Coulomb excitation of the one-neutron halo nucleus {sup 11}Be

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.56.R1· OSTI ID:549752

Fauerbach, M; Chromik, M J; Glasmacher, T; Hansen, P G; Scheit, H; Thoennessen, M ^[1]; Fauerbach, M; Chromik, M J; Glasmacher, T; Hansen, P G; Ibbotson, R W; Morrissey, D J; Scheit, H; Thoennessen, M ^[2]; Morrissey, D J ^[3]; Thirolf, P ^[4]

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1. Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States)
2. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
3. Department of Chemistry, Michigan State University, East Lansing, Michigan 48824 (United States)
4. Ludwig Maximilians Universitaet Muenchen, D-85748 Garching (Germany)

An exotic beam of {sup 11}Be at 57{endash}60 MeV/nucleon has been used for a study of the excitation cross section of the 320 keV first excited state in collisions with targets of Pb, Au, C, and Be. The deexcitation {gamma} rays were observed in an array of position-sensitive NaI(Tl) detectors in coincidence with the scattered fragment. The reduced transition strengths B(E1) extracted for the heavy targets suggest a predominantly electric excitation mechanism. Although the B(E1) value is marginally in agreement with that obtained from the lifetime of the state, the deviation is of the size expected from higher-order Coulomb and nuclear effects. Excitations on the lighter targets have sizable nuclear contributions. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 549752
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 56; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BERYLLIUM
BERYLLIUM 11 REACTIONS
CARBON
COULOMB EXCITATION
DE-EXCITATION
GAMMA RADIATION
GOLD
LEAD
LIFETIME
NEUTRONS
NUCLEAR HALOS