Excitation and decay of giant resonances in the [sup 40]Ca([ital e],[ital e][prime][ital x]) reaction
- Institut fuer Kernphysik, Technische Hochschule Darmstadt, D-64289 Darmstadt (Germany)
- Institute for Nuclear Physics, Proeftuinstraat 86, B-9000 Ghent (Belgium)
- Department of Physics, University of the Witwatersrand, P.O. Wits, Johannesburg 2050 (South Africa)
The [sup 40]Ca([ital e],[ital e][prime][ital x]) reaction has been investigated for excitation energies between 8 and 26 MeV and momentum transfers from 0.25 to 0.66 fm[sup [minus]1] at the continuous-wave electron accelerators MAMI at Mainz S-DALINAC at Darmstadt. A multipole decomposition of the cross sections reveals strongly fragmented [ital E]2 (plus [ital E]0) strength around 14 and 17 MeV in contrast to all theoretical predictions. Angular correlations of proton decay are described over the entire energy range by a continuum random-phase-approximation approach. A comparison of the branching ratios to statistical model calculations provides information on the dominant damping mechanism.
- OSTI ID:
- 5009452
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:13; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
CALCIUM 40 TARGET
CHARGED-PARTICLE REACTIONS
CHEMICAL REACTIONS
CROSS SECTIONS
DECAY
DECOMPOSITION
ELECTRON REACTIONS
ENERGY-LEVEL TRANSITIONS
EXCITATION
GIANT RESONANCE
LEPTON REACTIONS
MOMENTUM TRANSFER
MULTIPOLES
NUCLEAR REACTIONS
RANDOM PHASE APPROXIMATION
RESONANCE
TARGETS