Large β-delayed neutron emission probabilities in the Ni78 region

Authors

J. A. Winger, Mississippi State University
S. V. Ilyushkin, Mississippi State University
K. P. Rykaczewski, ORNL Physics Division
C. J. Gross, ORNL Physics Division
J. C. Batchelder, Oak Ridge Associated Universities
C. Goodin, Vanderbilt University
R. Grzywacz, ORNL Physics Division
J. H. Hamilton, Vanderbilt University
A. Korgul, Vanderbilt University
W. Królas, Joint Institute for Heavy-Ion Reactions
S. N. Liddick, Oak Ridge Associated Universities
C. Mazzocchi, The University of Tennessee, Knoxville
S. Padgett, The University of Tennessee, Knoxville
A. Piechaczek, Louisiana State University
M. M. Rajabali, The University of Tennessee, Knoxville
D. Shapira, ORNL Physics Division
E. F. Zganjar, Louisiana State University
I. N. Borzov, GSI Helmholtz Centre for Heavy Ion Research GmbH

Document Type

Article

Publication Date

4-6-2009

Abstract

The β-delayed neutron branching ratios (Pβn) for nuclei near doubly magic Ni78 have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital β-γ spectroscopy of U238 fission products. The Pβn values for the very neutron-rich isotopes Cu76-78 and Ga83 were found to be much higher than previously reported and predicted. Revised calculations of the βn process, accounting for new mass measurements and an inversion of the π2p3/2 and π1f5/2 orbitals, are in better agreement with these new experimental results. © 2009 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review Letters

Recommended Citation

Winger, J., Ilyushkin, S., Rykaczewski, K., Gross, C., Batchelder, J., Goodin, C., Grzywacz, R., Hamilton, J., Korgul, A., Królas, W., Liddick, S., Mazzocchi, C., Padgett, S., Piechaczek, A., Rajabali, M., Shapira, D., Zganjar, E., & Borzov, I. (2009). Large β-delayed neutron emission probabilities in the Ni78 region. Physical Review Letters, 102 (14) https://doi.org/10.1103/PhysRevLett.102.142502