Abstract
The recently observed large cross sections for the Coulomb dissociation of 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 . We show that the experimental data can be well reproduced when the quadrupole deformation parameter of is around , at which the ground state takes the spin and parity of . 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 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 in the Nilsson model analysis. We discuss briefly also a possibility of the configuration with and .
- Received 21 March 2011
DOI:https://doi.org/10.1103/PhysRevC.83.041303
©2011 American Physical Society