University of Liverpool logo - link to  homepage
Nuclear Physics Group
Home
Physics Department
Conferences
Seminars
Useful Links
IT Resources
E-Mail

Feedback:
support@ns.ph.liv.ac.uk

Octupole Nuclei

The region of the periodic chart which has shown the best evidence for octupole instability in the nuclear ground state is around Z = 88-90 and N around 134. These nuclei have low-lying negative parity states and relatively strong B(E1) values for the transitions between the bands of opposite parity; in the case of 226Ra large B(E3) values have been measured consistent with its interpretation as a rotating pear shape. The very inaccessibility of these far-from-stability nuclei has, however, meant that there are large gaps in our knowledge of octupole effects in heavy nuclei. Complete measurements of the high-spin behaviour of the yrast octupole band only exist for the isotopes of Th. For the Ra isotopes such measurements are available for the weakly quadrupole coupled 218,220Ra and the strongly coupled 226Ra. There is only a limited amount of data on 224Ra and virtually no information exists for 222Ra. The U isotopes with N around 132 are predicted to have the largest octupole correlations, but there is no information about the low lying structure of these nuclei.

Highlights of Recent Results

Click on the green buttons to follow the links.

First Identification of Gamma Decay fron U-226
Research carried out at Jurosphere
Studies of Octupole Nuclei
Search for Hyperdeformation in Uranium Isotopes