L. Mdletshe
A5025899014- Nuclear physics research studies
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Astronomical and nuclear sciences
- Rare-earth and actinide compounds
- Nuclear Physics and Applications
- Advanced NMR Techniques and Applications
- Quantum Chromodynamics and Particle Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Physics of Superconductivity and Magnetism
- Superconducting and THz Device Technology
- X-ray Diffraction in Crystallography
- Crystal Structures and Properties
University of Zululand
2018-2024
iThemba Laboratory
2018-2024
National Research Foundation
2019-2022
Three ΔI=1 bands with the πg_{9/2}⊗νg_{9/2} configuration have been identified in _{35}^{74}Br_{39}. Angular distribution, linear polarization, and lifetime measurements were performed to determine multipolarity, type, mixing ratio, absolute transition probability of transitions. By comparing these experimental observations corresponding fingerprints quantum particle rotor model calculations, second third lowest are, respectively, suggested as chiral partner one-phonon wobbling excitation...
A comprehensive systematic study is made for the collective β and γ bands in even-even isotopes with neutron numbers N=88 to 92 proton Z=62(Sm) 70 (Yb). Data, including excitation energies, B(E0) B(E2) values, branching ratios from previously published experiments are collated new data presented first time this study. The experimental compared calculations using a five-dimensional Hamiltonian (5DCH) based on covariant density functional theory (CDFT). realistic potential quadrupole shape...
The spectroscopy of $^{71}\mathrm{Ge}$ has been investigated via the fusion-evaporation reaction $^{74}\mathrm{Ge}(\ensuremath{\alpha},\ensuremath{\alpha}3n)^{71}\mathrm{Ge}$. Collective structures including a rotational band built on $15/{2}^{\ensuremath{-}}$ octupole state in have established. observation strong $E1$ transitions and well-behaved sequence provide first experimental evidence an Ge isotopes, suggesting enhanced correlation around $N=40$ $A\ensuremath{\approx}70$ region. A...
High-spin states in $^{74}\mathrm{As}$ were studied using the $^{74}\mathrm{Ge}(^{4}\mathrm{He},1p3n)$ reaction at beam energies of 58.6 and 62.6 MeV. Two positive- one negative-parity bands have been identified $^{74}\mathrm{As}$. The two positive-parity are interpreted as chiral doublet bands, which is supported by triaxial particle rotor model. Three electric dipole transitions linking yrast also observed this work, suggesting existence octupole correlations
The spectroscopy of 62Cu is studied via the 54Cr(12C,1p3n)62Cu fusion-evaporation reaction. On basis γ−γ coincidence analysis, angular distributions from oriented states, and linear polarization measurement, three positive-parity negative-parity level sequences in are observed, including two new γ-ray transitions one level. collective structures discussed terms tilted axis cranking covariant density functional theory. Although not firmly confirmed experiment, properties a magnetic rotational...
Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following $^{155}\mathrm{Gd}(\ensuremath{\alpha},2n)^{157}\mathrm{Dy}$ $^{148}\mathrm{Nd}(^{12}\mathrm{C},5n)^{155}\mathrm{Dy}$ reactions 25 65 MeV, respectively. We report high-$K$ bands, which are conjectured to be first candidates of a ${K}^{\ensuremath{\pi}}={2}^{+}\ensuremath{\gamma}$ vibrational band, built on $[505]11/{2}^{\ensuremath{-}}$ neutron orbital, in both...
Low-spin states of 157Dy have been studied using the JUROGAM II array, following 155Gd (α, 2n) reaction at a beam energy 25 MeV. The level scheme has expanded with four new bands. Rotational structures built on [523]5/2− and [402]3/2+ neutron orbitals constitute additions to as do many inter- intraband transitions. This manuscript also reports observation cross I+→(I–1)− I−→(I–1)+ E1 dipole transitions interlinking (band 5) 7) orbitals. These interlacing band are interpreted bands parity...
High-spin states in 76As have been observed for the first time by using 4He+74Ge reaction at beam energies of 58.6 and 62.6 MeV. Two positive-parity three negative-parity bands found 76As. The two with πg9/2⊗νg9/2 configurations are tentatively interpreted as chiral doublet bands, which supported triaxial particle rotor model calculations. electric dipole transitions linking yrast positive- also this work, implying possible presence octupole correlations 76As.Received 29 July 2023Accepted 23...
Low- and medium-spin negative-parity bands of $^{187}\mathrm{Os}$ have been studied using the AFRican Omnipurpose Detector for Innovative Techniques Experiments (AFRODITE) array, following $^{186}\mathrm{W}(^{4}\mathrm{He},3n)^{187}\mathrm{Os}$ reaction at a beam energy 37 MeV. In current work, all previously known significantly extended three new added to level scheme. The angular distribution ratio (${R}_{\mathrm{AD}}$) polarization measurements used assign spin parity observed levels....
The collective structures of 75Ge have been studied for the first time via 74Ge(α,2p1n)75Ge fusion-evaporation reaction. Two negative-parity bands and one tentative positive-parity band built on νp1/2,νf5/2, νg9/2 states, respectively, are established compared with in neighboring N=43 isotones. According to configuration-constrained potential-energy surface calculations, a shape transition from oblate prolate along isotopic chain odd-A Ge isotopes is suggested occur at 75Ge. properties...
Excited states in 131Ba and 133Ce were studied using in-beam γ-ray spectroscopy through the 122Sn(13C,4n)131Ba 125Te(12C,4n)133Ce reactions, respectively. A strongly coupled band, associated with νg7/2[404]7/2+ configuration, was identified 133Ce. It is first time to observe bands N=75 isotones. The signature partners exhibit considerable energy splitting comparison those πg7/2[404]7/2+ odd-A Ta Re isotopes. Extensive cranked shell model quasiparticle-plus-triaxial-rotor calculations reveal...
Background: The shape of most nuclei is described by its quadrupole deformation (showing the deviation from spherical shape) and triaxiality axial symmetry). Nuclei affected show additional collective rotational bands, called $\ensuremath{\gamma}$ that appear at low excitation energy. bands can be caused precession a nucleus with triaxial shape, but also arise small vibrations around an axially symmetric shape.Purpose: aim this work to search for new excitations in $^{187}\mathrm{Os}$...
Collective structures in $^{186}\mathrm{Os}$ have been investigated through the $^{186}\mathrm{W}(^{4}\mathrm{He},4n)^{186}\mathrm{Os}$ reaction, at a beam energy of 48 MeV. The low-lying bands built on excited $0{}_{2}^{+}, 2{}_{2}^{+}$, and $4{}_{3}^{+}$ states extended up to spins ${12}^{+}, {15}^{+}$, ${8}^{+}$, respectively, number new linking transitions were identified. features collective $^{186}\mathrm{Os}$, such as level energies, are presented context systematic study neighboring...