• Thermalization of a Lipkin-Meshkov-Glick model coupled to a bosonic bath 

      Louw, Jan C.; Kriel, Johannes N.; Kastner, Michael (American Physical Society, 2019)
      We derive a Lindblad master equation that approximates the dynamics of a Lipkin-Meshkov-Glick (LMG) model weakly coupled to a bosonic bath. By studying the time evolution of operators under the adjoint master equation we ...
    • Systematic experiments to quantitatively assess image quality for CT scans of a Karoo tetrapod fossil 

      Tshibalanganda, Muofhe; Du Plessis, Anton; Le Roux, Stephan G.; Taylor, Wendy L.; Smith, Roger M. H.; Browning, Claire (Evolutionary Studies Institute, 2019)
      Over the past decade non-destructive, three-dimensional visualization and analysis of fossils using X-ray tomography has greatly advanced palaeontological studies worldwide. Micro-computed tomography (microCT) is now ...
    • Strength of tensor forces from neutron drops in ab initio relativistic Brueckner-Hartree-Fock theory 

      Wang, Sibo; Tong, Hui; Zhao, Pengwei; Meng, Jie (American Physical Society, 2019)
      The evolution of spin-orbit splittings of neutron drops along with the neutron number and its connection with the tensor-force strength have been investigated systematically for different external fields in the relativistic ...
    • Spectroscopy of low-spin states in 157Dy : Search for evidence of enhanced octupole correlations 

      Majola, S. N. T.; Bark, R. A.; Bianco, L.; Bucher, T. D.; Bvumbi, S. P.; Cullen, D. M.; Garrett, P. E.; Greenlees, P. T.; Hartley, D.; Hirvonen, J.; Jakobsson, U.; Jones, P. M.; Julin, R.; Juutinen, S.; Ketelhut, S.; Kheswa, B. V.; Korichi, A.; Lawrie, E. A.; Masiteng, P. L.; Maqabuka, B.; Mdletshe, L.; Minkova, A.; Ndayishimye, J.; Nieminen, P.; Nyako, B. M.; Peura, P.; Rahkila, P.; Riedinger, L. L.; Riley, M.; Roux, D.; Ruotsalainen, P.; Saren, J.; Sharpey-Schafer, J. F.; Scholey, C.; Shirinda, O.; Sithole, A.; Sorri, J.; Stolze, S.; Timar, J.; Uusitalo, J.; Zimba, G. (American Physical Society, 2019)
      Low-spin states of ¹⁵⁷Dy have been studied using the JUROGAM II array, following the ¹⁵⁵Gd (α, 2n) reaction at a beam energy of 25 MeV. The level scheme of ¹⁵⁷Dy has been expanded with four new bands. Rotational structures ...
    • Rotational structures in 196Hg 

      Lawrie, J. J.; Lawrie, E. A.; Msezane, B.; Benatar, M.; Fedderke, M.; Mabala, G. K.; Mukherjee, S.; Mullins, S. M.; Mutshena, K. P.; Ncapayi, N. J.; Newman, R. T.; Sharpey-Schafer, J. F.; Smit, F. D.; Vymers, P. (American Physical Society, 2019)
      High spin states in ¹⁹⁶Hg were populated in the ¹⁹⁸Pt(α,6n) reaction at 65 MeV and γ−γ coincidence measurements were performed using the AFRODITE array at iThemba LABS. The level scheme was extended and new rotational bands ...
    • Relevance of neutron excess in nuclear matter to proton-induced composite-particle pre-equilibrium emission 

      Cowley, A. A. (Italian Physical Society, 2019)
      Formulation of the equation of state (EoS) of nuclear matter has far-reaching implications for issues ranging from the atomic nucleus to crucial aspects of astrophysics. Recent investigations of the influence of the ...
    • Rapid deconvolution of low-resolution time-of-flight data using Bayesian inference 

      Pieterse, Cornelius L.; De Kock, Michiel B.; Robertson, Wesley D.; Eggers, Hans C.; Miller, R. J. Dwayne (AIP Publishing LLC, 2019)
      The deconvolution of low-resolution time-of-flight data has numerous advantages, including the ability to extract additional information from the experimental data. We augment the well-known Lucy-Richardson deconvolution ...
    • Quantum kinetic perturbation theory for near-integrable spin chains with weak long-range interactions 

      Duval, Clement; Kastner, Michael (IOP Publishing, 2019)
      For a transverse-field Ising chain with weak long-range interactions we develop a perturbative scheme, based on quantum kinetic equations, around the integrable nearest-neighbour model. We introduce, discuss, and benchmark ...
    • Nuclear level densities and γ-ray strength functions of 180,181,182Ta 

      Brits, C. P.; Malatji, K. L.; Wiedeking, M.; Kheswa, B. V.; Goriely, S.; Garrote, F. L. Bello; Bleuel, D. L.; Giacoppo, F.; Gorgen, A.; Guttormsen, M.; Hadynska-Klek, K.; Hagen, T. W.; Hilaire, S.; Ingeberg, V. W.; Klintefjord, H. Jia M.; Larsen, A. C.; Majola, S. N. T.; Papka, P.; Peru, S.; Qi, B.; Renstrom, T.; Rose, S. J.; Sahin, E.; Siem, S.; Tveten, G. M.; Zeiser, F. (American Physical Society, 2019)
      Particle-γ coincidence experiments were performed at the Oslo Cyclotron Laboratory with the ¹⁸¹Ta(d,X) and ¹⁸¹Ta(³He,X) reactions to measure the nuclear level densities (NLDs) and γ-ray strength functions (γSFs) of ...
    • Investigation on the influence of the initial RDX crystal size on the performance of shaped charge warheads 

      Majiet, F.; Mostert, F. J. (KeAi Communications, 2019)
      Copper lined wave shaped shaped charges of particular design and liner metallurgy were used to investigate the effect of explosive crystal size on the resultant shaped charge jet parameters. Composition A3 with RDX of three ...
    • Generation of a frequency-degenerate four-photon entangled state using a silicon nanowire 

      Feng, Lan-Tian; Zhang, Ming; Zhou, Zhi-Yuan; Chen, Yang; Li, Ming; Dai, Dao-Xin; Ren, Hong-Liang; Guo, Guo-Ping; Guo, Guang-Can; Tame, Mark; Ren, Xi-Feng (Nature Research, 2019)
      Integrated photonics is becoming an ideal platform for generating two-photon entangled states with high brightness, high stability, and scalability. This high brightness and high quality of photon pair sources encourages ...
    • Evolution of the IVGDR and its fine structure from doubly-magic 40⁴°Ca to neutron-rich ⁴⁸Ca probed Using (p,p′) scattering 

      Latif, M. B.; Usman, I. T.; Carter, J.; Sideras-Haddad, E.; Donaldson, L .M.; Jingo, M.; Kureba, C. O.; Pellegri, L. (Jagellonian University, 2019)
      Experiments investigating the fine structure of the Isovector Giant Dipole Resonances (IVGDR) have been carried out on target nuclei 40,42,44,48Ca with 200 MeV proton inelastic scattering reactions using the high-energy ...
    • Evolution from quasivibrational to quasirotational structure in 155Tm and yrast 27/2− to 25/2− energy anomaly in the A ≈ 150 mass region 

      Liu, L.; Wang, S. Y.; Wang, S.; Hua, H.; Zhang, S. Q.; Meng, Jie; Bark, R. A.; Wyngaardt, S. M.; Qi, B.; Sun, D. P.; Liu, C.; Li, Z. Q.; Jia, H.; Li, X. Q.; Xu, C.; Li, Z. H.; Sun, J. J.; Zhu, L. H.; Jones, P.; Lawrie, E. A.; Lawrie, J. J.; Wiedeking, M.; Bucher, T. D.; Dinoko, T.; Makhathini, L.; Majola, S. N. T.; Noncolela, S. P.; Shirinda, O.; Gal, J.; Kalinka, G.; Molnar, J.; Nyako, B. M.; Timar, J.; Juhasz, K.; Arogunjo, M. (American Physical Society, 2019)
      Excited states in 155Tm have been populated via the reaction 144Sm(16O, p4n)155Tm at a beam energy of 118 MeV. The ground-state band has been extended and a new side band of the ground-state band is identified. E-GOS curves ...
    • Competition of rotation around the intermediate and long axes in 193Tl 

      Ndayishimye, J.; Lawrie, E. A.; Shirinda, O.; Easton, J. L.; Lawrie, J. J.; Wyngaardt, S. M.; Bark, R. A.; Bucher, T. D.; Bvumbi, S. P.; Dinoko, T. R. S.; Jones, P.; Kheswa, N. Y.; Majola, S. N. T.; Masiteng, P. L.; Negi, D.; Orce, J. N.; Sharpey-Schafer, J. F.; Wiedeking, M. (American Physical Society, 2019)
      High-spin states in ¹⁹³Tl were studied and the level scheme was revised and extended including the observation of new rotational bands. A surprising competition between bands built on the same πh9/2⊗νi13/2⁻² nucleon ...
    • Angular correlation measurement with the iThemba LABS segmented clover detector 

      Shirinda, O.; Lawriea, E. A.; Buchera, T. D.; Mthembua, S. H.; Dinoko, T. R. S.; Easton, J. L.; Mtshali, W. X.; Noncolela, S. P.; Duprez, D.; Lawrie, J. J. (Jagellonian University, 2019)
      Measurements of the angular correlation function W(θ) were performed with the iThemba LABS segmented clover detector. A set of measurements with radioactive sources and irradiated targets was carried out to check the ...
    • Advancing X-ray micro computed tomography in Africa : going far, together 

      Du Plessis, Anton; Le Roux, Stephan G.; Tshibalanganda, Muofhe (Elsevier, 2019)
      X-ray micro computed tomography (microCT) is a high resolution non-destructive materials imaging technology and is emerging as a powerful tool for industrial and scientific research applications. The aim of this review ...