Abstract
The stellar cross sections of the Ne isotopes are important for a number of astrophysical quests, i.e., for the interpretation of abundance patterns in presolar material or with respect to the -process neutron balance in red giant stars. This paper presents resonance studies of experimental data in the keV range, which had not been fully analyzed before. The analyses were carried out with the -matrix code sammy. With these results for the resonant part and by adding the components due to direct radiative capture, improved Maxwellian-averaged cross sections (MACS) could be determined. At thermal energy we obtain MACS values of , and for , and , respectively. In earlier work the stellar rates of and had been grossly overestimated. and are significant neutron poisons for the process in stars because their very small MACS values are compensated by their large abundances.
- Received 30 November 2012
- Revised 10 September 2014
DOI:https://doi.org/10.1103/PhysRevC.90.045804
©2014 American Physical Society