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Title: Projected shell model description for high-spin states in neutron-rich Fe isotopes

Abstract

A systematic study of neutron-rich even-even Fe isotopes with a neutron number from 32 to 42 is carried out by using the projected shell model. Calculations are performed up to the spin I=20 state. Irregularities found in the yrast spectra and in B (E2) values are discussed in terms of neutron excitations to the high-j orbital g{sub 9/2}. Furthermore, the neutron two-quasiparticle structure of a low-K negative-parity band and the proton two-quasiparticle structure of a high-K positive-parity band are predicted to exist near the yrast region. Our study reveals a soft nature for the ground state of N{approx_equal}40 isotopes and emphasizes the important role of the neutron g{sub 9/2} orbital in determining the structure properties for both low- and high-spin states in these nuclei.

Authors:
 [1];  [2];  [3]; ;  [1];  [4];  [1];  [2];  [5]
  1. Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China)
  2. (China)
  3. (United States)
  4. Department of Physics, Kyushu Sangyo University, Fukuoka 813-8503 (Japan)
  5. Institute of Natural Sciences, Senshu University, Tokyo 101-8425 (Japan)
Publication Date:
OSTI Identifier:
21296479
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 80; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.80.054306; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COMPUTERIZED SIMULATION; EXCITATION; GROUND STATES; HIGH SPIN STATES; IRON ISOTOPES; NEUTRON-RICH ISOTOPES; NEUTRONS; NUCLEI; PARITY; PROTONS; SHELL MODELS; SPECTRA; SPIN; YRAST STATES

Citation Formats

Sun Yang, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, Yang Yingchun, Liu Hongliang, Kaneko, Kazunari, Hasegawa, Munetake, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, and Mizusaki, Takahiro. Projected shell model description for high-spin states in neutron-rich Fe isotopes. United States: N. p., 2009. Web. doi:10.1103/PHYSREVC.80.054306.
Sun Yang, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, Yang Yingchun, Liu Hongliang, Kaneko, Kazunari, Hasegawa, Munetake, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, & Mizusaki, Takahiro. Projected shell model description for high-spin states in neutron-rich Fe isotopes. United States. doi:10.1103/PHYSREVC.80.054306.
Sun Yang, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, Yang Yingchun, Liu Hongliang, Kaneko, Kazunari, Hasegawa, Munetake, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, and Mizusaki, Takahiro. Sun . "Projected shell model description for high-spin states in neutron-rich Fe isotopes". United States. doi:10.1103/PHYSREVC.80.054306.
@article{osti_21296479,
title = {Projected shell model description for high-spin states in neutron-rich Fe isotopes},
author = {Sun Yang and Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 and Yang Yingchun and Liu Hongliang and Kaneko, Kazunari and Hasegawa, Munetake and Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 and Mizusaki, Takahiro},
abstractNote = {A systematic study of neutron-rich even-even Fe isotopes with a neutron number from 32 to 42 is carried out by using the projected shell model. Calculations are performed up to the spin I=20 state. Irregularities found in the yrast spectra and in B (E2) values are discussed in terms of neutron excitations to the high-j orbital g{sub 9/2}. Furthermore, the neutron two-quasiparticle structure of a low-K negative-parity band and the proton two-quasiparticle structure of a high-K positive-parity band are predicted to exist near the yrast region. Our study reveals a soft nature for the ground state of N{approx_equal}40 isotopes and emphasizes the important role of the neutron g{sub 9/2} orbital in determining the structure properties for both low- and high-spin states in these nuclei.},
doi = {10.1103/PHYSREVC.80.054306},
journal = {Physical Review. C, Nuclear Physics},
number = 5,
volume = 80,
place = {United States},
year = {Sun Nov 15 00:00:00 EST 2009},
month = {Sun Nov 15 00:00:00 EST 2009}
}