Fragmentation of low-lying dipole strength in the odd-mass nucleus {sup 133}Cs
- Institut fuer Strahlenphysik, Universitaet Stuttgart, Allmandring 3, D-70569 Stuttgart (Germany)
- Institut fuer Kernphysik, Universitaet zu Koeln, Zuelpicher Strasse 77, D-50937 Koeln (Germany)
The fragmentation of low-lying dipole strength in the odd-mass nucleus {sup 133}Cs has been investigated in nuclear resonance fluorescence (NRF) experiments performed at the bremsstrahlung beam of the Stuttgart Dynamitron accelerator at an end-point energy of 4.1 MeV. In the excitation energy range 2.3 {endash} 3.7 MeV in total 22 new dipole excitations were observed. From the high-resolution {gamma}-ray spectra measured by three high-efficiency Ge detectors the reduced excitation probabilities B(E1){up_arrow} or B(M1){up_arrow} were deduced. The fragmentation and absolute total strengths of the detected dipole excitations are compared with results for the neighboring even-even, {gamma}-soft nucleus {sup 134}Ba, where both, rather strong {ital scissors mode-like} M1 and two-phonon E1 excitations are known from recent NRF experiments. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 560765
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 56; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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