Abstract
The -delayed neutron branching ratios () for nuclei near doubly magic have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital spectroscopy of fission products. The values for the very neutron-rich isotopes and were found to be much higher than previously reported and predicted. Revised calculations of the process, accounting for new mass measurements and an inversion of the and orbitals, are in better agreement with these new experimental results.
- Received 21 January 2009
DOI:https://doi.org/10.1103/PhysRevLett.102.142502
©2009 American Physical Society