Collectivity in the light xenon isotopes: A shell model study

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.064304· OSTI ID:21499256

Caurier, E; Nowacki, F; Sieja, K ^[1]; Poves, A ^[2]

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1. IPHC, IN2P3-CNRS et Universite Louis Pasteur, F-67037 Strasbourg (France)
2. Departamento de Fisica Teorica e IFT-UAM/CSIC, Universidad Autonoma de Madrid, E-28049 Madrid (Spain)

The lightest xenon isotopes are studied in the shell model framework, within a valence space that comprises all the orbits lying between the magic closures N=Z=50 and N=Z=82. The calculations produce collective deformed structures of triaxial nature that encompass nicely the known experimental data. Predictions are made for the (still unknown) N=Z nucleus {sup 108}Xe. The results are interpreted in terms of the competition between the quadrupole correlations enhanced by the pseudo-SU(3) structure of the positive parity orbits and the pairing correlations brought in by the 0h{sub 11/2} orbit. We also have studied the effect of the excitations from the {sup 100}Sn core on our predictions. We show that the backbending in this region is due to the alignment of two particles in the 0h{sub 11/2} orbit. In the N=Z case, one neutron and one proton align to J=11 and T=0. In {sup 110,112}Xe the alignment begins in the J=10, T=1 channel and it is dominantly of neutron-neutron type. Approaching the band termination the alignment of a neutron-proton pair to J=11 and T=0 takes over. In a more academic mood, we have studied the role of the isovector and isoscalar pairing correlations on the structure on the yrast bands of {sup 108,110}Xe and examined the possible existence of isovector and isoscalar pairing condensates in these N{approx}{approx}Z nuclei.

• OSTI ID: 21499256
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 6; Other Information: DOI: 10.1103/PhysRevC.82.064304; (c) 2010 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BACKBENDING
CORRELATIONS
DEFORMED NUCLEI
EXCITATION
FORECASTING
ISOVECTORS
NEUTRONS
ORBITS
PARTICLES
PROTONS
SHELL MODELS
TIN 100
XENON 110
XENON 112
ALPHA DECAY RADIOISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEI
NUCLEONS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
TENSORS
TIN ISOTOPES
VECTORS
XENON ISOTOPES