29 May 2018 to 3 June 2018
Hyatt Regency Indian Wells Conference Center
US/Pacific timezone

Sensitivity Study for the $^{12}$C($\alpha,\gamma$)$^{16}$O Astrophysical Reaction Rate

30 May 2018, 15:20
20m
North Foyer | Joshua Tree Room (Hyatt Regency Indian Wells Conference Center)

North Foyer | Joshua Tree Room

Hyatt Regency Indian Wells Conference Center

44600 Indian Wells Lane, Indian Wells, CA 92210, USA

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.
E-mail [email protected]
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)

Presentation materials