https://doi.org/10.1140/epja/i2010-10905-3
Regular Article - Experimental Physics
On the character of three 8+ states in 192Pb
1
Department of Nuclear Physics, Research School of Physics and Engineering, Australian National University, ACT 0200, Canberra, Australia
2
Department of Physics, Australian National University, ACT 0200, Canberra, Australia
3
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
* e-mail: Anna.Wilson@anu.edu.au
Received:
27
October
2009
Revised:
29
November
2009
Accepted:
2
December
2009
Published online:
9
January
2010
Three low-lying 8+ states have been identified in 192Pb . A newly observed cascade of -rays built directly on the 8+
1 state is compared to the previously identified, weakly rotational band above the 11-
i
13/2 , h
9/2 isomer in the same nucleus, and to analogous structures in 194Pb . The similarity of all four structures lends support to the suggestion that the 8+
1 configurations are of a similar oblate deformation to the 11- isomers. The excitation energies of all three 8+ states in 192Pb and 190Pb are compared to systematics. The possibility that one of the 8+ states in 192Pb is associated with a prolate shape is discounted.
© SIF, Springer-Verlag Berlin Heidelberg, 2010