On the 21Na(p,gamma)22Mg thermonuclear rate for 22Na production in novae

Details On the 21Na(p,gamma)22Mg thermonuclear rate for 22Na production in novae On the 21Na(p,gamma)22Mg thermonuclear rate for 22Na production in novae

2000-08-16

arxiv.org/abs/astro-ph/0008241v1

Phys.Rev. C62 (2000) 045803

Astronomy and Astrophysics

Astrophysics

To appear in Phys. Rev. C, 6 pages with 3 figures

Scientific paper

10.1103/PhysRevC.62.045803

Classical novae are potential sources of gamma-rays, like the 1.275 MeV gamma emission following 22Na beta decay, that could be detected by appropriate instruments on board of future satellites like INTEGRAL. It has been shown that the production of 22Na by novae is affected by the uncertainty on the 21Na(p,gamma)22Mg rate and in particular by the unknown partial widths of the Ex = 5.714 MeV, J^pi = 2^+, 22Mg level. To reduce these uncertainties, we performed shell model calculations with the OXBASH code, compared the results with available spectroscopic data and calculated the missing partial widths. Finally, we discuss the influence of these results on the 21Na(p,gamma)22Mg reaction rate and 22Na synthesis.

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