2018 Impact factor 2.481
Hadrons and Nuclei


Eur. Phys. J. A 13, 297-305 (2002)

Development of magnetic rotation in light Gd nuclei; study of $\chem{^{142}Gd}$

R.M. Lieder1, 2, T. Rzaca-Urban2, H. Brands1, W. Gast1, H.M. Jäger1, L. Mihailescu1, Z. Marcinkowska2, W. Urban2, T. Morek2, Ch. Droste2, P. Szymanski2, S. Chmel3, D. Bazzacco4, G. Falconi4, R. Menegazzo4, S. Lunardi4, C. Rossi Alvarez4, G. de Angelis5, E. Farnea5, A. Gadea5, D.R. Napoli5, Z. Podolyak5, Ts. Venkova6 and R. Wyss7

1  Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Germany
2  Institute of Experimental Physics, University of Warsaw, PL-00-681 Warszawa, Poland
3  Institut für Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn
4  Dipartimento di Fisica dell'Università and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
5  Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
6  Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, BG-1784 Sofia, Bulgaria
7  Royal Institute of Technology, Physics Department Frescati, S-10405 Stockholm, Sweden

r.lieder@fz-juelich.de

(Received: 9 December 2001 / Revised version: 17 December 2001 Communicated by D. Schwalm )

Abstract
High-spin states in 142Gd have been populated by means of the 99Ru( 48Ti,2p3n) reaction at 240 MeV and investigated with the $\gamma$-spectrometer EUROBALL III and the charged-particle detector array ISIS. The features of four dipole bands have been determined and compared with tilted-axis cranking model calculations indicating that they are magnetic rotational bands. A transition from regular to irregular bands has been found approaching N = 82 demonstrating that this is a general phenomenon in nuclei near a double-shell closure.

PACS
21.10.Re - Collective levels.
21.60.Ev - Collective models.
23.20.En - Angular distribution and correlation measurements.
27.60.+j - $90 \leq A \leq 149$ .

© Società Italiana di Fisica, Springer-Verlag 2002