Structure of resonances in the Gamow burning window for the Al25(p,γ)Si26 reaction in novae

Doherty, D. T.; Woods, P. J.; Seweryniak, D.; Albers, M.; Ayangeakaa, A. D.; Carpenter, M. P.; Chiara, C. J.; David, H. M.; Harker, J. L.; Janssens, R. V.  F.; Kankainen, A.; Lederer, C.; Zhu, S.

doi:10.1103/PhysRevC.92.035808

Title: Structure of resonances in the Gamow burning window for the ${}^{25}{Al} (p, γ) {}^{26}{Si}$ reaction in novae

Journal Article · Tue Sep 01 00:00:00 EDT 2015 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.92.035808· OSTI ID:1391898

Doherty, D. T.; Woods, P. J.; Seweryniak, D.; Albers, M.; Ayangeakaa, A. D.; Carpenter, M. P.; Chiara, C. J.; David, H. M.; Harker, J. L.; Janssens, R. V. F.; Kankainen, A.; Lederer, C.; Zhu, S.

A -ray spectroscopy study of excited states in 26Si has been performed using the 24Mg(3He,n) reaction at a beam energy of 10 MeV. In particular, states have been studied above the proton threshold relevant for burning in the 25Al(p, )26Si reaction in novae. This reaction in uences the amount of 26Al injected into the interstellar medium by novae, which contributes to the overall ux of cosmic gamma-ray emission from 26Al observed in satellite missions. The present results point strongly to the existence of a 0+ state at an excitation energy of 5890 keV lying within the Gamow burning window, which raises questions about the existence and properties of another, higher-lying state/resonance reported in previous experimental work. The existence of two such states within this excitation energy region cannot be understood in the framework of sd shell-model calculations.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science - Office of Nuclear Physics

DOE Contract Number:: AC02-06CH11357

OSTI ID:: 1391898

Journal Information:: Physical Review. C, Nuclear Physics, Vol. 92, Issue 3; ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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