Gamma-spectroscopic investigations on 67Ge |
| |
Authors: | V Zobel L Cleemann J Eberth T Heck W Neumann |
| |
Institution: | Institut für Kernphysik der Universität zu Köln, D-5000 Köln 41, West-Germany |
| |
Abstract: | By γ-γ coincidence measurements following the 57Fe(12C, 2nγ) reaction at E12C = 40 MeV several new states above 1.5 MeV excitation energy in 67Ge have been established. Spin and parity assignments on the basis of the angular distribution, linear polarization and γ-ray yield function indicate very similar structures in 67, 69Ge. The positive-parity states can be followed up to the state at Ex = 3.07 MeV followed by a sequence of negative-parity high-spin states at nearly the same excitation energy relative to the single-particle state as in the neighbouring nucleus 69Ge where these states were found to have strong single-particle admixtures. A reinvestigation of the spin of the Ex = 2.75 MeV level in 69Ge resulting in a change of its spin from and for all spins above, removed the discrepancy concerning the spin assignments of corresponding levels in 67, 69Ge. The excitation pattern of the Ge isotopes with 34 ≦ N ≦ 39 clearly indicate same structures probably due to the strong competition between collective and single-particle excitations along the whole chain similar to the results for the Zn isotopes. |
| |
Keywords: | Nuclear reactions |
本文献已被 ScienceDirect 等数据库收录! |
|