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HK: Hadronen und Kerne
HK 38: Spectroscopy 104 ≤ A < 140
HK 38.6: Talk
Tuesday, March 17, 1998, 18:15–18:30, D
High Spin Structure in 123Xe. — •I. Schneider1, A. Schmidt1, H. Meise1, I. Wiedenhöver1, O. Stuch1, K. Jessen1, D. Weisshaar1, C. Schumacher1, P. von Brentano1, G. Sletten2, B. Herskind2, M. Bergström2, and J. Wrzesinski3 — 1Institut für Kernphysik, Universität zu Köln — 2Niels-Bohr-Institute, Risø, Denmark — 3Institute of Nuclear Research, Kraków, Poland
Excited states of the nucleus 123Xe have been investigated with
the fusion–evaporation-reaction 110Pd (18O,5n) 123Xe
at 86 MeV beam energy, using the compton-suppressed Nordball-multidetector-system at the Niels-Bohr-Institute in Risø,
Denmark. The level scheme of 123Xe was extended up to a level of
tentative 53/2+ℏ. Four excited bands of
3-quasiparticle-character were observed. Analyzing the
directional correlation information, it was possible to assign spin-
and parity-values to all observed bands in 123Xe. A very
interesting 3-quasiparticle-band, the so called Z-band, shows a very
complicated decay pattern to the lower positive and negative parity
states. This indicates that the Z-band has a significantly different
structure than the other bands. The spin- and parity-values of this
band could be established unambiguously from the analysis of the
γγ-DCO-information. The observed band structures of
123Xe fit well into systematics of the neighboring nuclei
125Xe and 127Xe.
This work was supported by DFG under contract Br 799/8-1