Astrophysical S(E) factor of the {sup 15}N(p,{alpha}){sup 12}C reaction at sub-Coulomb energies via the Trojan horse method
- Dipartimento di Metodologie Fisiche e Chimiche per l'Ingegneria-Universita di Catania, Catania, Italy and Laboratori Nazionali del Sud-INFN, Catania (Italy)
The low-energy bare-nucleus cross section for {sup 15}N(p,{alpha}){sup 12}C is extracted by means of the Trojan horse method applied to the {sup 2}H({sup 15}N,{alpha}{sup 12}C)n reaction at E{sub beam}=60 MeV. For the first time we applied the modified half-off-energy-shell resonant R-matrix method that takes into account off-energy-shell effects and initial- and final-state interactions. In particular it has been shown that inclusion of Coulomb {sup 15}N-d scattering and off-shell effects do not affect the determination of the astrophysical factor. Also the simple plane-wave approximation used in previous analyses is justified. The results extracted via the Trojan horse method are compared to direct data in the same energy region and show very good agreement in the energy interval 70-312 keV. These results confirm the extrapolations of the S factor reported in literature.
- OSTI ID:
- 21068014
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 76, Issue 6; Other Information: DOI: 10.1103/PhysRevC.76.065804; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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