Population and detection of two-phonon octupole vibrational states in {sup 208}Pb
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
We report on an experiment to search for the decay of two-phonon octupole vibrational states in {sup 208}Pb with GAMMASPHERE. A beam of {sup 154}Sm at a bombarding energy of 1 GeV was used to excite {sup 208} Pb via quasielastic as well as via deep-inelastic processes. To be independent of the lifetime of the two-phonon state a thin target was used, requiring the measurement of the position of the scattered particles to correct for the Doppler shift of the emitted {gamma} rays. Scattered particles were detected by a silicon-strip detector covering forward angles. We did not observe any discrete {gamma} transition in the expected energy range of 2{endash}3 MeV down to a limit of 20{percent} and 4{percent} of the intensity in the 5{sup {minus}}{r_arrow}3{sup {minus}} transition for quasielastic and deep-inelastic processes, respectively. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Lawrence Berkeley National Laboratory
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 542733
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 56; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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