Relative proton and γ widths of astrophysically important states in 30S studied in the β-delayed decay of 31Ar
Koldste, G.T., Blank, B., Borge, M.J.G., Briz, J.A., Carmona-Gallardo, M., Fraile, L.M., Fynbo, H.O.U., Giovinazzo, J., Johansen, J.G., Jokinen, A., Jonson, B., Kurturkian-Nieto, T., Kusk, J.H., Nilsson, T., Perea, A., Pesudo, V., Picado, E., Riisager, K., Saastamoinen, A., . . . Walle, J. V. D. (2013). Relative proton and γ widths of astrophysically important states in 30S studied in the β-delayed decay of 31Ar. Physical Review C, 87(5), Article 055808. https://doi.org/10.1103/PhysRevC.87.055808
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2013Copyright
© 2013 American Physical Society. Published in this repository with the kind permission of the publisher.
Resonances just above the proton threshold in 30S affect the 29P(p, γ )
30S reaction under astrophysical
conditions. The (p,γ )-reaction rate is currently determined indirectly and depends on the properties of the
relevant resonances. We present here a method for finding the ratio between the proton and γ partial widths of
resonances in 30S. The widths are determined from the β2p- and βpγ -decay of 31Ar, which is produced at the
ISOLDE radioactive ion beam facility at the European research organization CERN. Experimental limits on
the ratio between the proton and γ partial widths for astrophysical relevant levels in 30S have been found for
the first time. A level at 4689.2(24) keV is identified in the γ spectrum, and an upper limit on the p/ γ ratio of
0.26 (95% C.L.) is found. In the two-proton spectrum two levels at 5227(3) keV and 5847(4) keV are identified.
These levels were previously seen to γ decay and upper limits on the γ / p ratio of 0.5 and 9, respectively,
(95% C.L.) are found, where the latter differs from previous calculations.
...
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American Physical SocietyISSN Search the Publication Forum
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