Abstract
The Eurogam-2 array has been used to study rays emitted following the spontaneous fission of a source. Analysis of Doppler-broadened line shapes corresponding to decays from excited rotational states in neutron-rich Sr, Zr, and Mo fission fragments has enabled the first measurements of state lifetimes in these nuclei at around . The results are consistent with a predicted rotation-induced change in the triaxiality of the yrast states of the Mo isotopes that contrasts with the more stable behavior observed in the Zr and Sr nuclei.
- Received 21 December 1995
DOI:https://doi.org/10.1103/PhysRevLett.77.1711
©1996 American Physical Society