Measurement of E2 transitions in the Coulomb dissociation of {sup 8}B
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824 (United States)
- Centre dEtudes Nucleaires de Bordeaux-Gradignan, F-33175 Gradignan Cedex (France)
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Ludwig Maximilians Universitaet Muenchen, Am Coulombwall 1, D-85748 Garching (Germany)
In an effort to understand the implications of Coulomb dissociation experiments for the determination of the {sup 7}Be(p,{gamma})thinsp{sup 8}B reaction rate, longitudinal momentum distributions of {sup 7}Be fragments produced in the Coulomb dissociation of 44 and 81 MeV/u{sup 8}B 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 first order perturbation theory calculations, allowing a determination of the E2 strength. The measurement yields S{sub E2}/S{sub E1}=6.7{sub {minus}1.9}{sup +2.8}{times}10{sup {minus}4} at the 0.63 MeV 1{sup +} resonance. If higher order dynamical effects are not negligible, then the E2 strength extracted here is a lower limit. {copyright} {ital 1998 American Institute of Physics.}
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 348231
- Report Number(s):
- CONF-980672-; ISSN 0094-243X; TRN: 99:005712
- Journal Information:
- AIP Conference Proceedings, Vol. 455, Issue 1; Conference: ENAM `98: 2. international conference on exotic nuclei and atomic masses, Bellaire, MI (United States), 23-27 Jun 1998; Other Information: PBD: Dec 1998
- Country of Publication:
- United States
- Language:
- English
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