Dipole excitations in the transitional nucleus {sup 144}Nd studied in photon scattering experiments
- Institut fuer Strahlenphysik, Universitaet Stuttgart, Allmandring 3, D-70569 Stuttgart (Germany)
- Institut fuer Kernphysik, Universitaet zu Koeln, Zuelpicher Str. 77, D-50937 Koeln (Germany)
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)
Low-lying electric and magnetic dipole excitations in the transitional nucleus {sup 144}Nd have been studied in nuclear resonance fluorescence experiments performed with a bremsstrahlung beam (end point energy 4.1 MeV). The use of high-resolution {gamma}-ray spectrometers and a sectored single-crystal Compton polarimeter provided detailed information on excitation energies, spins, parities, decay widths, transition probabilities, and branching ratios of numerous new spin-1 states in {sup 144}Nd. The strong E1 excitation at 2185 keV in this N = 84 nucleus is interpreted as the quadrupole-octupole coupled two-phonon excitation which has been observed systematically in the neighboring N = 82 isotones. The decay properties of this 1{sup {minus} } state are compared with the systematics of the low-lying 1{sup {minus}} levels in the other even-even, stable Nd isotopes. The M1 excitations in {sup 144}Nd are discussed with respect to the deformation dependence of the orbital M1 scissors mode, the so-called {delta}{sup 2} law, which has been studied previously in the other stable even-even Nd nuclei and in the Sm isotopes. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 560739
- 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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