The Beta-delayed neutron branching ratios (Pbn) for nuclei near doubly magic 78Ni have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital - spectroscopy of 238U fission products. The Pbn values for the very neutron-rich isotopes 76–78Cu and 83Ga were found to be much higher than previously reported and predicted. Revised calculations of the bn process, accounting for new mass measurements and an inversion of the 2p3=2 and 1f5=2 orbitals, are in better agreement with these new experimental results.
|Titolo:||Large beta-delayed neutron emission probabilities in the 78Ni region|
|Data di pubblicazione:||8-apr-2009|
|Digital Object Identifier (DOI):||10.1103/PhysRevLett.102.142502|
|Appare nelle tipologie:||01 - Articolo su periodico|