Astrophysical S-factor of the ${}^7$Be($p,\gamma {)}^8$B reaction from Coulomb dissociation of ${}^8$B

Abstract

The Coulomb dissociation method to obtain the astrophysical S-factor, $S_{17}(0)$, for the ${}^7$Be($p,\gamma {)}^8$B reaction at solar energies is investigated by analysing the recently measured data on the breakup reaction ${}^{208}$Pb${(}^8$B,${}^7$Be$p{)}^{208}$Pb at 46.5 MeV/A beam energy. Breakup cross sections corresponding to E1, $E2$ and $M1$ transitions are calculated with a theory of Coulomb excitation that includes the effects of the Coulomb recoil as well as relativistic retardation. The interplay of nuclear and Coulomb contributions to the breakup process is studied by performing a full quantum mechanical calculation within the framework of the distorted-wave Born Approximation. In the kinematical regime of the present experiment, both nuclear as well as Coulomb-nuclear interference processes affect the pure Coulomb breakup cross sections very marginally. The $E2$ cross sections are strongly dependent on the model used to describe the structure of ${}^8$B. The value of $S_{17}(0)$ is deduced with and without $E2$ and $M1$ contributions added to the $E1$ cross sections and the results are discussed.

10 pages, with 4 figures included with psfig; Physics Letters B, in press

Cited by in corpus (12)

• Multi-step effects in subcoulomb breakup
• Measurement of E2 Transitions in the Coulomb Dissociation of 8B
• Reaction models to probe the structure of light exotic nuclei
• Coulomb and nuclear breakup of ${}^8$B
• Coulomb excitation of 11Be reexamined
• Off-shell effects in the energy dependence of the Be7(p,gamma)B8 astrophysical S factor
• E2 component in subcoulomb breakup of ^{8}B
• Intermediate baseline appearance experiments and three-neutrino mixing schemes
• Structure effects on the Coulomb dissociation of 8B at relativistic energies
• Structure Effects on Coulomb Dissociation of ${}^8$B
• Breakup of ${}^8$B and the ${}^7$Be($p,\gamma {)}^8$B reaction
• $E1-E2$ interference in the Coulomb dissociation of ${}^8$B