Thermonuclear reaction S-30(p,gamma)Cl-31 studied via Coulomb breakup of Cl-31

Publication Type
Journal Article
Year of Publication
Langer, C.
Lepyoshkina, O.
Aksyutina, Y.
Aumann, T.
Novo, S. B.
Benlliure, J.
Boretzky, K.
Chartier, M.
Cortina, D.
Pramanik, U. D.
Ershova, O.
Geissel, H.
Gernhauser, R.
Heil, M.
Ickert, G.
Johansson, H. T.
Jonson, B.
Kelic-Heil, A.
Klimkiewicz, A.
Kratz, J. V.
Krucken, R.
Kulessa, R.
Larsson, K.
Le Bleis, T.
Lemmon, R.
Mahata, K.
Marganiec, J.
Nilsson, T.
Panin, V.
Plag, R.
Prokopowicz, W.
Reifarth, R.
Ricciardi, V.
Rossi, D. M.
Schwertel, S.
Simon, H.
Summerer, K.
Streicher, B.
Taylor, J.
Vignote, J. R.
Wamers, F.
Wimmer, C.
Wu, P. Z.
Name of Publication
Physical Review C
Date Published
Short Title
Thermonuclear reaction S-30(p,gamma)Cl-31 studied via Coulomb breakup of Cl-31
Accession Number
ISBN Number

Coulomb breakup at high energy in inverse kinematics of proton-rich Cl-31 was used to constrain the thermonuclear S-30(p,gamma)Cl-31 capture reaction rate under typical Type I x-ray burst conditions. This reaction is a bottleneck during rapid proton-capture nucleosynthesis (rp process), where its rate depends predominantly on the nuclear structure of Cl-31. Two low-lying states just above the proton-separation threshold of S-p = 296( 50) keV in Cl-31 have been identified experimentally using the (RB)-B-3-LAND setup at the GSI Helmholtzzentrum fur Schwerionenforschung GmbH. Both states are considered to play a key role in the thermonuclear S-30( p,gamma)Cl-31 capture reaction. Excitation energies of the first J(pi) = 1/2(+), 5/2(+) states have been extracted and the reaction rate for proton capture on S-30 under typical rp-process temperatures has been investigated.