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Coulomb shifts and shape changes in the mass 70 region

Nara Singh, B.S., Steer, A.N., Jenkins, D.G., Wadsworth, R., Bentley, M.A., Davies, P.J., Glover, R., Pattabiraman, N.S., Lister, C.J., Grahn, T., Greenlees, P.T., Jones, P., Julin, R., Juutinen, S., Leino, M., Nyman, M., Pakarinen, J., Rahkila, P., Sarén, J., Scholey, C., Sorri, C., Uusitalo, J., Butler, P.A., Dimmock, M., Joss, D.T., Thomson, J., Cederwall, B., Hadinia, B. and Sandzelius, M. (2007) Coulomb shifts and shape changes in the mass 70 region. Physical Review C, 75 (6). 061301-4 PAGES. ISSN 1089-490X

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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.

Item Type: Article
Institution: The University of York
Academic Units: The University of York > Physics (York)
Depositing User: York RAE Import
Date Deposited: 24 Feb 2009 11:48
Last Modified: 24 Feb 2009 11:48
Published Version: http://dx.doi.org/10.1103/PhysRevC.75.061301
Status: Published
Publisher: The American Physical Society.
Identification Number: 10.1103/PhysRevC.75.061301
URI: http://eprints.whiterose.ac.uk/id/eprint/7244

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