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First spin-parity constraint of the 306 keV resonance in Cl35 for nova nucleosynthesis
Chipps, K. A.,Pain, S. D.,Kozub, R. L.,Bardayan, D. W.,Cizewski, J. A.,Chae, K. Y.,Liang, J. F.,Matei, C.,Moazen, B. H.,Nesaraja, C. D.,O'Malley, P. D.,Peters, W. A.,Pittman, S. T.,Schmitt, K. T.,Smit American Physical Society 2017 Physical review. C Vol.95 No.4
<P>Of particular interest in astrophysics is the S-34(p,gamma) Cl-35 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 Cl-35. Measurements of level spins and parities provide input for the calculation of resonance strengths, which ultimately determine the astrophysical reaction rate of the S-34(p,gamma)Cl-35 proton capture reaction. By performing the Cl-37( p,t)Cl-35 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 Cl-35, and have made the first-ever constraint on the spin and parity assignment for a level at 6677 +/- 15 keV (E-r = 306 keV), inside the Gamow window for novae.</P>