Speaker
Mr
Linda Mdletshe
(University of Zululand)
Description
The excited states of 162Yb have been studied at iThemba Laboratory for Accelerator Based Sciences (iThemba LABS), using the 150Sm (16O, 4n) 162Yb fusion-evaporation reaction. The beam of 83 MeV 16O was provided by the Separated-Sector Cyclotron (SSC) and used to bombard a 3 mg/cm2 150Sm target. The gamma rays emitted from the reaction products were detected using the AFRODITE gamma-ray spectrometer, comprised of 8 Compton-suppressed clover detectors. Attempts have been made in identifying the low-lying positive parity bands in 162Yb, particularly the beta and gamma vibrational bands, which are traditionally associated with the first excited Kπ = 0+ and Kπ = 2+ respectively. Many levels have been found. In particular the first excited 0+ band and the even and odd sequences of the gamma band have been firmly established. The 0+ band and the even spin members of the gamma band are observed to exhibit a Laundau-Zenner crossing. This crossing demonstrates that the signature splitting in gamma bands is mainly caused by band mixing. The data will be discussed in terms of the Triaxial Projected Shell Model and also with the predictions of the 5-Dimensional Collective Model (5-DCM).
Primary author
Mr
Linda Mdletshe
(University of Zululand)
Co-authors
Prof.
J. F Sharpey-Schafer
(University of the Western Cape)
Mr
M. A Sithole
(University of the Western Cape)
Ms
N. A Khumalo
(University of the Western Cape)
Dr
R. A Bark
(iThemba LABS)
Ms
S Jongile
(University of Zululand)
Dr
S. N. T Majola
(University of Zululand)
Dr
S. S Ntshangase
(University of Zululand)
Dr
T. S Dinoko
(iThemba LABS)
