Coulomb dissociation of P 27 at 500 MeV/u

Authors :: Marganiec, J.
Beceiro Novo, S.
Typel, S.
Langer, C.
Wimmer, C.
Alvarez-Pol, H.
Aumann, T.
Boretzky, K.
Casarejos, E.
Chatillon, A.
Cortina-Gil, D.
Datta-Pramanik, U.
Elekes, Z.
Fulop, Z.
Galaviz, D.
Geissel, H.
Giron, S.
Greife, U.
Hammache, F.
Heil, M.
Hoffman, J.
Johansson, H.
Kiselev, O.
Kurz, N.
Larsson, K.
Le Bleis, T.
Litvinov, Yu A.
Mahata, K.
Muentz, C.
Nociforo, C.
Ott, W.
Paschalis, S.
Plag, R.
Prokopowicz, W.
Rodríguez Tajes, C.
Rossi, D. M.
Simon, H.
Stanoiu, M.
Stroth, J.
Sümmerer, K.
Wagner, A.
Wamers, F.
Weick, H.
Wiescher, M.
Publication Year :: 2016
Abstract: The proton-capture reaction Si26(p,γ)P27 was studied via Coulomb dissociation (CD) of P27 at an incident energy of about 500 MeV/u. The three lowest-lying resonances in P27 have been populated and their resonance strengths have been measured. In addition, a nonresonant direct-capture component was clearly identified and its astrophysical S factor measured. The experimental results are compared to Monte Carlo simulations of the CD process using a semiclassical model. Our thermonuclear reaction rates show good agreement with the rates from a recent compilation. With respect to the nuclear structure of P27 we have found evidence for a negative-parity intruder state at 2.88-MeV excitation energy.

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