Coulomb dissociation of P 27 at 500 MeV/u

Marganiec, J. and Beceiro Novo, S. and Typel, S. and Langer, C. and Wimmer, C. and Elekes, Zoltán and Fülöp, Zsolt (2016) Coulomb dissociation of P 27 at 500 MeV/u. PHYSICAL REVIEW C, 93 (4). 045811. ISSN 0556-2813

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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. © 2016 American Physical Society.

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