Thesis

Studies From the gamma rays of prompt and delayed fission fragments: Deformation Proerties of Neutron Rich N uclei

Measurements of the Prompt and Delayed Radiation from Fission Fragments: Deformation Properties of Neutron Rich NucleiN. T. Brewer

Normal and Exotic Nuclear Deformations

The Nuclear Jahn Teller Effect [Senn, P. J. Chem. Ed. 1992]V=0

abArea A=a*bRelevant Nuclear Decay ProcessesFissionGamma DecayBeta Decay

Gamma Decay

Gamma Decay

Parity Change

Angular Momentum Change|Ii - If | 0 is an indication of deformation

1 is the limit of static deformation.

The ratio going to (2I-5)/(2I+1) indicates a coupling to a I=3 phonon in the limit of aligned vibration.

How can we display Static Octupole Deformation in a nucleus?

We would expect to see the energy displacement fluctuate about 0And we would expect to see the rotation frequency ratio tend toward 1 at high spin. So now I will show you some new high spin levels and we can examine these formulas in the light of new high spin states.96

2) Rotation induced condensation of octupole phonons

Reflection asymmetric Shape with two mirror planes andangular momentum perpendicular to one

S. FrauendorfPhys. Rev. C 77, 021304 (07)

0+2+4+6+3-5-7-9-Octupole vibrationStatic octupole deformation0 ph.1 ph.crossover

+-The strong admixture of the two-phonon octuople state into positive parity yrast states inhibits the neutron i13/2 alignment for Z66.The octupole phonons become less collective and less alignedfor N>90, Z>66. Condensation disappears. 84