Explosive hydrogen burning of 31P

Details Explosive hydrogen burning of 31P Explosive hydrogen burning of 31P

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993nupha.559...83i&link_type=abstract

Nuclear Physics A, Volume 559, Issue 1, p. 83-99.

Physics

Nuclear Physics

18

Scientific paper

Proton threshold states in 32S have been studied via the reactions 31(p, γ)32S, 31P(p, α)28Si and 28Si(α,γ)32S to investigate their influence on a possible SiP cycle in explosive hydrogen burning. One new resonance at Ep = 200 +/-2 keV has been found in the (p, γ) reaction channel, but only upper limits could be deduced for the corresponding (p, α) and (α,γ) resonance strengths. The stellar reaction rates for 31P(p, γ)32S are now experimentally determined for stellar temperatures T9 >= 0.05, whereas the stellar rates for 31P(p, α)28Si still carry large uncertainties for T9 < 0.4. The results of the present work suggest only weak cycling in the SiP mass range at all stellar temperatures of interest.

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