Coulomb shifts and shape changes in the mass 70 region
Abstract
The technique of recoil beta tagging has been developed which allows prompt gamma decays in nuclei from excited states to be correlated with electrons from their subsequent short-lived beta decay. This technique is ideal for studying nuclei very far from stability and improves in sensitivity for very short-lived decays and for high decay Q-values. The method has allowed excited states in 78Y to be observed for the first time, as well as an extension in the knowledge of T=1 states in 74Rb. From this new information it has been possible to compare Coulomb energy differences (CED) between T=1 states in 70Br/70Se, 74Rb/74Kr, and 78Y/78Sr. The A=70 CED exhibit an anomalous behavior which is inconsistent with all other known CED. This behavior may be accounted for qualitatively in terms of small variations in the Coulomb energy arising from shape changes.
Keywords
Cite
@article{arxiv.0706.3365,
title = {Coulomb shifts and shape changes in the mass 70 region},
author = {B. S. Nara Singh and A. N. Steer and D. G. Jenkins and R. Wadsworth and M. A. Bentley and P. J. Davies and R. Glover and N. S. Pattabiraman and C. J. Lister and T. Grahn and P. T. Greenlees and P. Jones and R. Julin and S. Juutinen and M. Leino and M. Nyman and J. Pakarinen and P. Rahkila and J. Saren and C. Scholey and J. Sorri and J. Uusitalo and P. A. Butler and M. Dimmock and D. T. Joss and J. Thomson and B. Cederwall and B. Hadinia and M. Sandzelius},
journal= {arXiv preprint arXiv:0706.3365},
year = {2009}
}
Comments
10 pages, 2 figures