Abstract
A group of odd-mass neutron-rich nuclei with neutron excesses of 9–11 in the region has been produced and studied by in-beam intermediate-energy Coulomb excitation using an array of NaI(Tl) detectors. The excitation energies of the observed states in and have been measured, and the values connecting these states to the ground states have been extracted. For the and cases the measurements have been compared to particle-rotor and particle-vibrator calculations. The measurements for are consistent with an interpretation of the low-energy behavior of this nucleus as rotations of a deformed core, whereas for no distinction can be made between the deformed (rotational) and spherical (vibrational) calculations.
- Received 11 September 1998
DOI:https://doi.org/10.1103/PhysRevC.59.642
©1999 American Physical Society