Structure of high-spin states in Pd-100

• High-spin states of the neutron deficient (100)pd nucleus have been investigated via the Cr-50(Ni-58, 4p alpha) and Zn-70(S-36,6n) heavy-ion induced reactions. For the detection of evaporated particles and gamma rays the NORDBALL array equipped with ancillary detectors and the EUROGAM II detector system were utilized. By the use of in-beam spectroscopic methods 89 transitions belonging to (100)pd have been observed, 49 of which were identified for the first time. The level scheme has been extended up to E-X approximate to 16 MeV excitation energy and I approximate to 25h. The experimental results were compared with the predictions of cranked shell model calculations. Maximal spin alignments were found in the (pig(9/2))(12+)(-4) (vd(5/2),g(7/2)(3)h(11/2))(13-) and (pig(9/2)(-3)p(1/2))(11-)(vd(5/2)g(7/2)(3)h(11/2))(13-) configurations. Possible existence of octupole correlations is discussed on the basis of 6 (E 1)lB(E2) values deduced for the decays of high-spin levels in the yrast negative-parity band.

Nyckelord

Cr-50(Ni-58,4p alpha) and Zn-70(S-36,6n) reactions

NORDBALL and EUROGAM II gamma-ray spectrometers

measured E-gamma, I-gamma, particle-gamma gamma and gamma gamma coincidences, gamma-ray angular correlation and linear polarisation

deduced Pd-100 levels, I, pi, gamma-ray multipolarities

terminating bands

total routhian surface plus cranked shell model

gamma-ray spectroscopy

terminating bands

excited-states

neutron

nuclei

ru-98,ru-99,ru-100

information

nordball

detector

array

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