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Development of magnetic rotation in light Gd nuclei; study of 142Gd |
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| Authors: | RM Lieder T Rzaca-Urban H Brands W Gast HM Jäger L Mihailescu Z Marcinkowska W Urban T Morek Ch Droste P Szymański S Chmel D Bazzacco G Falconi R Menegazzo S Lunardi C Rossi Alvarez G de Angelis E Farnea A Gadea DR Napoli Z Podolyak Ts Venkova R Wyss |
| Institution: | (1) Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Germany, DE;(2) Institute of Experimental Physics, University of Warsaw, PL-00-681 Warszawa, Poland, PL;(3) Institut für Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn, DE;(4) Dipartimento di Fisica dell'Università and Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy, IT;(5) Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy, IT;(6) Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, BG-1784 Sofia, Bulgaria, BG;(7) Royal Institute of Technology, Physics Department Frescati, S-10405 Stockholm, Sweden, SE |
| Abstract: | High-spin states in 142Gd have been populated by means of the 99Ru(48Ti, 2p3n) reaction at 240 MeV and investigated with the γ-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. Received: 9 December 2001 / Accepted: 9 January 2002 |
| Keywords: | PACS 21 10 Re Collective levels – 21 60 Ev Collective models – 23 20 En Angular distribution and correlation measurements – 27 60 +j 90 ?A? 149 |
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