Microscopic analysis of order parameters in nuclear quantum phase transitions

Journal Article · Tue Dec 15 00:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.061301· OSTI ID:21296556

Li, Z P ^[1]; Niksic, T ^[2]; Vretenar, D ^[2]; Meng, J ^[1]

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1. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871 (China)
2. Physics Department, Faculty of Science, University of Zagreb, HR-10000 Zagreb (Croatia)

Microscopic signatures of nuclear ground-state shape phase transitions in Nd isotopes are studied using excitation spectra and collective wave functions obtained by diagonalization of a five-dimensional Hamiltonian for quadrupole vibrational and rotational degrees of freedom, with parameters determined by constrained self-consistent relativistic mean-field calculations for triaxial shapes. As a function of the physical control parameter, the number of nucleons, energy gaps between the ground state and the excited vibrational states with zero angular momentum, isomer shifts, and monopole transition strengths exhibit sharp discontinuities at neutron number N=90, which is characteristic of a first-order quantum phase transition.

• OSTI ID: 21296556
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 80, Issue 6; Other Information: DOI: 10.1103/PhysRevC.80.061301; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
COLLECTIVE MODEL
COMPUTERIZED SIMULATION
DEGREES OF FREEDOM
ENERGY GAP
EXCITATION
GROUND STATES
HAMILTONIANS
ISOMER SHIFT
MEAN-FIELD THEORY
MONOPOLES
NEODYMIUM ISOTOPES
NEUTRONS
ORDER PARAMETERS
PHASE TRANSFORMATIONS
RELATIVISTIC RANGE
SPECTRA
VIBRATIONAL STATES
WAVE FUNCTIONS