Large -Delayed Neutron Emission Probabilities in the 78Ni Region

Large -Delayed Neutron Emission Probabilities in the 78Ni Region

The -delayed neutron branching ratios (P n) 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 P n values for the very neutron-rich isotopes 76 78Cu and 8...

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Bibliographic Details
Published in:Physical review letters Vol. 102; no. 14
Main Authors: Winger, J. A., Rykaczewski, Krzysztof Piotr, Gross, Carl J, Grzywacz, Robert Kazimierz, Shapira, Dan
Format: Journal Article
Language:English
Published: United States 01-01-2009
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Summary:The -delayed neutron branching ratios (P n) 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 P n 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 n 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.
Bibliography:DE-AC05-00OR22725
USDOE Office of Science (SC)
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.102.142502