Ground state properties and Coulomb dissociation of the deformed halo nucleus {sup 31}Ne

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.041303· OSTI ID:21499545

Urata, Y; Hagino, K ^[1]; Sagawa, H ^[2]

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1. Department of Physics, Tohoku University, Sendai, 980-8578 (Japan)
2. Center for Mathematics and Physics, University of Aizu, Aizu- Wakamatsu, Fukushima 965-8560 (Japan)

The recently observed large cross sections for the Coulomb dissociation of {sup 31}Ne nucleus indicate that this nucleus takes a halo structure in the ground state. We analyze these experimental data using the particle-rotor model that takes into account the rotational excitation of the core nucleus {sup 30}Ne. We show that the experimental data can be well reproduced when the quadrupole deformation parameter of {sup 30}Ne is around {beta}{sub 2}=0.2{approx}0.3, at which the ground state takes the spin and parity of I{sup {pi}}=3/2{sup -}. This state corresponds to the Nilsson level [330 1/2] in the adiabatic limit of the particle-rotor model. On the other hand, the state corresponding to the Nilsson level [321 3/2] with {beta}{sub 2}{approx}0.55 can be excluded when the finite excitation energy of the core is taken into account, even though this configuration is a candidate for the ground state of {sup 31}Ne in the Nilsson model analysis. We discuss briefly also a possibility of the I{sup {pi}}=1/2{sup +} configuration with {beta}{sub 2}{approx}1 and {beta}{sub 2}{approx}-0.4.

• OSTI ID: 21499545
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 4; Other Information: DOI: 10.1103/PhysRevC.83.041303; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CONFIGURATION
CROSS SECTIONS
DEFORMED NUCLEI
DISSOCIATION
EXCITATION
GROUND STATES
NEON 30
NEON 31
NILSSON-MOTTELSON MODEL
NUCLEAR HALOS
PARITY
PARTICLE-CORE COUPLING MODEL
SPIN
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MILLISECONDS LIVING RADIOISOTOPES
NEON ISOTOPES
NUCLEAR MODELS
NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES