Elsevier

Nuclear Physics A

Volume 477, Issue 1, 1 February 1988, Pages 105-119
Nuclear Physics A

Search for low-energy resonances in 27Al(p, α)24Mg

https://doi.org/10.1016/0375-9474(88)90363-6Get rights and content

Abstract

The known low-energy resonances in 27Al(p, γ)28Si at eR = 203, 223, 293 and 327 keV have been searched for in the 27Al(p, α)24Mg reaction. The observed upper limits for the resonance strength together with the results from previous work show that the MgAl cycle is not closed at all stellar temperatures of interest and that in the important temperature range near T9 = 0.1 the (p, γ) reaction proceeds at least 100 times faster than the (p, α) reaction. The results might be of importance for the explanation of extinct 26Al in meteoritic samples as well as of the 4 solar masses of 26Al found in the interstellar medium via γ-astronomy.

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    Supported in part by the Deutsche Forschungsgemeinschaft (Ro 429/15-2).

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