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Erlangen 2001 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 17: Kernphysik/Spektroskopie II - Rotationszust
ände

HK 17.2: Vortrag

Dienstag, 20. März 2001, 14:30–14:45, D

Transition Strengths in Magnetic Dipole Bands in 82Rb, 83Rb and 84Rb — •R. Schwengner1, G. Rainovski1,2, H. Schnare1, A. Wagner1, F. Dönau1, M. Hausmann3, O. Iordanov3, A. Jungclaus3, K.P. Lieb3, D.R. Napoli4, G. de Angelis4, M. Axiotis4, F. Brandolini5, N. Marginean4, and C. Rossi Alvarez51Institut für Kern- und Hadronenphysik, FZ Rossendorf, 01314 Dresden — 2Faculty of Physics, Univ. Sofia, 1164 Sofia, Bulgaria — 3II. Physikal. Inst., Univ. Göttingen, 37073 Göttingen — 4INFN, Lab. Naz. di Legnaro, 35020 Legnaro, Italy — 5INFN and Dipart. di Fisica dell’Univ. di Padova, 35131 Padova, Italy

We have studied magnetic dipole sequences of 82Rb, 83Rb and 84Rb using the reaction 11B + 76Ge (E = 45 MeV) at the XTU tandem accelerator of LNL at Legnaro. Gamma rays were detected with the spectrometer GASP. Level lifetimes were deduced from a lineshape analysis applying the Doppler-shift-attenuation method. The transition strengths in the regular M1 bands in the odd-odd isotopes 82Rb and 84Rb support the interpretation in terms of magnetic rotation. The experimental transition strengths in 83Rb show an irregular behaviour which is considered to be a consequence of the breakup of a neutron pair in this odd-even isotope.

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