Systematic analysis of above-barrier fusion of {sup 9,10,11}Be+{sup 209}Bi

Journal Article · Tue Jun 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.064611· OSTI ID:21388615

Hinde, D J; Dasgupta, M ^[1]

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

Measurements of fusion for {sup 9,10,11}Be allow testing of the relative importance to fusion and breakup of the alpha-cluster structure found in all these Be isotopes, compared with the neutron-halo structure only present for {sup 11}Be. However, disagreements exist among different published experimental data sets for the reactions of {sup 9,10,11}Be with {sup 209}Bi. Accurate measurements of above-barrier cross sections for the products of complete fusion (fission and evaporation residues) in the reaction of {sup 9}Be with {sup 209}Bi and {sup 208}Pb provide the basis for a reanalysis of above-barrier fusion for {sup 10,11}Be+{sup 209}Bi. This includes procedures making full use of the higher precision stable beam data and resolves many of the disagreements. The improved self-consistency of the analysis allows investigation of the experimental average fusion barriers. Although showing some scatter, these suggest a higher barrier for the neutron halo nucleus {sup 11}Be. Comparison of published cross sections for fusion associated with capture of all the charge of the projectile suggest that all these Be isotopes show significant suppression of complete fusion, a surprising result given that the alpha-breakup threshold energies are 1.57 MeV for {sup 9}Be but over 7 MeV for {sup 10,11}Be. Further experimental studies to investigate in more detail the division between complete and incomplete fusion for reactions of {sup 10,11}Be are needed.

• OSTI ID: 21388615
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ALKALINE EARTH ISOTOPES
BEAMS
BERYLLIUM 10
BERYLLIUM 11
BERYLLIUM 9
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BISMUTH 209
BISMUTH ISOTOPES
CAPTURE
COMPARATIVE EVALUATIONS
CROSS SECTIONS
ENERGY
ENERGY RANGE
EVALUATION
EVAPORATION
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FISSION
HEAVY NUCLEI
ISOTOPES
LEAD 208
LEAD ISOTOPES
LIGHT NUCLEI
MEV RANGE
MEV RANGE 01-10
NUCLEAR HALOS
NUCLEAR REACTIONS
NUCLEI
NUCLEOSYNTHESIS
ODD-EVEN NUCLEI
PHASE TRANSFORMATIONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
SYNTHESIS
TESTING
THERMONUCLEAR REACTIONS
THRESHOLD ENERGY
YEARS LIVING RADIOISOTOPES