Suppression of complete fusion due to breakup in the reactions {sup 10,11}B+{sup 209}Bi

Journal Article · Sun Mar 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.034605· OSTI ID:21199621

Gasques, L R; Hinde, D J; Dasgupta, M; Mukherjee, A; Thomas, R G ^[1]

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1. Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200 (Australia)

Above-barrier cross sections of fission and {alpha}-active heavy reaction products were measured for the reactions of {sup 10,11}B with {sup 209}Bi. Systematic analysis showed that the fission originates almost exclusively from complete fusion (CF). Existing measurements of above-barrier fusion products for the {sup 30}Si+{sup 186}W reaction, assumed to proceed exclusively through CF, were extrapolated to the current systems using statistical model calculations. This extrapolation showed that the heavy reaction products from the {sup 10,11}B+{sup 209}Bi reactions include substantial components from incomplete fusion as well as from CF. Compared with fusion calculations without breakup, the CF cross sections are suppressed by 15% for {sup 10}B and 7% for {sup 11}B. A consistent and systematic variation of the suppression of CF for reactions of the weakly bound nuclei {sup 6,7}Li, {sup 9}Be, and {sup 10,11}B on targets of {sup 208}Pb and {sup 209}Bi is found as a function of the breakup threshold energy.

• OSTI ID: 21199621
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BERYLLIUM 9
BISMUTH 209 TARGET
BORON 10
BORON 11
CROSS SECTIONS
CURRENTS
EXTRAPOLATION
FISSION
LEAD 208 TARGET
LITHIUM 6
LITHIUM 7
NUCLEAR REACTIONS
SILICON 30
STATISTICAL MODELS
THRESHOLD ENERGY
TUNGSTEN 186