Abstract
Of particular interest in astrophysics is the S34(p,γ)Cl35 reaction, which serves as a stepping stone in thermonuclear runaway reaction chains during a nova explosion. Though the isotopes involved are all stable, the reaction rate of this significant step is not well known, due to a lack of experimental spectroscopic information on states within the Gamow window above the proton separation threshold of Cl35. Measurements of level spins and parities provide input for the calculation of resonance strengths, which ultimately determine the astrophysical reaction rate of the S34(p,γ)Cl35 proton capture reaction. By performing the Cl37(p,t)Cl35 reaction in normal kinematics at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory, we have conducted a study of the region of astrophysical interest in Cl35, and have made the first-ever constraint on the spin and parity assignment for a level at 6677±15 keV (Er=306 keV), inside the Gamow window for novae.
| Original language | English |
|---|---|
| Article number | 045808 |
| Journal | Physical Review C |
| Volume | 95 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 28 2017 |
Funding
This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-AC05-00OR22725 and this research used resources of the Holifield Radioactive Ion Beam Facility, which is a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. Oak Ridge National Laboratory is managed by UT-Battelle, LLC, for the U.S. Department of Energy (DOE). This work was supported in part by the National Nuclear Security Administration under the Stewardship Science Academic Alliances program through the U.S. DOE Cooperative Agreement No. DE-FG52-08NA28552 with Rutgers University and Oak Ridge Associated Universities. This work was also supported in part by the U.S. DOE under Contracts No. DE-FG02-96ER40955 with Tennessee Technological University, and No. DE-FG02-96ER40983 with the University of Tennessee Knoxville, the National Science Foundation, and a National Research Foundation of Korea (NRF) grants funded by the Korea government (MEST) (No. NRF-2015R1D1A1A01056918 and No. NRF-2016R1A5A1013277).