11C level structure via the 10B(p, γ) reaction

Details 11C level structure via the 10B(p, γ) reaction 11C level structure via the 10B(p, γ) reaction

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phrvc..28.1431w&link_type=abstract

Physical Review C (Nuclear Physics), Volume 28, Issue 4, October 1983, pp.1431-1442

Physics

Nuclear Physics

14

Scientific paper

The reaction 10B(p, γ)11C has been investigated in the energy range Ep=0.07-2.20 MeV. The broad resonant structure previously observed in the ground state transition near Ep=1.2 MeV has been seen also in γ-ray transitions to excited states. The observed excitation functions as well as the γ-ray angular distributions can be explained by assuming several broad overlapping resonances. The low-energy data (Ep<0.6 MeV) reveal the existence of two s-wave resonances at Ep=0.010 and 0.56 MeV. Spectroscopic factors for several final states have been obtained from observation of direct capture processes to them; they are in fair agreement with results from stripping reaction studies. The present data also provide information on partial and total widths of the states at Ex=8-9 MeV. The energy range investigated corresponds to the temperature range of T=(0.01-5)×109 K. The thermonuclear reaction rates deduced from the present results are compared with previously reported values. NUCLEAR REACTIONS 10B(p, γ), Ep=0.07-2.20 MeV; measured γ yield for 11C states up to Ex=10.7 MeV. Deduced resonance parameters, branching ratios, and direct capture contributions for proton-unbound states; deduced spectroscopic factors, ΓγΓtot, and Γtot for several α-unbound states. Calculated thermonuclear reaction rate for T=(0.01-5)×109 K.

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