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

C. Langer ; O. Lepyoshkina ; Y. Aksyutina ; T. Aumann ; S. B. Novo ; J. Benlliure ; K. Boretzky ; M. Chartier ; D. Cortina ; U. D. Pramanik ; O. Ershova ; H. Geissel ; R. Gernhauser ; M. Heil ; G. Ickert ; Håkan T. Johansson (Institutionen för fundamental fysik) ; Björn Jonson (Institutionen för fundamental fysik) ; A. Kelic-Heil ; A. Klimkiewicz ; J. V. Kratz ; R. Krucken ; R. Kulessa ; Kristian Larsson (Institutionen för fundamental fysik) ; T. Le Bleis ; R. Lemmon ; K. Mahata ; J. Marganiec ; Thomas Nilsson (Institutionen för fundamental fysik) ; V. Panin ; R. Plag ; W. Prokopowicz ; R. Reifarth ; V. Ricciardi ; D. M. Rossi ; S. Schwertel ; H. Simon ; K. Summerer ; B. Streicher ; J. Taylor ; J. R. Vignote ; F. Wamers ; C. Wimmer ; P. Z. Wu
Physical Review C. Nuclear Physics (0556-2813). Vol. 89 (2014), 3,
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: X-RAY-BURSTS, RELATIVISTIC HEAVY-IONS, RP-PROCESS, REACTION-RATES, NUCLEI, GRAPHS, TABLES, AR-31, DECAY



Denna post skapades 2014-05-15. Senast ändrad 2015-03-30.
CPL Pubid: 198109

 

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Institutioner (Chalmers)

Institutionen för fundamental fysik (2005-2015)

Ämnesområden

Fysik
Subatomär fysik
Kärnfysik

Chalmers infrastruktur