SHELL CLOSURE EFFECTS IN THE STABLE SE-74-82 ISOTOPES FROM MAGNETIC-MOMENT MEASUREMENTS USING PROJECTILE EXCITATION AND THE TRANSIENT FIELDTECHNIQUE

Projectile excitation and the transient field technique have been used to measure the g factors of the 2(1)(+), 2(2)(+), and 4(1)(+) states in Se74-82 in order to study the influence of the N=50 shell closure a t low excitation energies. The states of interest were populated by Co ulomb exciting beams of the appropriate isotope by the same natural Si target. The results demonstrate that inverse kinematics provides a ve ry powerful technique, highly suitable for measurements with radioacti ve beams. The g factors obtained for Se74-82 are compared with results from IBM-II calculations. [S0556-2813(98)02005-6].