Rutherford High Energy Laboratory, Chilton, Didcot, Berks, Bahamas
Abstract:
The low-lying levels of 18O with even parity form a rotational band. Longitudinal and transverse cross sections are calculated for all levels up to 7 MeV excitation energy. The deformed state is a system of two protons and two neutrons in the deformed s, d orbitals above the core 14C. Also matrix elements between spherical states are calculated using an effective charge n = 0.4 for neutrons and 1.4 for protons. The effective charge is determined by fitting theoretical and experimental quadrupole moments of 17O in the ground state. The effective charge in the calculation of the matrix elements between deformed states takes into account the 14C core deformation. As in ref. 11), too low transitions probabilities are found in comparison with experimental data.