No abstract

On lf2p nuclei. Seniority-three states of the V ( ~P ~; ~, 1 f512, 2 ~~1 ~) ~ configuration in 69Ni.

No abstract

Results of an attempt to establish in 69,71,73Ge the low-lying states of the presumed 1g 9/2 ⊗ core configuration are reported. The excited states in these nuclei were formed in the 66,68,70Zn(α,n) compound reactions mainly at 14.2 MeV incident energy. Properties of the states were assigned from investigations of the prompt γ-ray transitions. Measuring γ-γ coincidences, yield functions, angular distributions (and in a few cases also linear polarization) of γ-rays, evidences were found for states in 69 Ge: 1 350.4 keV 11/2+, 1 407.0 keV 13/2+, 2 017.9 keV 11/2+ or 13/2+, 2 119.2 keV 9/2+, 11/2+ or 13/2+, 3 075.5 keV 13/2+ or 15/2+, (and tentatively: 2 474.8 keV 11/2+ or 13/2+, and 2 754.6 keV 13/2+ or 15/2+). 71 Ge: 589.7 keV 7/2+, 1 037.8 keV (7/2 or 9/2), 1 172.6 keV 13/2+, 1 192.3 keV 11/2+, 1 205.2 keV (5/2+), 1 477.0 keV 11/2+, 1 559.3 keV, 1 566 keV, 1 959.7 keV 11/2+ or 13/2+, 2 299.2 keV 17/2+, 2 314.2 keV 15/2+ (and tentatively 1 697.8 keV). 73 Ge: 659.0 keV 9/2+, 825.8 keV 13/2+, 868.1 keV 11/2+, 1 610.3 keV 9/2+ or 13/2+, 1 871.6 keV 17/2+.

Abstract. Study of the energy levels of 156Dy through the 159Tb(p, 4n) 156Dy reaction has revealed the existence of six states with excitation energies between 1.8 and 2.8 MeV and spins between 6 and 12. Some of them can tentatively be assigned as low-spin members of "upper" bands which are thought to be responsible for the backbending phenomenon experimentally observed in the ground-state and //-vibrational bands of this nucleus. Others could be levels of a negative-parity octupole band.