Measurement of E2 Transitions in the Coulomb Dissociation of 8B

Abstract

In an effort to understand the implications of Coulomb dissociation experiments for the determination of the 7Be(p,gamma)8B reaction rate, longitudinal momentum distributions of 7Be fragments produced in the Coulomb dissociation of 44 and 81 MeV/nucleon 8B beams on a Pb target were measured. These distributions are characterized by asymmetries interpreted as the result of interference between E1 and E2 transition amplitudes in the Coulomb breakup. At the lower beam energy, both the asymmetries and the measured cross sections are well reproduced by perturbation theory calculations, allowing a determination of the E2 strength.

8 pages, 3 figures

References in corpus (5)

• Breakup reactions of the halo nuclei Be11 and B8
• New measurement and analysis of the 7Be(p,gamma)8B cross section
• Comment on E2 Contribution to the 8B ---> p + 7Be Coulomb Dissociation Cross Section [K. Langanke and T.D. Shoppa, Phys. Rev. C49(1994)R1771, ER(1994)]
• The E2 contribution to the 8B -> p + 7Be Coulomb dissociation cross section
• Astrophysical S-factor of the ${}^7$Be($p,\gamma {)}^8$B reaction from Coulomb dissociation of ${}^8$B

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