First observation of scissors mode states in an odd-mass nucleus

I. Bauske; J. M. Arias; P. von Brentano; A. Frank; H. Friedrichs; R. D. Heil; R.-D. Herzberg; F. Hoyler; P. Van Isacker; U. Kneissl; J. Margraf; H. H. Pitz; C. Wesselborg; A. Zilges

doi:10.1103/PhysRevLett.71.975

First observation of scissors mode states in an odd-mass nucleus

I. Bauske, J. M. Arias, P. von Brentano, A. Frank, H. Friedrichs, R. D. Heil, R.-D. Herzberg, F. Hoyler, P. Van Isacker, U. Kneissl, J. Margraf, H. H. Pitz, C. Wesselborg, and A. Zilges

Phys. Rev. Lett. 71, 975 – Published 16 August 1993

Abstract

Nuclear resonance fluorescence experiments are reported to search for enhanced M1 scissors mode states in the deformed odd-mass nucleus ${}^{163}{Dy}$ . A concentration of dipole strengths near 3 MeV excitation energy is found, which fits nicely into the systematics observed for M1 excitations in the neighboring even-even Dy isotopes. The observed strength distribution and the decay branching ratios are discussed in the context of the interacting boson-fermion model.

Received 4 May 1993

DOI:https://doi.org/10.1103/PhysRevLett.71.975

Authors & Affiliations

I. Bauske, J. M. Arias, P. von Brentano, A. Frank, H. Friedrichs, R. D. Heil, R.-D. Herzberg, F. Hoyler, P. Van Isacker, U. Kneissl, J. Margraf, H. H. Pitz, C. Wesselborg, and A. Zilges

Institut für Strahlenphysik, Universität Stuttgart, W-7000 Stuttgart, Germany
Departamento de Física Atómica, Molecular y Nuclear, Facultad de Física, Universidad de Sevilla, Apartado 1065, 41080 Sevilla, Spain
Institut für Kernphysik, Universität zu Köln, W-5000 Köln, Germany
Instituto de Ciencias Nucleares, Apartado Postal 70-543, México 04510 and Instituto de Física, Laboratorio de Cuernavaca, Universidad Nacional Autónoma de México, Mexico
Institut für Kernphysik, Universität Giessen, W-6300 Giessen, Germany
Physikalisches Institut, Universität Tübingen, W-7400 Tübingen, Germany
Department of Physics, University of Surrey, Guildford Gu2 5XH, England, and Grand Accélérateur National d’Ions Lourds, Boite Postal 5027, F-14021 Caen CEDEX, France