {pi}}=0{sup +}) and the fission decay probabilities were determined. The {sup 235}U({sup 3}He,{alpha}f) and {sup 238}U({sup 3}He,{alpha}f) were surrogates for {sup 233}U(n,f) and {sup 236}U(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{sup {pi}}-population distributions was explored.},
doi = {},
journal = {Physical Review C, vol. 76, n/a, July 1, 2007, pp. 014606},
number = ,
volume = 76,
place = {United States},
year = {Tue Apr 03 00:00:00 EDT 2007},
month = {Tue Apr 03 00:00:00 EDT 2007}
}