Coulomb dissociation of P 27 at 500 MeV/u
- Marganiec, J.
- Beceiro Novo, S.
- Typel, S.
- Langer, C.
- Wimmer, C.
- Álvarez-Pol, H.
- Aumann, T.
- Boretzky, K.
- Casarejos, E.
- Chatillon, A.
- Cortina-Gil, D.
- Galaviz, D.
- Rodríguez Tajes, C.
- Wiescher, M.
DOIAbstract
J. Marganiec et al. ; 15 págs.; 14 figs.; 6 tabs.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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