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Bochum 1998 – wissenschaftliches Programm

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HK: Hadronen und Kerne

HK 38: Spectroscopy 104 ≤ A < 140

HK 38.6: Vortrag

Dienstag, 17. März 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. Wrzesinski31Institut 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

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