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HK: Hadronen und Kerne
HK 28: Spectroscopy: 70 ≤ A < 110
HK 28.8: Talk
Tuesday, March 17, 1998, 16:15–16:30, D
Transition probabilities in 105,104In and the shell model — •D. Kast1, A. Jungclaus1, K.P. Lieb1, G. de Angelis2, M. Gorska3, H. Grawe3, H. Tiesler4, A. Dewald4, R. Peusquens4, and C. Fahlander5 — 1II.Physikalisches Institut, Universität Göttingen, D-37073 Göttingen — 2INFN, I-35020 Legnaro — 3GSI, D-64291 Darmstadt — 4Institut für Kernphysik, Universität zu Köln, D-50937 Köln — 5Physics Department, Lund University, S-22100 Lund
Neutron deficient nuclei around 100Sn are ideal objects to investigate the shell model character of high spin states in this mass region. In recent years in-beam experiments have extended considerably our knowledge about level energies in light In isotopes [1,2]. In our experiment we determined lifetimes of exited states in 105,104In in the range of 0.4 - 600 ps via a Recoil-Distance-Doppler-Shift measurement. An 1.2 mg/cm2 58Ni foil was bombarded by a 205 MeV 50Cr beam. γγγ coincidences were recorded in Ge-detectors of the GASP array at 12 flight distances between 15 and 7000 µm. Our results will be discussed in comparison to shell model calculations with residual interactions of Z<50 and N>50 nuclei as described in [3].
[1] M. de Poli et al., Physica Scripta T56 (1995) 296
[2] D. Seweryniak et al., Nucl. Phys. A 589 (1995) 175
[3] H. Grawe et al., Physica Scripta T56 (1995) 71