Proton‐induced Thermonuclear Reaction Rates for A  = 20–40 Nuclei

Abstract

Proton-induced reaction rates on 26 stable and 29 unstable target nuclei in the mass A \ 20È40 region have been evaluated and compiled. Recommended reaction rates, assuming that all interacting nuclei are in the ground state, are presented in tabular form on a temperature grid in the range T \ 0.01È10.0 GK. Most reaction rates involving stable targets were normalized to a set of measured standard resonance strengths in the sd shell. For the majority of reaction rates, experimental information from transfer reaction studies has been used consistently. Our results are compared with recent statistical model (HauserFeshbach) calculations. Reaction rate uncertainties are presented and amount to several orders of magnitude for many of the reactions. Several of these reaction rates and/or their corresponding uncertainties deviate from results of previous compilations. In most cases, the deviations are explained by the fact that new experimental information became available recently. Examples are given for calculating reaction rates and reverse reaction rates for thermally excited nuclei from the present results. The survey of literature for this review was concluded in 2000 August.

Evolution of massive AGB stars

“…Using the Iliadis et al (2001) reaction rates instead of the default Angulo et al (1999) rates affects the production of the Ne, Mg, and Al isotopes. The faster 23 Na(p, γ) rate of Iliadis et al (2001) favours the leakage into the MgAl chain and accentuates the sodium depletion.…”

“…The faster 23 Na(p, γ) rate of Iliadis et al (2001) favours the leakage into the MgAl chain and accentuates the sodium depletion. As mentioned in Siess & Arnould (2008), the abundances of 24 Mg and 26 Mg are weakly affected by this change in nuclear reaction rates.…”

Absolute determination of theNa22(p,γ)Sallaska1, Wrede2, Garcı́a3 et al. 2011Phys. Rev. C255340View full textAdd to dashboardCite

“…The 23 Na(p, γ) resonance at E p = 512 keV has a reported strength of 91.3 ± 12.5 meV and is the recommended reference resonance for this reaction [49]. We measured this with a target containing (5.8 ± 0.9) ×10 15 atoms, as determined by implantation charge integration with a measured correction for the sputtering of positive ions.…”

“…The authors of Ref. [49] also varied the rate by a factor of two using various one-zone models of novae to extract the effect. Using the information given in these references and our change in the reaction rate, the estimated abundance of 22 Na in novae is expected to be reduced by factors of 2 to 3 of what was previously expected, depending on white dwarf mass and composition.…”

Thermohaline instability and rotation-induced mixing

“…For proton captures on elements higher then Ne, we follow rates from Iliadis et al (2001) or otherwise Bao et al (2000). (Horiguchi et al 1996); -14 C(p, γ) 15 N (Wiescher et al 1990); -14 C(p, n) 14 N (Koehler & O'brien 1989a); -14 C(α, n) 17 O; 17 O(n, 4 He) 14 C (Schatz et al 1993 (Woosley et al 1978) 2 .…”