Measurement of {ital E}2 Transitions in the Coulomb Dissociation of {sup 8}B

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.81.2209· OSTI ID:657809

Davids, B; Anthony, D W; Austin, S M; Bazin, D; Blank, B; Caggiano, J A; Chartier, M; Hui, P; Powell, C F; Scheit, H; Sherrill, B M; Steiner, M; Yurkon, J; Zeller, A ^[1]; Davids, B; Austin, S M; Caggiano, J A; Scheit, H; Sherrill, B M ^[2]; Anthony, D W ; Powell, C F ^[3]; Blank, B ^[4]; Esbensen, H ^[5]; Thirolf, P ^[6]

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1. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
2. Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
3. Department of Chemistry, Michigan State University, East Lansing, Michigan 48824 (United States)
4. Centre d`Etudes Nucleaires de Bordeaux-Gradignan, F-33175 Gradignan Cedex (France)
5. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
6. 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,thinsp{gamma}){sup 8} B reaction rate, longitudinal momentum distributions of {sup 7}Be fragments produced in the Coulomb dissociation of 44 and 81thinspthinspMeV/nucleon {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. When interpreted in the context of a first order perturbation theory of Coulomb dissociation that assumes a single particle {sup 8}B structure model, this measurement yields S{sub E2}/S{sub E1}=6.7{sup +2.8}{sub {minus}1 .9}{times}10{sup {minus}4} at a fragment relative kinetic energy of 0.6thinspMeV. {copyright} {ital 1998} {ital The American Physical Society }

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 657809
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 81; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BERYLLIUM
BERYLLIUM 7 TARGET
BORON
BORON 7
BORON 8
CROSS SECTIONS
DISSOCIATION
LEAD
LONGITUDINAL MOMENTUM
NUCLEAR REACTIONS
PROTON-NUCLEON INTERACTIONS
SOLAR NEUTRINOS