LIFETIMES IN NEUTRON-RICH MASS 100 NUCLEI MEASURED BY A DOPPLER PROFILE METHOD

摘要

The Eurogam-1 array has been used to study γ rays emitted following the spontaneous fission of a ~(248)Cm source. The stopping of the fission fragments in the source material leads to Doppler-broadened γ-ray lineshapes for those states that have lifetimes comparable to the stopping time. From the analysis of these lineshapes the transition quadrupole moments for the Yrast states in the neutron-rich nuclei ~(100,102)Zr and ~(104,106)Mo in the spin range 6-12 h have been deduced.