Molecule-like structure with covalent neutrons of F isotopes toward the neutron drip line
- Creative Research Initiative (CRIS), Hokkaido University, Sapporo 001-0021 (Japan)
The {alpha}-cluster structure of F isotopes has been studied based on antisymmetrized molecular dynamics. By using the constraint on the principal quantum number, various neutron configurations are investigated. It is found that a proton excitation into an sd shell does not necessarily induce {alpha} clustering in {sup 21}F and {sup 23}F. However, once one or two neutrons are excited into the pf shell together with a proton excitation, the core nuclei have {alpha} clustering. The calculation is extended toward the neutron drip line. The neutron-rich F isotopes also have {alpha} clustering in the excited states and their excitation energy greatly decreases toward the neutron drip line. The relation between the reduction of their excitation energies and the breaking of the neutron magic number N=20 is suggested.
- OSTI ID:
- 21499555
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 83, Issue 4; Other Information: DOI: 10.1103/PhysRevC.83.044304; (c) 2011 American Institute of Physics; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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ASYMMETRY
ATOMIC CLUSTERS
COVALENCE
EXCITATION
EXCITED STATES
FLUORINE 21
FLUORINE 23
MOLECULAR DYNAMICS METHOD
NEUTRON-RICH ISOTOPES
NEUTRONS
PROTONS
QUANTUM NUMBERS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCULATION METHODS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
FERMIONS
FLUORINE ISOTOPES
HADRONS
ISOTOPES
LIGHT NUCLEI
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES