Structure of 22 Mg and its implications for explosive nucleosynthesis
2001; American Institute of Physics; Volume: 63; Issue: 6 Linguagem: Inglês
10.1103/physrevc.63.065807
ISSN1538-4497
AutoresA. A. Chen, R. Lewis, K. B. Swartz, D. W. Visser, P. D. Parker,
Tópico(s)Atomic and Molecular Physics
ResumoThe locations of ${}^{18}\mathrm{Ne}+\ensuremath{\alpha}$ resonances have been measured as excited states in ${}^{22}\mathrm{Mg}$ using the ${}^{12}\mathrm{C}{(}^{16}\mathrm{O}{,}^{6}\mathrm{He}{)}^{22}\mathrm{Mg}$ reaction. Eighteen new levels were discovered in the range $0<~{E}_{\mathrm{c}.\mathrm{m}.}<~3\mathrm{MeV}$ above the ${}^{18}\mathrm{Ne}+\ensuremath{\alpha}$ threshold. The ${}^{18}\mathrm{Ne}(\ensuremath{\alpha}{,p)}^{21}\mathrm{Na}$ reaction rate in the temperature range $0.2<~T<~1.0\mathrm{GK}$ has been calculated using the results from the present measurements, and the implications for nuclear burning in explosive stellar scenarios are discussed. This study also yielded energy-level information on low-lying ${}^{21}\mathrm{Na}+p$ resonances of importance to the ${}^{21}\mathrm{Na}(p,\ensuremath{\gamma}{)}^{22}\mathrm{Mg}$ reaction, one of the key links in the NeNa cycles in novae.
Referência(s)