Na-21(p,gamma)Mg-22 thermonuclear rate for Na-22 production in novae - art. no. 045803

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