C. Protop

High spin states in75Se populated by the72Ge(α,n) and73Ge(α, 2n) reaction

The72Ge(α, n)75Se and73Ge(α, 2n)75Se reactions have been studied at bombarding energies of 15 MeV and 22.5 MeV respectively using Ge(Li)-detectors.γ-singles spectra,γ-γ-coincidences,γ-angular distributions and excitation functions have been taken. A level scheme has been constructed, which contains a stretched spin and a normal rotational band.Nuclear reactions72Ge(α, n)75Se,73Ge(α, 2n)75Se; measuredEγ,Iγ,γ-γ-coincidences,γ-angular distribution,γ-excitation function.75Se deduced levels,J, π, γ-multipolarity. Enriched target, Ge(Li).

High spin states in77Se populated by the74Ge(α,n γ) reaction

Abstract77Se has been investigated by the reaction74Ge(α,nγ) at 14 MeV. Gamma singles spectra, gamma angular distributions and gamma-gamma coincidences have been taken. A level scheme has been established, spins and parities have been assigned. States of a rotational band on the 1/2− ground state, a rotational band on the 5/2− 249.7 keV state and an anormal band have been identified. Nuclear Reaction74Ge(α,n γ)Eα=14 MeV; measuredEγ,Iγ,γ-γ-Coin.,γ-ang. distr.77Se deduced levels,J, π. Enriched target, Ge (Li).

Decoupled band in73As

Using the (α, 2nγ) reaction we have established a partial decay scheme of73As. A positive parity band built on the 428 keV 9/2+ level is interpreted as a decoupled band.

Excited states in145Gd from the (3He, 2n) reaction

Medium and high spin states in145Gd up to 3.5 MeV excitation energy have been studied by in-beam gamma ray and conversion electron spectroscopy bombarding enriched144Sm target with a3He beam. For a part of the identified levels a configuration is proposed in terms of weak coupling of one neutron hole with the146Gd core or of one neutron particle with the144Gd core.

High-spin states in 52Cr populated via the 50Ti(α, 2nγ) reaction

Abstract The decay scheme of 52 Cr has been studied by γ-ray spectroscopy with the 50 Ti( α , 2n γ ) reaction. Spin and parity assignments were made on the basis of coincidence measurements, angular distributions, excitation functions and DSAM lifetime measurements. Six new high-energy levels with spins up to 9 were established.