The S{sub E1} factor of the {sup 12}C({alpha},{gamma}){sup 16}O Reaction and the {sup 16}N {beta}-delayed {alpha} Decay
- University of Notre Dame, Notre Dame, IN 46530 (United States)
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Ohio University, Athens, Ohio 45701 (United States)
- University of North Carolina, Chapel Hill, North Carolina 27599 (United States)
- Northwestern University, Evanston, Illinois 60208 (United States)
The {sup 12}C({alpha},{gamma}){sup 16}O reaction is of great importance for the understanding the nuclear synthesis and explosion mechanism of the supernova. The cross section at the relevant stellar burning energies, around 300 keV, is dominated by the sub-threshold resonances. The {sup 16}N {beta}-delayed {alpha} decay data provide the most sensitive constrain on this sub-threshold resonance. Using twin-ionization chambers, we have measured the {alpha} particles and {sup 12}C recoil nuclei in coincidence. The spectrum has been fitted together with the published {sup 12}C({alpha},{gamma}){sup 16}O data and the elastic scattering phase shift data using R-matrix. The S{sub E1} factor at 300 keV has been determined as 73{+-}21 keVb.
- OSTI ID:
- 21052863
- 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: 10.1063/1.2870303; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
The astrophysical S-factor of C-12(alpha, gamma)O-16 from the beta-delayed alpha-particle emission of N-16. Ph.D. Thesis
The {beta}-delayed {alpha} spectrum of {sup 16}N and the {sup 12}C({alpha},{gamma}){sup 16}O cross section at low energies