Speaker
Roy Holt
(California Institute of Technology and Argonne National Laboratory)
Description
The $^{12}$C($\alpha,\gamma$)$^{16}$O reaction has a key role in nuclear astrophysics. A multilevel R-matrix analysis was used to make extrapolations of the astrophysical S factor for this reaction to the stellar energy of 300 keV. The statistical precision of the S-factor extrapolation was determined by performing multiple fits to randomized (according to the experimental errors) existing E1 and E2 ground state data. The impact of a future proposed experiment at Jefferson Laboratory (JLab) was assessed within this framework. The proposed JLab experiment will make use of a high-intensity low-energy bremsstrahlung beam that impinges on an oxygen-rich single-fluid bubble chamber in order to measure the total cross section for the $^{16}$O($\gamma,\alpha$)$^{12}$C reaction. The importance of low energy data as well as high precision data was investigated. The results of this study will be presented.
| rholt@caltech.edu | |
| Funding source | U.S. National Science Foundation, grant 1506459 and U.S. Department of Energy, Office of Nuclear Physics, contract No. DE-AC02-06CH11357. |
Primary author
Roy Holt
(California Institute of Technology and Argonne National Laboratory)
Co-authors
Brad Filippone
(California Institute of Technology)
Steven Pieper
(Argonne National Laboratory)
