The 31S(p,γ)32Cl reaction is expected to provide the dominant break-out path from the SiP cycle in novae and is important for understanding enrichments of sulfur observed in some nova ejecta. We studied the 32S(3He,t)32Cl charge-exchange reaction to determine properties of proton-unbound levels in 32Cl that have previously contributed significant uncertainties to the 31S(p,γ)32Cl reaction rate. Measured triton magnetic rigidities were used to determine excitation energies in 32Cl. Proton-branching ratios were obtained by detecting decay protons from unbound 32Cl states in coincidence with tritons. An improved 31S(p,γ)32Cl reaction rate was calculated including robust statistical and systematic uncertainties. © 2011 American Physical Society.
Publication Source (Journal or Book title)
Physical Review C - Nuclear Physics
Matoš, M., Blackmon, J., Linhardt, L., Bardayan, D., Nesaraja, C., Clark, J., Deibel, C., O'Malley, P., & Parker, P. (2011). Unbound states of 32Cl and the 31S(p,γ) 32Cl reaction rate. Physical Review C - Nuclear Physics, 84 (5) https://doi.org/10.1103/PhysRevC.84.055806