A5087221730- Nuclear physics research studies
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
- Quantum Chromodynamics and Particle Interactions
- Superconducting Materials and Applications
- Nuclear reactor physics and engineering
- Luminescence Properties of Advanced Materials
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Advanced Thermoelectric Materials and Devices
- Neutrino Physics Research
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Glass properties and applications
- Muon and positron interactions and applications
- Dark Matter and Cosmic Phenomena
- Flow Measurement and Analysis
- Electron Spin Resonance Studies
- Seed and Plant Biochemistry
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Gas Sensing Nanomaterials and Sensors
- Astrophysics and Cosmic Phenomena
- Crystallography and Radiation Phenomena
- Physics of Superconductivity and Magnetism
Drexel University
2024
University of the Witwatersrand
2014-2024
iThemba Laboratory
2022-2024
Czech Technical University in Prague
2024
Obafemi Awolowo University
2011-2023
KU Leuven
2022
Joint Research Center
2021
Proton inelastic scattering experiments at energy Ep=200MeV and a spectrometer angle of 0° were performed on 144,146,148,150Nd 152Sm exciting the IsoVector Giant Dipole Resonance (IVGDR). Comparison with results from photo-absorption reveals shift resonance maxima towards higher energies for vibrational transitional nuclei. The extracted cross sections in most deformed nuclei, 150Nd 152Sm, exhibit pronounced asymmetry rather than distinct double-hump structure expected as signature...
Background: Inelastic proton scattering at energies of a few hundred MeV and very-forward angles including $0^\circ$ has been established as tool to study electric-dipole strength distributions in nuclei. The present work reports systematic investigation the chain stable even-mass Nd isotopes representing transition from spherical quadrupole-deformed Purpose: Extraction equivalent photo-absorption cross sections analysis their fine structure energy region IsoVector Giant Dipole Resonance...
Background: In highly deformed nuclei, there is a noticeable coupling of the isoscalar giant monopole resonance (ISGMR) and K=0 component quadrupole (ISGQR), which results in double peak structure (IS0) strength (a narrow low-energy deformation-induced main broad ISGMR part). The energy low-lying IS0 sensitive to both incompressibility modulus K∞ between (IS2) strength. Purpose: This study aims investigate two-peaked prolate Mg24 oblate Si28 nuclei identify among variety density functionals...
The fine structure of the IsoVector Giant Dipole Resonance (IVGDR) in doubly-magic nuclei 40,48Ca observed inelastic proton scattering experiments under 0∘ is used to investigate role different mechanisms contributing IVGDR decay width. Characteristic energy scales are extracted from by means wavelet analysis. experimental compared theoretical approaches allowing for inclusion complex configurations beyond mean-field level. Calculations performed framework RPA and beyond-RPA a relativistic...
Fission barrier heights of short-lived nuclei away from line $\ensuremath{\beta}$ stability are not known reliably. Low-energy fission $^{210}\mathrm{Fr}$ and $^{210}\mathrm{Ra}$, produced by ($d,p$) ($d,n$) transfer reaction on the re-accelerated unstable beam $^{209}\mathrm{Fr}$ was investigated at HIE-ISOLDE. Four Timepix3 pixel detectors were installed body ACTAR TPC demonstrator chamber. Polyethylene converters used for detection fast neutrons. Since no significant background observed,...
Neutrinoless double beta decay is one of the most sensitive probes for new physics beyond Standard Model particle physics. One isotopes under investigation <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Xe</a:mi><a:mprescripts/><a:none/><a:mn>136</a:mn></a:mmultiscripts></a:math>, which would into <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mmultiscripts><b:mi>Ba</b:mi><b:mprescripts/><b:none/><b:mn>136</b:mn></b:mmultiscripts></b:math>. Detecting...
Tin (II) sulfide (SnS) is a metal chalcogenide semiconducting material with fascinating and admirable physical features for practical applications in solid‐state batteries, photodetectors, gas sensors, optoelectronic devices, emission transistors, photocatalysis among others. The energy gap of SnS semiconductor nanomaterial that facilitates its usefulness many can be adjusted through dopant incorporation which results crystal lattice distortion at various crystallite sizes the semiconductor....
Zinc selenide (ZnSe) nanomaterial is a binary semiconducting material with unique features, such as high chemical stability, photosensitivity, low cost, great excitation binding energy, non-toxicity, and tunable direct wide band gap. These characteristics contribute significantly to its usage sensors, optical filters, photo-catalysts, recording materials, photovoltaics, among others. The light energy harvesting capacity of this can be enhanced tailored meet the required application demand...
Background: Over the past two decades high energy-resolution inelastic proton scattering studies were used to gain an understanding of origin fine structure observed in isoscalar giant quadrupole resonance (ISGQR) and isovector dipole (IVGDR). Recently, monopole (ISGMR) 58Ni, 90Zr, 120Sn, 208Pb was studied at iThemba Laboratory for Accelerator Based Sciences (iThemba LABS) by means α-particle very forward angles (including 0∘). The good energy resolution measurement revealed significant...
Electron-neutrino charged-current interactions with xenon nuclei were modeled in the nEXO neutrinoless double-<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>β</a:mi></a:math> decay detector (<c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mo>∼</c:mo><c:mn>5</c:mn></c:math> metric ton, 90% <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"...
Background: Inelastic $\ensuremath{\alpha}$-particle scattering at energies of a few hundred MeV and very-forward angles including 0\ifmmode^\circ\else\textdegree\fi{} has been established as tool for the study isoscalar giant monopole (IS0) strength distributions in nuclei. This compressional mode nuclear excitation can be used to derive incompressibility matter.Purpose: An independent investigation IS0 nuclei across wide mass range was performed using ${0}^{\ensuremath{\circ}}$ facility...
Over the past two decades high energy-resolution inelastic proton scattering studies were used to gain an understanding of origin fine structure observed in isoscalar giant quadrupole resonance (ISGQR) and isovector dipole (IVGDR). Recently, monopole (ISGMR) $^{58}$Ni, $^{90}$Zr, $^{120}$Sn $^{208}$Pb was studied at iThemba Laboratory for Accelerator Based Sciences (iThemba LABS) by means $\alpha$-particle very forward angles (including $0\circ$). The good energy resolution measurement...
The low temperature peak (PI) of natural fluorite which occurs at 94oC the heating rate β = 1 Cs-1exhibits complexity both in terms shape and position as absorbed dose is varied. short lifetime this makes it a good case for testing existing thermoluminescence kinetic models. In paper, parameters PI, namely activation energy, EA , frequency factor, S, order kinetics, b, have been evaluated using general kinetics. Fluorite samples were irradiated with dose-rate (40 μGys-1 ) β- irradiation...
On
The fine structure of the IsoVector Giant Dipole Resonance (IVGDR) in doubly-magic nuclei $^{40,48}$Ca observed inelastic proton scattering experiments under $0^\circ$ is used to investigate role different mechanisms contributing IVGDR decay width. Characteristic energy scales are extracted from by means wavelet analysis. experimental compared theoretical approaches allowing for inclusion complex configurations beyond mean-field level. Calculations performed framework RPA and beyond-RPA a...
Abstract Gamma ray transmission method for void faction measurement studies is in rare use Nigeria, especially industries and research. The study used this to determine the cross-sectional fraction of two-phase water flow through a Polyvinyl chloride (PVC) pipechannel. gamma-ray counts transmitted pipe were recorded calculate using semi-empirical approach. Void ratio values varying from 0.171 – 0.036 obtained rates ranging between 0.5gal/min - 4.0gal/min at estimated constant air rate....
African locus beans (Parkia biglobosa) tree is a perennial legume that grows naturally in Africa and one of the trees Forest Rangers enforced farmers must preserve their farmland because its usefulness. Parkia biglobosa when fermented can be used to produce Iru other useful products. This work employed Particle Induced X-ray Emission (PIXE) determination major, minor trace element constituents leaves, seeds, stem from Igbope, using 2.5 MeV proton ion beam analysis (IBA) facility. The samples...
Proton inelastic scattering experiments at energy E_p = 200 MeV and a spectrometer angle of 0 degree were performed on 144,146,148,150Nd 152Sm exciting the IsoVector Giant Dipole Resonance (IVGDR). Comparison with results from photo-absorption reveals shift resonance maxima towards higher energies for vibrational transitional nuclei. The extracted cross sections in most deformed nuclei, 150Nd 152Sm, exhibit pronounced asymmetry rather than distinct double-hump structure expected as signature...
Abstract Extensive experimental investigations into understanding the fine structure of giant resonances in nuclei across periodic table have been carried out recent years using state-of-the-art K600 magnetic spectrometer iThemba LABS, Cape Town, South Africa. Based on established results comparison to various theoretical calculations, it has found that observed different resonances, namely Isoscalar Giant Quadrupole Resonance (ISGQR), Isovector Dipole (IVGDR) and Monopole (ISGMR), light...