DOI
10.1103/PhysRevC.85.024613
Abstract
The surrogate ratio method has been tested for (p,d) and (p,t) reactions on uranium nuclei. 236U and 238U targets were bombarded with 28-MeV protons and the light ion recoils and fission fragments were detected using the Silicon Telescope Array for Reaction Studies detector array at the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory. The (p,df) reaction channels on 236U and 238U targets were used as a surrogate to determine the σ[236U(n,f)]/σ[234U(n,f)] cross-section ratio. The (p,tf) reaction channels were also measured with the same targets as a surrogate for the σ[235U(n,f)]/σ[(233U(n,f)] ratio. For the (p,df) and (p,tf) surrogate measurements, there is good agreement with accepted (n,f) values over equivalent neutron energy ranges of En=0–7 MeV and En=0–5.5 MeV, respectively. An internal surrogate ratio method comparing the (p,d) and (p,t) reaction channels on a single target is also discussed. The σ[234U(n,f)]/σ[233U(n,f)] and σ[236U(n,f)]/σ[235U(n,f)] cross-section ratios are extracted using this method for the 236U and 238U targets, respectively. The resulting fission cross-section ratios show relatively good agreement with accepted values up to En∼5 MeV.
Document Type
Article
Publication Date
2-21-2012
Publisher Statement
Copyright © 2012 The American Physical Society. This article first appeared in Physical Review C 85, no. 2 (February 21, 2012): 024613: 1-24613: 8. doi:10.1103/PhysRevC.85.024613.
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Recommended Citation
Hughes, R., C. Beausang, T. Ross, J. Burke, N. Scielzo, M. Basunia, C. Campbell, R. Casperson, H. Crawford, J. Escher, J. Munson, L. Phair, and J. Ressler. "Utilizing (p,d) and (p,t) Reactions to Obtain (n,f) Cross Sections in Uranium Nuclei Via the Surrogate-Ratio Method." Physical Review C 85, no. 2 (February 21, 2012): 024613: 1-24613: 8. doi:10.1103/PhysRevC.85.024613.