Coulomb excitation of odd-A neutron-rich π(s-d) and ν(f-p) shell nuclei

A group of odd-mass neutron-rich nuclei with neutron excesses of 9-11 in the 13 less than or equal to Z less than or equal to 17 region has been produced and studied by in-beam intermediate-energy Coulomb excitation using an array of NaI(TI) detectors. The excitation energies of the observed states in Al-35, Si-37, P-39, S-41, S-43, and Cl-45 have been measured, and the B(E2) values connecting these states to the ground states have been extracted. For the S-41 and S-43 cases the measurements have been compared to particle-rotor and particle-vibrator calculations. The measurements for 41S are consistent with an interpretation of the low-energy behavior of this nucleus as rotations of a deformed core, whereas for S-43 no distinction can be made between the deformed (rotational) and spherical (vibrational) calculations. [S0556-2813(99)03502-5].