Speaker
Dr
Robert Bark
(iThemba LABS)
Description
Recent results from investigations into nuclear chirality based on
experimental work at iThemba LABS is reviewed. New results[1], obtained
using the AFRODITE array, for 194Tl show a pair of four-quasiparticle
bands featuring what is perhaps the best example so far of chiral energy
degeneracy. In the mass 100 region, the nucleus 106Ag has been revisited
with extensive additions to the level scheme and measurements of
transition rates. Like 134Pr, it is a case where a crossing occurs between
chiral candidate bands. In this case, gamma-softness was conjectured to
play a role[2]. Our results suggest a completely different interpretation,
where the excited partner band is actually of four-quasiparticle
structure, itself a member of a chiral-vibrational structure.
[1] P.L. Masiteng et al, PLB 719, 83 (2013)
[2] P. Joshi et al PRL 98, 102501 92007)
Primary author
Dr
Robert Bark
(iThemba LABS)
