Dipole excitations in the transitional nucleus [Formula Presented]Nd studied in photon scattering experiments

T. Eckert, O. Beck, J. Besserer, P. von Brentano, R. Fischer, R. D. Herzberg, U. Kneissl, J. Margraf, H. Maser, A. Nord, N. Pietralla, H. H. Pitz, S. W. Yates, A. Zilges

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Low-lying electric and magnetic dipole excitations in the transitional nucleus [Formula Presented]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 [Formula Presented]-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 [Formula Presented]Nd. The strong [Formula Presented]1 excitation at 2185 keV in this [Formula Presented] = 84 nucleus is interpreted as the quadrupole-octupole coupled two-phonon excitation which has been observed systematically in the neighboring [Formula Presented] = 82 isotones. The decay properties of this 1[Formula Presented] state are compared with the systematics of the low-lying 1[Formula Presented] levels in the other even-even, stable Nd isotopes. The [Formula Presented]1 excitations in [Formula Presented]Nd are discussed with respect to the deformation dependence of the orbital [Formula Presented]1 “scissors mode”, the so-called “[Formula Presented] law”, which has been studied previously in the other stable even-even Nd nuclei and in the Sm isotopes.

Original languageEnglish
Pages (from-to)1256-1265
Number of pages10
JournalPhysical Review C - Nuclear Physics
Volume56
Issue number3
DOIs
StatePublished - 1997

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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