Conveners
Nuclear, Particle and Radiation Physics 1
- Simon Mullins (iThemba LABS (Gauteng))
Nuclear, Particle and Radiation Physics 1
- Sifiso Senzo Ntshangase (University of Cape Town / iThemba LABS)
Nuclear, Particle and Radiation Physics 1
- Pete Jones (iThemba LABS)
Nuclear, Particle and Radiation Physics 1
- Mathis Wiedeking (iThemba LABS)
Nuclear, Particle and Radiation Physics 1
- Robert Bark (iThemba LABS)
Nuclear, Particle and Radiation Physics 1
- Paul Papka (Stellenbosch University)
Nuclear, Particle and Radiation Physics 1
- Simon Mullins (iThemba LABS (Gauteng))
Nuclear, Particle and Radiation Physics 1
- John F Sharpey-Schafer (UWC)
Nuclear, Particle and Radiation Physics 1
- Luna Pellegri (University of Witwatersrand and iThemba LABs)
Nuclear, Particle and Radiation Physics 1
- Simon Mullins (iThemba LABS (Gauteng))
Nuclear, Particle and Radiation Physics 1
- Taofiq Ibrahim ()
Nuclear, Particle and Radiation Physics 1
- Simon Mullins (iThemba LABS)
Mr
ndinannyi justice mukwevho
(university of the western cape)
04/07/2017, 10:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The 9Be - 9B isospin doublet carries fundamental significance for both nuclear structure and nuclear astrophysics studies. The first excited ½+ state in 9Be is already well established. However, its isobaric analogue state in 9B has not been unambiguously determined yet. Theoretically, the 9B nucleus can either be described...
Dr
Mathis Wiedeking
(iThemba LABS)
04/07/2017, 10:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
An incredible wealth of information can be obtained from investigations of the low-energy tail of the Giant Electric Dipole Resonance. The Photon Strength Function (PSF), which represents the ability of nuclear matter to absorb and emit photons, is one of the quantities that is used successfully to extract resonance features in the region of the quasi-continuum. The PSF is one of the input...
Dr
Paul Papka
(Stellenbosch University)
04/07/2017, 11:10
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Coincidence measurement capability was implemented at the K600 spectrometer in order to achieve higher selectivity and to obtain more information in nuclear structure studies. This presentation gives an overview of the technical solutions and performance of the ancillary detectors available at the K600 spectrometer. Dedicated electronics were installed allowing up to 160 detector channels to...
Ms
Doris Kenfack
(University of Stellenbosch)
04/07/2017, 11:30
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Neutron-rich beams are being developed at iThemba LABS to study nuclear structure away from the stability. This is also the opportunity of deepening our understanding of astrophysical origin of elements. The primary beam is expected to be an intense 70 MeV proton beam. Several techniques using proton induced reactions have been developed to produce exotic nuclei. The interest of using (p,xp)...
Mr
Abraham Avaa
(Wits/iThemba)
04/07/2017, 11:50
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
An electron spectrometer that implement a Si(Li) detector for the detection of internal conversion electrons and a combination of LaBr3 detectors for the detection of coincident decays is undergoing development at iThemba LABS, South Africa. For optimization of measurements with the electron spectrometer, electron calibration sources (207Bi and 133Ba) are used in the measurements of energy and...
Dr
Lindsay Donaldson
(iThemba Laboratory for Accelerator Based Sciences)
04/07/2017, 14:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The shape transition of the Isovector Giant Dipole Resonance (IVGDR) from the spherical 142Nd to the deformed 150Nd nuclei in the even-even 142-150Nd chain has been established using proton inelastic scattering at zero degrees. Comparisons were made to previous photo-absorption results and some discrepancies were found which have implications for astrophysical...
Mr
Sunday Olorunfunmi
(University of the Witwatersrand, South Africa)
04/07/2017, 14:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Study of the Isoscalar Giant Monopole Resonance (ISGMR) provides insight into the incompressibility of the nuclear matter since it has a direct connection with the excitation energy of ISGMR. Nuclear incompressibility is an important quantity in the study of neutron stars and related astrophysics applications. In recent years, isotope dependence of the nuclear incompressibility has been mostly...
Ms
Harshna Jivan
(University of the Witwatersrand)
04/07/2017, 14:40
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
In this study, the low-lying electric dipole (E1) response referred to as the Pygmy Dipole Resonance (PDR) is investigated using the (α,α’γ) inelastic scattering reaction at 120 MeV on the deformed 154Sm nucleus. Coincidence experiments were performed at the iThemba LABS using the K600 magnetic spectrometer in 0° mode and BaGeL (Ball of Germanium...
Dr
Frederick David Smit
(iThemba LABS)
04/07/2017, 15:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The excitation region centered around 10 MeV in 12C is characterized by several broad overlapping states. Recent Anti-symmetrized Molecular Dynamics cluster calculations show that the Isoscalar Giant Monopole Resonance (ISGMR) may have two components and that the smaller amplitude oscillation may contribute to the strength in this region. It is proposed to measure the...
Dr
Retief Neveling
(iThemba LABS)
04/07/2017, 15:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The use of single-nucleon transfer reactions can be used to probe nucleon occupancies and vacancies. In heavier nuclei, the presence of high-spin orbitals (e.g. the g9/2 and h11/2 orbitals) makes these transfer reactions more difficult to carry out. One particular problem relates to the energy requirement for the incident particle used to populate highly excited contributions from these...
Mr
C.P. Brits
(iThemba LABS)
05/07/2017, 10:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Relatively small resonances on the low-energy tail of the giant electric dipole resonance such as the scissors or pygmy resonances can have significant impact on reaction rates. These rates are important input for modelling processes that take place in astrophysical environments and nuclear reactors. Recent results from the University of Oslo indicate the existence of a significant...
Mr
Ayanda Kunyana
(University of Zululand)
05/07/2017, 10:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Gamma-ray production cross sections were measured for strong gamma-ray lines excited in the proton bombardment of a calcium target. The cross sections were obtained for the reaction natCa(p, pγ)40Ca, with a proton beam in the energy range from 80 MeV to 125 MeV delivered by the SSC cyclotron at iThemba LABS. The gamma-rays were detected with the high-purity Ge detectors of the AFRODITE array...
Ms
Senamile Masango
(Student)
05/07/2017, 11:10
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The highly-efficient and segmented TIGRESS HPGe γ array at TRIUMF permits accurate Coulomb-excitation studies of the high-lying 2+1 states found in light nuclei with even number of protons and neutrons. A Coulomb-excitation measurement of 20Ne projectiles at safe energies has been carried out with the 110Pd(20Ne,20Ne)110Pd reaction at 64.7 MeV. A larger reduced transition probability of...
Mr
Nkanyiso Mantengu
(iThemba LABS)
05/07/2017, 11:30
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The design of iThemba LABS Accelerator Centre for Exotic (ACE) Isotopes facility was proposed to have four beam-lines
feeding the beam to two production vaults, with each vault having two production stations. The plan is to simultaneously operate one production station in both production vaults, meaning that only two opposite beam-lines will be delivering the beam at a time, with each of the...
Ms
Pheladi Molema
(Student)
05/07/2017, 11:50
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The study of 26 Mg level structure is of particular importance in nuclear structure physics because of its impact in the slow neutron capture process (s-process) for the nucleosynthesis of heavy elements up to lead. In fact, the 26 Mg is the compound nucleus for the s-process neutron source 22Ne (α, n)25 Mg that is one of the dominant reaction in the...
Mr
FEILIX MASOK
(University of Johannesburg)
05/07/2017, 14:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Uranium-238 (U-238) and thorium-232 (Th-232) are the parent primordial nuclides who along with their progenies are sources of radiation exposure to which humans are exposed directly or indirectly. U-238 decay to Pb-206 after 14 different alpha or beta decays, while Th-232 decay series terminate at Pb-208 after 10 successive alpha or beta decays. In this study, gross alpha and beta activity...
Mr
Botha Ryno
(University of the Western Cape and Stellenbosch University)
05/07/2017, 14:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The prospect of unconventional shale-gas development in the Karoo Basin (South Africa) has created the prerequisite to obtaining baseline data on natural radioactivity in Karoo groundwaters. The key natural occurring radioactive material (NORM) studied was radon (222Rn) in-water activity concentrations; however, supplementary radium (226Ra and 228Ra) in-water activity concentrations and...
179.
Efficiency calibration of the laboratory based gamma-ray detector for various sample geometries
Ms
Avuyile Sisanda Bulala
(University of Cape Town)
05/07/2017, 14:40
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Radioactivity has been present on earth since its formation and is part of the environment we live in. Humans are exposed every day to radioactivity through the radioactive elements that occur naturally in the environment. Radionuclides are found naturally in air, water, soil, plants and inside our bodies. The radionuclides we encounter in the environment can be classified into the following...
Ms
M Bashir
(Stellenbosch University and Ibrahim Badamasi Babangida University)
05/07/2017, 15:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
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...
Mr
Kehinde Olatunji
(Department of Science Laboratory Technology , Osun State College Of Technology, Esa-Oke,Osun State Nigeria)
05/07/2017, 15:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Terrestrial gamma radiation dose rates of Dangote cement industry Ibese Ogun state were measured using Digilert200. The mean outdoor terrestrial gamma dose rate is 137.16nGy/h with a range of 104.4nGy/h to 159.6nGy/h. Also, the annual effective dose ranged from 0.1600mSv/y to 0.2446mSv/y with a mean value of 0.210mSv/y. This value of mean annual effective dose of 0.210mSv/y is well below...
Dr
fhumulani nemulodi
(iThemba LABS)
06/07/2017, 10:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The transmission efficiency of some ion beams through the second solid-pole injector cyclotron (SPC2) at iThemba LABS requires improvement. In order to understand the beam optics in the injection line, and match the beam to the acceptance of the cyclotron, the beam envelope behavior from the beginning of injection-line to the inside of the SPC2 cyclotron was investigated with different...
Mr
Muneer Sakildien
(iThemba LABS)
06/07/2017, 10:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Various techniques are applied to Electron Cyclotron Resonance Ion Sources (ECRIS) to enhance high charge state ion beam production, but many of these remain not well understood. With Kα plasma diagnostics it is possible to develop a greater understanding of these techniques and in so doing improve the performance of the ion source for high charge state production. Two of the most commonly...
Ms
Linina Jurbandam
(University of Witwatersrand)
06/07/2017, 11:10
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The knowledge of the fission Q-value is important for the safety analysis of a nuclear reactor. It is around 200MeV/fission in all nuclear reactors, being the energy released from radiative capture (Qϒc), the main source of differences between reactors. In this work, we present a detailed calculation of Qϒc produced in SAFARI-1 using the MCNP-5 (Monte Carlo N-Particle) code. MCNP is a...
Mr
Jason Webster
(University of Stellenbosch)
06/07/2017, 11:30
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Charged particles following curved paths are known to produce synchrotron radiation. This radiation causes a power loss that serves as a limiting factor when producing high energy particle collisions, particularly when the radius of curvature is small or the speed is close to c. Typically, one makes use of the electron in such high energy experiments and treats this as a classical...
Mr
Maurice Mashau
(Necsa)
06/07/2017, 11:50
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
This study forms part of the on-going IAEA Coordinated Research Project (CRP) which primarily focuses on benchmarking computational tools against experimental data for research reactors. It is important to benchmark these tools against experimental data as part of evaluating their capabilities in simulating physical phenomena which take place during reactor operation. Necsa has recently...
Mr
Nogwanya Thembalethu
(UWC)
06/07/2017, 12:10
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Electron-mediated nuclear plasma interactions (NPIs), such as Nuclear Excita-
tion by Electron Capture (NEEC) or Transition (NEET), may have significant
impact on nuclear cross sections in High Energy Density Plasmas (HEDPs).
These HEDP environments are found in the cosmos where nucleosynthesis takes
place. Attempts have failed so far in measuring the NEEC process [1], while
NEET has...
Mr
Mohamed Kamil
(University of the Western Cape)
06/07/2017, 14:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The study of proton unbound states in 32Cl is important both in the context of nuclear structure and astrophysics. In this presentation we discuss the results from a recent experiment study of such states using the 32S(3He,t) reaction and the K600 spectrometer at iThemba LABS. Unbound protons from recoiling 32Cl nuclei were detected using the CAKE silicon array placed upstream of the target,...
Mr
Khanyisa Sowazi
(University of the Western Cape)
06/07/2017, 14:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
An increasing number of experiments reveal the presence of a low-energy enhancement in the gamma-ray strength function (GSF). The GSF, which is the ability of nuclei to absorb and emit &gamma rays, provides insight into the statistical properties of atomic nuclei. For this project the GSF was studied for 74Ge which was populated in the reaction 74Ge(p,p’)74Ge...
Mr
Kgashane Malatji
(SU)
06/07/2017, 14:40
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
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...
Ms
Bernadette Rebeiro
(University of the Western Cape)
06/07/2017, 15:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
At present there are several large scale experiments ongoing world-wide that aim to find experimental evidence of physics beyond the standard model (SM). Most of these experiments involve either deep underground low-background measurements or high-energy collider physics. An alternative method to look for signatures of new physics is via precision tests of fundamental symmetries assumed in...
Dr
Simon Mullins
(iThemba LABS (Gauteng))
06/07/2017, 16:10
Mr
Boniface Dimitri Christel Kimene Kaya
(Stellenbosch University)
07/07/2017, 10:00
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
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
Wasiu Yahya
(Stellenbosch University)
07/07/2017, 10:20
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The ground state properties of unstable nuclei are studied using the following relativistic mean field (RMF) models: QHDI, QHDII, NL3, and FSUGold. The bound state wave functions obtained from these RMF calculations are then folded with the nucleon--nucleon (NN) interaction to obtain the nuclear optical potential. Two models for the NN interaction are considered: the IA1 parametrization, and a...
Dr
Ioan Dancus
(ELI-NP)
07/07/2017, 11:10
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
Extreme Light Infrastructure – Nuclear Physics (ELI-NP) will be a new Center for Scientific Research to be built by the National Institute of Physics and Nuclear Engineering (IFIN-HH) in Bucharest-Magurele, Romania. The Extreme Light Infrastructure was included in the 2006 Roadmap of the European Strategic Forum for Research Infrastructure (ESFRI). ELI-NP is a complex facility which will host...
Dr
Florin Negoita
(ELI-NP)
07/07/2017, 11:30
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
ELI-NP facility, the Nuclear Physics pillar of the Extreme Light Infracture under construction in Europe, will host a High Power Laser System delivering two laser beam with powers up to 10 PW and a Gamma Beam System providing high intensity, narrow bandwidth, gamma ray of tunable energy up to 20 MeV. The current achivements on proton and heavy ions acceleration with exiting 1 PW laser...
Dr
Robert Bark
(iThemba LABS)
07/07/2017, 12:10
Track B - Nuclear, Particle and Radiation Physics
Oral Presentation
The iThemba LABS' Radioactive-Ion Beam project has evolved into SAIF - the South African Isotope Facility. It has two phases, the first of which comprises the Low-Energy Radioactive-Ion Beam (LERIB) project and ACE Isotopes (Accelerator Centre for Exotic Isotopes) project. ACE isotopes calls for the installation of a commercial, off-the-shelf 70 MeV cyclotron for radionuclide production. It...
