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Title: Charge-exchange modes of excitation in deformed neutron-rich nuclei

Gamow-Teller (GT) mode of excitation and β-decay properties of deformed neutron-rich even-N Zr isotopes are investigated in a self-consistent Skyrme energy-density-functional approach, in which the Hartree-Fock-Bogoliubov equation is solved in the coordinate space and the proton-neutron Quasiparticle-RPA equation is solved in the quasiparticle basis. It is found that a stronger collectivity is generated for the GT giant resonance as an increase in the neutron number. Furthermore, we find that the T = 0 pairing enhances the low-lying GT strengths cooperatively with the T = 1 pairing correlation depending on the microscopic structure of the low-lying mode and the shell structure around the Fermi levels, and that the enhanced strength shortens the β-decay half-lives by at most an order of magnitude.
Authors:
 [1] ;  [2]
  1. Graduate School of Science and Technology, Niigata University, Niigata 950-2181 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
22492476
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1681; Journal Issue: 1; Conference: Nuclear Structure and Dynamics '15: 3. international nuclear physics conference on nuclear structure and dynamics, Portoroz (Slovenia), 14-19 Jun 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BETA DECAY; CHARGE EXCHANGE; DEFORMED NUCLEI; EVEN-EVEN NUCLEI; EXCITATION; FERMI LEVEL; GAMOW-TELLER RULES; GIANT RESONANCE; HARTREE-FOCK-BOGOLYUBOV THEORY; NEUTRON-RICH ISOTOPES; NEUTRONS; PROTONS; QUASI PARTICLES; RANDOM PHASE APPROXIMATION; SKYRME POTENTIAL; ZIRCONIUM ISOTOPES