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The Coulomb breakup method has been applied to investigations of several radiative capture processes of astrophysical interest. The method has an advantage of high experimental efficiency when the inc...
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Asymptotic normalization coefficients for 14N-->13C+p and 10B-->9Be+p
The proton exchange reactions 13C(14N,13C)14N and 9Be(10B,9Be)10B were studied at energies where they are peripheral. Angular distributions for elastic scattering and proton transfer were measured, an...

Measurement of E2 transitions in the Coulomb dissociation of 8B

AIP Conf. Proc. -- December 21, 1998 -- Volume 455, pp. 890-895
Exotic nuclei and atomic masses (ENAM 98); doi:10.1063/1.57374

Issue Date: 21 December 1998

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B. Davids,1,2 D. W. Anthony,1,3 Sam M. Austin,1,2 D. Bazin,1 B. Blank,1,4 J. A. Caggiano,1,2 M. Chartier,1 H. Esbensen,5 P. Hui,1 C. F. Powell,1,3 H. Scheit,1,2 B. M. Sherrill,1,2 M. Steiner,1 P. Thirolf,6 J. Yurkon,1 and A. Zeller1
1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
2Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
3Department of Chemistry, Michigan State University, East Lansing, Michigan 48824
4Centre d'Etudes Nucléaires de Bordeaux-Gradignan, F-33175 Gradignan Cedex, France
5Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
6Ludwig Maximilians Universität München, Am Coulombwall 1, D-85748 Garching, Germany

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/u8B 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 SE2/SE1=6.7<sub>-1.9</sub><sup>+2.8</sup>×10−4 at the 0.63 MeV 1+ resonance. If higher order dynamical effects are not negligible, then the E2 strength extracted here is a lower limit. ©1998 American Institute of Physics.
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KEYWORDS and PACS

Keywords
PACS
  • 25.40.Lw
    Nuclear reactions: specific reactions Nucleon-induced reactions Radiative capture
  • 27.20.+n
    Properties of specific nuclei listed by mass ranges 6A19
  • 26.30.+k
    Nuclear astrophysics Nucleosynthesis in novae, supernovae and other explosive environments
  • 97.10.Cv
    Stars Stellar characteristics and properties Stellar structure, interiors, evolution, nucleosynthesis, ages
  • YEAR: 1998

PUBLICATION DATA

ISSN:
0094-243X (print)  
Publisher:
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