Charged-particle thermonuclear reaction rates: III. Nuclear physics input

Abstract

The nuclear physics input used to compute the Monte Carlo reaction rates and probability density functions that are tabulated in the second paper of this series

Resonances in19Ne with relevance to the astrophysically important18F(p,Mountford1, Murphy2, Achouri3 et al. 2012Phys. Rev. C

“…The dashed lines are the astrophysical S-factor arising from interference combinations giving the highest and lowest values in the astrophysical region based on the parameters recommended by Iliadis et al [21]. The addition of the predicted subthreshold J π = 1/2 + state [5] significantly enhances the S-factor, as shown by the solid lines.…”

“…The impact of such a state is illustrated in Figure 4, where the astrophysical S-Factor most recently recommended by Iliadis et al [21] is shown (dashed lines), together with same S-factor modified by the inclusion of the proposed subthreshold 1/2 + state with parameters as suggested by [5] (solid lines). The two curves shown in each case correspond to the highest and lowest S-factors allowed due to the uncertainty in the interference between the 38 and 665 keV J π = 3/2 + states.…”

Nuclear astrophysics in the laboratory and in the universe

“…V. In the case of nova thermometers, the ratios O/S, S/Al, O/P, and P/Al have a pronounced temperature dependence, but are also strongly dependent on the uncertain rate of the 30 P(p,γ ) 31 S reaction. This reaction also affects the precision of the mixing meter Si/H.…”

Direct cross section measurement for the 18O(p,γ)19F reaction at astrophysical energies at LUNA

“…Further measurements regarding the off-resonant and on-resonant higher energy range, were done in order to improve our knowledge of levels in the 19 F compound nucleus that are relevant to nuclear astrophysics and to complete available data known in literature [7], [8], [9].…”