Three- and five-quasiparticle isomers,rotational bands and residual interactions in 175Hf |
| |
Authors: | GD Dracoulis PM Walker |
| |
Institution: | 1. Department of Nuclear Physics, Research School of Physical Sciences, Australian National University, PO Box 4 Canberra, ACT 2600 Australia;2. Department of Nuclear Physics, Research School of Physical Sciences, Australian National University, PO Box 4 Canberra, ACT 2600 Australia;3. Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 USA |
| |
Abstract: | Two 3-quasiparticle isomers with spins, parities and half-lives of +, 1.1 μs and ?, 1.2 ns have been identified at 1433 and 1766 keV in 175Hf. A third isomer, possibly ? with a 1.2 μs half-life, is found at 3015 keV. The first two are characterised as a + 633] neutron coupled to the known 6+ and 8? 2-proton isomers of the core nuclei. Rotational bands based on the 3-qp isomers are highly perturbed, due to Coriolis mixing, and their structure is reproduced in a band mixing calculation. The energy depression of the 3-quasiparticle states relative to the 2-quasiproton core states is attributed mainly to the residual proton-neutron interaction, and possibly also to blocking effects through neutron admixtures. |
| |
Keywords: | Nuclear reactions |
本文献已被 ScienceDirect 等数据库收录! |
|