Recent Submissions

  • Manufacturing and characterization of in-situ alloyed Ti6Al4V(ELI)-3 at.% Cu by laser powder bed fusion 

    Vilardell, A. M.; Yadroitsev, I.; Yadroitsava, I.; Albu, M.; Takata, N.; Kobashi, M.; Krakhmalev, P.; Kouprianoff, D.; Kothleitne, G.; Du Plessis, A. (Elsevier, 2020)
    Biofunctionalization of Ti6Al4V alloy with metallic agents like Ag or Cu is a promising approach to add anti-bacterial properties and thus to reduce the risk of implant failure. This research investigates the in-situ ...
  • 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 ...
  • 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 ...
  • Re-estimation of 180Ta nucleosynthesis in light of newly constrained reaction rates 

    Malatji, K. L.; Wiedeking, M.; Goriely, S.; Brits, C. P.; Kheswa, B. V.; Bello Garrote, F. L.; Bleuel, D. L.; Giacoppo, F.; Gorgen, A.; Guttormsen, M.; Hadynska-Klek, K.; Hagen, T. W.; Ingeberg, V. W.; Klintefjord, M.; Larsen, A. C.; Papka, P.; Renstrom, T.; Sahin, E.; Siem, S.; Siess, L.; Tveten, G. M.; Zeiser, F. (Elsevier, 2019-03-12)
    Recent measurements of the nuclear level densities and γ-ray strength functions below the neutron thresholds in 180,181,182Ta are used as input in the nuclear reaction code TALYS. These experimental average quantities are ...
  • Interplay of dynamical and structure effects in the observables for 12C(p,2p) near 400 MeV with polarized and unpolarized beams 

    Mecca, A.; Cravo, E.; Deltuva, A.; Crespo, R.; Cowley, A. A.; Arriaga, A.; Wiringa, R. B.; Noro, T. (Elsevier, 2019-10-01)
    We investigate the interplay of reaction mechanism and structure effects in the calculated cross sections and polarization observables for the direct 12C(p, 2p)reaction near 400 MeV around the Quasi Free Scattering (QFS) ...
  • New candidate chiral nucleus in the A ≈ 80 mass region : 82 35 Br 47 

    Liu, C.; Wang, S. Y.; Qi, B.; Wang, S.; Sun, D. P.; Li, Z. Q.; Bark, R. A.; Jones, P.; Lawrie, J. J.; Masebi, L.; Wiedeking, M.; Meng, J.; Zhang, S. Q.; Hua, H.; Li, X. Q.; Li, C. G.; Han, R.; Wyngaardt, S. M.; Sun, B. H.; Zhu, L. H.; Bucher, T. D.; Kheswa, B. V.; Malatji, K. L.; Ndayishimye, J.; Shirinda, O.; Dinoko, T.; Khumalo, N.; Lawrie, E. A.; Ntshangase, S. S. (American Physical Society, 2019-11-07)
    A pair of nearly degenerate positive-parity bands were observed in 82 Br for the first time using the 82 Se(α,p3n) reaction. The positive-parity doublet bands are proposed to be chiral doublet bands based on the triaxial ...
  • “Stapler” mechanism for a dipole band in 79Se 

    Li, C. G.; Chen, Q. B.; Zhang, S. Q.; Xu, C.; Hua, H.; Wang, S. Y.; Bark, R. A.; Wyngaardt, S. M.; Shi, Z.; Dai, A. C.; Wang, C. G.; Li, X. Q.; Li, Z. H.; Meng, J.; Xu, F. R.; Ye, Y. L.; Jiang, D. X.; Han, R.; Niu, C. Y.; Chen, Z. Q.; Wu, H. Y.; Wang, X.; Luo, D. W.; Wu, C. G.; Wang, S.; Sun, D. P.; Liu, C.; Li, Z. Q.; Sun, B. H.; Jones, P.; Msebi, L.; Sharpey-Schafer, J. F.; Dinoko, T.; Lawrie, E. A.; Ntshangase, S. S.; Kheswa, B. V.; Shirinda, O.; Khumalo, N.; Bucher, T. D.; Malatji, K. L. (American Physical Society, 2019-10-24)
    The spectroscopy of 79 Se is studied via the 82 Se(α, α3n)79Se fusion-evaporation reaction. A negative-parity magnetic dipole band in 79Se is established for the first time. Based on the calculations by the self-consistent ...
  • β and γ bands in N = 88 , 90, and 92 isotones investigated with a five-dimensional collective Hamiltonian based on covariant density functional theory : vibrations, shape coexistence, and superdeformation 

    Majola, S. N. T.; Shi, Z.; Song, B. Y.; Li, Z. P.; Zhang, S. Q.; Bark, R. A.; Sharpey-Schafer, J. F.; Aschman, D. G.; Bvumbi, S. P.; Bucher, T. D.; Cullen, D. M.; Dinoko, T. S.; Easton, J. E.; Erasmus, N.; Greenlees, P. T.; Hartley, D. J.; Hirvonen, J.; Korichi, A.; Jakobsson, U.; Jones, P.; Jongile, S.; Julin, R.; Juutinen, S.; Ketelhut, S.; Kheswa, B. V.; Khumalo, N. A.; Lawrie, E. A.; Lawrie, J. J.; Lindsay, R.; Madiba, T. E.; Makhathini, L.; Maliage, S. M.; Maqabuka, B.; Malatji, K. L.; Masiteng, P. L.; Mashita, P. I.; Mdletshe, L.; Minkova, A.; Msebi, L.; Mullins, S. M.; Ndayishimye, J.; Negi, D.; Netshiya, A.; Newman, R.; Ntshangase, S. S.; Ntshodu, R.; Msebi, L.; Mullins, S. M.; Ndayishimye, J.; Negi, D.; Netshiya, A.; Newman, R.; Ntshangase, S. S.; Ntshodu, R.; Nyako, B. M.; Papka, P.; Peura, P.; Rahkila, P.; Riedinger, L. L.; Riley, M. A.; Roux, D. G.; Ruotsalainen, P.; Saren, J. J.; Scholey, C.; Shirinda, O.; Sithole, M. A.; Sorri, J.; Stankiewicz, M.; Stolze, S.; Timar, J.; Uusitalo, J.; Vymers, P. A.; Wiedeking, M.; Zimba, G. L. (American Physical Society, 2019-06-05)
    A comprehensive systematic study is made for the collective β and γ bands in even-even isotopes with neutron numbers N = 88 to 92 and proton numbers Z = 62 (Sm) to 70 (Yb). Data, including excitation energies, B(E0) and ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Stochastic gradient annealed importance sampling for efficient online marginal likelihood estimation 

    Cameron, Scott A.; Eggers, Hans C.; Kroon, Steve (MDPI, 2019-11-12)
    We consider estimating the marginal likelihood in settings with independent and identically distributed (i.i.d.) data. We propose estimating the predictive distributions in a sequential factorization of the marginal ...
  • 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 ...

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