Shape evolution and magnetic rotation in 141Nd

Springer Science and Business Media LLC - Tập 51 - Trang 1-21 - 2015
T. Zerrouki1, C. M. Petrache1, R. Leguillon1, K. Hauschild1, A. Korichi1, A. Lopez-Martens1, S. Frauendorf2, I. Ragnarsson3, H. Hübel4, A. Neußer-Neffgen4, A. Al-Khatib4, P. Bringel4, A. Bürger4, N. Nenoff4, G. Schönwaßer4, A. K. Singh4, D. Curien5, G. B. Hagemann6, B. Herskind6, G. Sletten6, P. Fallon7, A. Görgen8, P. Bednarczyk9
1Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Université Paris-Sud and CNRS/IN2P3, Orsay, France
2Department of Physics, University of Notre Dame, Notre Dame, USA
3Division of Mathematical Physics, LTH, Lund University, Lund, Sweden
4Helmholtz–Institut für Strahlen– und Kernphysik, Universität Bonn, Bonn, Germany
5Departement de Recherches Subatomiques, Institut Pluridisciplinaire Hubert Curien, DRS-IPHC, Strasbourg, France
6Niels Bohr Institute, Copenhagen, Denmark
7Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, USA
8Departement de Physics, University of Oslo, Oslo, Norway
9The Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland

Tóm tắt

The high-spin states in 141Nd were investigated using the 96Zr(48Ca, 3n) reaction and the EUROBALL array. The level scheme has been extended up to an excitation energy of around 16MeV and spin 81/2. Two new bands of dipole transitions and three bands presumably of quadrupole transitions were identified and their connections to low-lying states were established. Cranked Nilsson-Strutinsky and tilted axis cranking calculations are combined in the interpretation of the observed dipole bands. The high-spin bands with assigned quadrupole transitions are interpreted as triaxial bands, while the dipole bands appear in the calculations to exhibit a shape evolution from low-deformation triaxial to spherical shape. They can be classified as magnetic rotation, with transition probabilities that show the characteristic decrease with angular momentum caused by the shears mechanism.

Tài liệu tham khảo

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