High-precision (p,t) reaction to determine Al25(p,γ)Si26 reaction rates

Details High-precision (p,t) reaction to determine Al25(p,γ)Si26 reaction rates High-precision (p,t) reaction to determine Al25(p,γ)Si26 reaction rates

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010phrvc..82b5807m&link_type=abstract

Physical Review C, vol. 82, Issue 2, id. 025807

Physics

Nuclear Physics

8

Transfer Reactions, Explosive Burning In Accreting Binary Systems, Nuclear Physics Aspects Of Novae, Supernovae, And Other Explosive Environments, 20<=A<=38

Scientific paper

Since the identification of ongoing Al26 production in the universe, the reaction sequence Mg24(p,γ)Al25(β+ν)Mg25(p,γ)Al26 has been studied intensively. At temperatures where the radiative capture on Al25 (t1/2=7.2 s) becomes faster than the β+ decay, the production of Al26 can be reduced due to the depletion of Al25. To determine the resonances relevant for the Al25(p,γ)Si26 bypass reaction, we measured the Si28(p,t)Si26 reaction with high-energy precision using the Grand Raiden spectrometer at the Research Center for Nuclear Physics, Osaka. Several new energy levels were found above the p threshold and for known states excitation energies were determined with smaller uncertainties. The calculated stellar rates of the bypass reaction agree well with previous results, suggesting that these rates are well established.

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