Extremely long lived 65- 2 isomer in 213Fr

An isomeric state with a mean life of 4.5(2) μs and a spin of 65- 2 has been observed in Fr at an excitation energy of 8095 keV. A g-factor of 0.695(7) was measured for this state using the TDPAD method. The properties of this isomer agree very well with predictions of semi empirical shell model calculations when coupling to the 3 octupole vibration are included

High-spin structure of 167W and 168W

Excited states in W and W, populated in the Nd(Si, xn) reaction, were investigated at high spins using the ESSA30 array with 29 Compton-suppressed Ge detectors. The level schemes are extended to higher spins and several new rotational bands are identified. The results are discussed in comparison with existing data on the neighbouring N = 93 and 94 isotones and on the Z = 74W isotopes. A theoretical analysis is presented within the framework of a pairing-self-consistent cranked shell model using shape parameters obtained from total-routhian-surface calculations

Electromagnetic properties of high spin states in 154Dy

Liftimes and g factors of high spin states in 154Dy, populated in the 110Pd 48Ca,4n reaction, have been measured by the recoil distance and the recoil distance transient field methods, respectively. The experiments were carried out in coincidence mode using the multidetector arrays ESSA30 and TESSA3. A drastic loss of collectivity along the yrast line is observed, consistent with a change from prolate collective structures at low spin to predominantly oblate particle aligned structures at high spin. The g factors confirm the alignment of the s band and indicate contributions of proton alignment at higher spin

Electromagnetic properties of high-spin states in 154Dy^{154}Dy

Liftimes and g-factors of high-spin states in Dy, populated in the Pd(Ca,4n) reaction, have been measured by the recoil-distance and the recoil-distance transient field methods, respectively. The experiments were carried out in coincidence mode using the multidetector arrays ESSA30 and TESSA3. A drastic loss of collectivity along the yrast line is observed, consistent with a change from prolate collective structures at low spin to predominantly oblate particle-aligned structures at high spin. The g-factors confirm the νi alignment of the s-band and indicate contributions of proton alignment at higher spins