Two-quasiparticleK-isomeric states in strongly deformed neutron-rich Nd and Sm isotopes: a projected shell-model analysis

Autor: Yang Sun, Ying-Chun Yang, Sheng-Jiang Zhu, Mike Guidry, Cheng-Li Wu
Rok vydání: 2010
Předmět:
Zdroj: Journal of Physics G: Nuclear and Particle Physics. 37:085110
ISSN: 1361-6471
0954-3899
DOI: 10.1088/0954-3899/37/8/085110
Popis: Motivated by recent spectroscopy data from fission experiments, we apply the projected shell model to study systematically the structure of strongly deformed, neutron-rich, even–even Nd and Sm isotopes with neutron number from 94 to 100. We perform calculations for rotational bands up to spin I = 20 and analyze the band structure of low-lying states with quasiparticle excitations, with emphasis given to rotational bands based on various negative-parity two-quasiparticle (2-qp) isomers. Experimentally known isomers in these isotopes are described well. The calculations further predict proton 2-qp bands based on a 5− and a 7− isomer and neutron 2-qp bands based on a 4− and an 8− isomer. The properties for the yrast line are discussed, and quantities to test the predictions are suggested for future experiment.
Databáze: OpenAIRE