Coulomb Dissociation of Proton-Rich sd-shell Nuclei for Astrophysical Interest and Their Implications
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
Two astrophysical reactions, {sup 22}Mg(p,{gamma}){sup 23}Al and {sup 26}Si(p,{gamma}){sup 27}P, were investigated by using the Coulomb breakup of proton-rich isotopes {sup 23}Al and {sup 27}P. The radiative widths determined from the cross sections suggest that the {beta}{sup +} decay of {sup 22}Mg is favored over the {sup 22}Mg(p,{gamma}){sup 23}Al reaction, while {sup 26}Si(p,{gamma}){sup 27}P reaction is faster than the {beta}{sup +} decay of {sup 26}Si around the peak temperature of heavy novae. Two-neutron knockout reactions of the proton-rich sd-shell isotopes {sup 26}Si, {sup 30}S, and {sup 34}Ar were also studied. The measured branching ratios are well reproduced by a theoretical calculation which takes into account nucleon-nucleon correlation in a nucleus.
- OSTI ID:
- 21052860
- Journal Information:
- AIP Conference Proceedings, Vol. 972, Issue 1; Conference: Carpathian summer school of physics 2007 on exotic nuclei and nuclear/particle astrophysics (II), Sinaia (Romania), 21-31 Aug 2007; Other Information: DOI: 10.1063/1.2870291; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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