Excitation and photon decay of giant multipole resonances - the role and future of medium-energy heavy ions
Inelastic scattering of medium energy heavy ions provides very large cross sections and peak-to-continuum ratios for excitation of giant resonances. For energies above about 50 MeV/nucleon, giant resonances are excited primarily through Coulomb excitation, which is indifferent to isospin, thus providing a good probe for the study of isovector giant resonances. The extremely large cross sections available from heavy ion excitation permit the study of rare decay modes of the photon decay of giant resonances following excitation by 22 and 84 MeV/nucleon /sup 17/O projectiles. The singles results at 84 MeV/nucleon yield peak cross sections for the isoscalar giant quadrupole resonance and the isovector giant dipole resonance of approximately 0.8 and 3 barns/sr, respectively. Data on the ground state decay of the isoscalar giant quadrupole and isovector giant dipole resonances are presented and compared with calculations. Decays to low-lying excited states are also discussed. Preliminary results from an experiment to isolate the /sup 208/Pb isovector quadrupole resonance using its gamma decay are presented.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7144820
- Report Number(s):
- CONF-8806117-3; ON: DE88011842; TRN: 88-024788
- Resource Relation:
- Conference: 3. international conference on nucleus nucleus collisions, Saint-Malo, France, 6 Jun 1988; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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651920* - Nuclear Properties & Reactions
A=190-219
Experimental