Explosive hydrogen burning of 35Cl

Physics – Nuclear Physics

Scientific paper

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Nuclear Reactions

Scientific paper

Proton threshold states in 36Ar have been studied via the reactions 35Cl(3He, d)36Ar, 32S(6Li, d)36Ar, 32S(α, γ)36Ar, 35Cl(p, γ)36Ar and 35Cl(p, α)32S to investigate their influence on a possible SC1 reaction cycle in explosive hydrogen burning. Three new states in 36Ar have been observed in the (3He, d) reaction at Ex = 8806, 8887 and 8923 keV. Deuteron angular distributions were measured for 14 states near the 35Cl+p threshold and were analyzed with DWBA calculations. Values of transferred orbital angular momenta, spectroscopic factors and proton partial widths were determined. Gamma-ray spectra have been measured at ten (p, γ) resonances. Three new resonances were observed at ER = 311, 416 and 627 keV, corresponding to 36Ar states at Ex = 8806, 8909 and 9117 keV, respectively. Excitation and resonance energies, γ-ray branching ratios and resonance strengths are presented. The astrophysical implications of our results for explosive hydrogen burning of 35Cl are discussed.

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