Article ID Journal Published Year Pages File Type
8196527 Physics Letters B 2007 5 Pages PDF
Abstract
The first excited state of the most neutron-rich beryllium isotope, 14Be, has been studied by inelastic scattering with a 12C target at 68MeV/nucleon. The state has been observed at Ex=1.54(13)MeV, and its spin-parity has been determined as Jπ=2+ from the measurement of the angular distribution. This provides a complete set of energies of the first 2+ states in the beryllium isotopic chain. The extracted deformation length of 14Be has been found to be substantially smaller than that of the neighboring nucleus 12Be, in which the N=8 shell closure is quenched, indicating hindered collectivity in the 14Be nucleus.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Nuclear and High Energy Physics
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