Dr
Shaun Wyngaardt
(Stellenbosch University)
The nuclear cluster models has extensively been used to understand some of the structural properties of nuclear matter. A number of theoretical models have been developed since the discovery that alpha decay could be conceptually understood as the expulsion of a correlated subset of four nucleons from the parent nucleus. This presentation will give a brief overview of the most popular nuclear...
Ms
Senamile Masango
(University of the Western Cape)
The Coulomb-excitation process with the combination of highly-efficient $\gamma$ and particle detector systems present a great tool to study quadrupole collectivity in nuclei and probing
nuclear-structure properties. This process employs the well-known Coulomb interaction and selectively excites collective nuclear states which decay back to the ground state through
$\gamma$-ray transitions....
Mr
Linda Mdletshe
(University of Zululand)
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...
Ms
SANDILE JONGILE
(UNIVERSITY OF ZULULAND)
Over the past two decades there has been controversy as to whether deformed nuclei are subject to quadrupole vibrations (γ and β), particularly the β vibrations. Pertaining the gamma(K=2+) vibrations, experimental evidence has been more or less consistent, confirming they indeed exist. On the other hand the situation remains elusive for the β vibrations which are characterized by...
Dr
taofiq ibrahim
(Stellenbosch University)
Local core -cluster interaction of Saxon-Woods type functional form with parameters
derived from Michigan-3-Yukawa (M3Y) microscopic potential model have been used to investigate the decay properties of heavy and superheavy nuclei.
Further applications of the potential model to the low lying spectra of heavy nuclei reveals its inadequacy in the internal structure consistent with earlier...
Ms
Munirat Bashir
(Stellenbosch University/iThemba)
LaBr3:Ce detectors have been shown to be 1.2–1.65 times more efficient than NaI:Tl detectors above 350 keV, for 3.8 cm×3.8 cm (1.5 in.×1.5 in.) detectors and have an energy resolution of 2.5–3% at the 662 keV gamma-line of 137Cs, compared to 6–7% for NaI:Tl detectors[1]. The detector crystal has other advantages such as a high scintillation light output with a fast decay time[2]. An array of...
Dr
Jian Li
(College of physics, jilin university)
Following the previously observed chiral doublet bands in $^{126}$Cs, a new pair of chiral doublet bands has been proposed. Both two pairs are based on the identical configuration $\pi h_{11/2}\otimes\nu h_{11/2}$ and may be another candidate of novel type of multiple chiral doublets (“yrast” and “excited” M$\chi$D) first observed in $^{103}$Rh. Theoretical calculations within covariant...
Dr
Obed Shirinda
(iThemba LABS/Stellenbosch University)
A nuclear chiral system is formed when the total angular momentum of the nucleus is aplanar, i.e. when it has significant projections along all three nuclear axes [1]. Most important for the identification of chiral bands is to establish a pair of ∆I = 1 bands that are near-degenerate in energy, but also in B(M1) and B(E2) transition probabilities [1]. Up to date, chiral candidates showing...
Prof.
Ligang Cao
(School of Mathematics and Physics, North China Electric Power University, Beijing 102206, China)
We have extended the Hartree-Fock and Random Phase Approximation method to calculate the multipole giant resonances of hypernuclei within the Skyrme energy density functional self-consistently. This means that the same Skyrme interactions, including the nucleon-nucleon, nucleon-hyperon as well as hyperon-hyperon interaction, are adopted in the calculation of the properties of ground states and...
Mr
Christel Kimene Kaya
(Stellenbosch University)
The atomic nucleus is a complex many-body interacting system, which exhibits a underlying correlated set of nucleon states. The clustering model is one of the most reliable models that predicts the strongly correlated subsystem of nucleons closed to the threshold decay of nuclei. The binary-cluster model describes the structure and decay properties of super-heavy nuclei.
The...
Mr
Kgashane Malatji
(Physics Department, University of Stellenbosch, Matieland, 7602, South Africa)
Most stable and extremely low abundance proton-rich nuclei with A>110 are thought to be produced by the photodisintegration of s- and r- process seed nuclei. However, this so-called p-process is insufficient to explain the observed low abundance (0.012%) of the 180Ta isotope. Hence combinations of several processes are considered to reproduce the observed...
Ms
BERNADETTE REBEIRO
(UNIVERSITY OF THE WESTERN CAPE, SOUTH AFRICA)
In addition to establishing the Majorana nature of neutrinos, obtaining the absolute neutrino mass scale is now the focus of several large-scale neutrinoless double beta decay experiments.
The current challenge in determining the neutrino mass accurately depends of calculation of nuclear matrix elements (NME's) in the select nuclei where these decays can take place. It is well known that the...
Prof.
John F Sharpey-Schafer
(University of Western Cape)
The concept of configuration dependent pairing does not usually appear in the textbooks and is rarely considered in the literature. The resulting lowering of excited 0n+ states into the pairing gap in even-even deformed nuclei accounts for many states that have traditionally been assumed to arise from time-dependent “β vibrations” of the nuclear shape along the symmetry axis. The experimental...
Mr
Bonginkosi Richard Zikhali
(University of Zululand)
The nuclear level density (NLD) and
-ray strength function (
SF) are quantities that give
essential information about the behaviour of a nucleus at high excitation energy. NLD is dened
as the number of levels per unit of excitation energy.
SF is dened as a measure of the average
reduced
decay probability of a nucleus. These concepts are useful at high excitation energies
where the...
Hongfeng LU
(College of Science, China Agricultural University)
Covariant density functional theory can well describe the bulk and single-particle
properties of nuclei in a self-consistent way. Typical neutron-rich Lambda-hypernuclei 12Be and 16C are investigated within covariant density functional theory. The bulk properties of mean field, meson-nucleon tensor coupling, spin-orbit term, behaviors of neutrons are focused.
Ms
Nontobeko Khumalo
(University of the Western Cape)
The search for triaxial strongly deformed (TSD) structures in the rare earth region of the nuclear chart has been of interest recently. These structures have been predicted to occur for over 35 years [1]. The main aim of this project is to comprehensively study the nuclear spectroscopy of $^{162}$Hf at low and high spins and to search for TSD structures. The research is also part of an...
