Measurement of E2 transitions in the Coulomb dissociation of {sup 8}B

Journal Article · Mon Dec 21 04:00:00 EST 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.57374· OSTI ID:21207886

Davids, B; Austin, Sam M; Caggiano, J A; Scheit, H; Sherrill, B M ^[1]; Anthony, D W; Powell, C F ^[1]; Bazin, D; Chartier, M; Hui, P; Steiner, M; Yurkon, J; Zeller, A ^[1]; Blank, B ^[1]; Esbensen, H ^[2]; Thirolf, P ^[3]

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1. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
2. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. 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}) {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 -1.9}{sup +2.8}x10{sup -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.

• OSTI ID: 21207886
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 455; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
BERYLLIUM 7
BERYLLIUM 7 TARGET
BORON 8
BORON 8 REACTIONS
COULOMB EXCITATION
CROSS SECTIONS
E2-TRANSITIONS
GAMMA SPECTRA
LEAD 208 TARGET
LONGITUDINAL MOMENTUM
MEV RANGE
NUCLEAR FRAGMENTATION
NUCLEAR FRAGMENTS
NUCLEAR REACTION KINETICS
PERTURBATION THEORY
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS