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  1. Article

    Open Access

    Management of cardiac drugs in a critical care setting

    M Mallick, J Walkington, A Gratrix, R Pretorius in Critical Care (2012)

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  2. No Access

    Article

    Thin-film compound phase formation at Fe–Ge and Cr–Ge interfaces

    Phase formation was studied in the Fe–Ge and Cr–Ge thin-film systems by means of Rutherford backscattering spectrometry and x-ray diffraction. In the Fe–Ge system, FeGe was the first phase to form while in the...

    O. M. Ndwandwe, C. C. Theron, T. K. Marais, R. Pretorius in Journal of Materials Research (2003)

  3. No Access

    Article

    CEMS Investigations of Fe-Silicide Phases Formed by the Method of Concentration Controlled Phase Selection

    Conversion electron Mössbauer spectroscopy (CEMS) measurements have been made on Fe-silcide samples formed using the method of concentration controlled phase selection. To prepare the samples a 10 nm layer of Fe3...

    M. K. Moodley, K. Bharuth-Ram, H. de Waal, R. Pretorius in Hyperfine Interactions (2002)

  4. No Access

    Article

    Controlled Phase Formation by Using a Diffusion Barrier - The Fe-Si REACTION

    By analogy to reactive deposition epitaxy and titanium interlayer mediated epitaxy experiments, an attempt has been made to constrain the supply of reactants to the reaction interface in the solid phase reacti...

    C. C. Theron, A. Falepin, S. Degroote, J. Dekoster… in MRS Online Proceedings Library (1999)

  5. No Access

    Article

    Formation of buried Sb dopant profiles in silicon by pulsed laser epitaxy

    In this investigation buried Sb dopant profiles in single crystal silicon have been formed from evaporated layers using laser annealing. For irradiations carried out in air, severe oxidation of the surface lay...

    R. J. Carolissen, D. K. Knoesen, W. C. Sinke, R. Pretorius in Journal of Materials Research (1993)

  6. No Access

    Article

    Oxidation Effects During the Formation of Buried Sb Dopant Profiles in Silicon Using Pulsed Laser Epitaxy

    Severe oxidation inhibited epitaxy when buried Sb profiles in single crystal silicon were formed from evaporated layers irradiated in atmosphere with a pulsed Q-switched ruby laser. Oxygen concentrations as hi...

    Randall J. Carolissen, R. Pretorius in MRS Online Proceedings Library (1991)

  7. No Access

    Article

    Prediction of First Phase Formation at Au-METAL Interfaces Using the Effective Heat of Formation Model

    The effective heat of formation model enables heats of formation to be calculated as a function of concentration. By choosing the effective concentration at the growth interface to be that of the liquidus mini...

    R. Pretorius, T. K. Marais, A. E. Muller, D. Knoesen in MRS Online Proceedings Library (1991)

  8. No Access

    Article

    The Reaction between Thin Ni and Co Films and Their Disilicides

    Rutherford backscattering has been used to study metal/disilicide thin film interactions for Ni and Co. Upon heating, the metal first reacted with the disilicide to form Ni2Si and Co2Si, respectively. After compl...

    E. C. Cahoon, C. M. Comrie, R. Pretorius in MRS Online Proceedings Library (1983)

  9. No Access

    Article

    Prediction of Silicide First Phase and Phase Sequence from Heats of Formation

    An effective heat of formation (ΔH′) is formulated, enabling ΔH′ to be calculated as a function of the concentration of metal and silicon available for interaction to form a silicide. A rule for first phase fo...

    R. Pretorius in MRS Online Proceedings Library (1983)

  10. No Access

    Article

    Co2Si, CrSi2, ZrSi2 and TiSi2 Formation Studied by a Radioactive 31Si Marker Technique

    Radioactive 31Si (half-life, 2.62 h) was used as a marker to study Co2Si, CrSi2, TiSi2 and ZrSi2 formation. By marking the initial layer of silicide with radioactive silicon atoms and by measuring the activity pr...

    A. P. Botha, R. Pretorius in MRS Online Proceedings Library (1981)

  11. No Access

    Article

    Level lifetimes in NII and NIII: Apparatus and results

    The construction of a beamfoil target chamber for level lifetime determinations is described. Results obtained for NII and NIII levels are compared to values obtained by other authors, as well as theoretical v...

    J. A. Brink, F. J. Coetzer, J. H. I. Olivier… in Zeitschrift für Physik A Atoms and Nuclei (1978)

  12. No Access

    Article

    The isotopic analysis of boron by the coincident measurement of complementary particles

    The coincident measurement of both nuclear reaction products at their complementary angles was used for the isotopic analysis of boron by the reactions10B(d,p)11B and11B(d,α)9Be. Both isotopes were determined sim...

    P. P. Coetzee, R. Pretorius, M. Peisach in Journal of Radioanalytical Chemistry (1975)

  13. No Access

    Article

    The elemental and isotopic determination of lithium by the coincidence measurement of complementary particles

    The coincident measurement of both nuclear products at their complementary angles was used to determine6Li by the reactions6Li(d, α)4He and6Li(p, α)3He, and7Li by the reaction7Li(p, α)4He. Elemental lithium was d...

    R. Pretorius, P. P. Coetze, M. Peisach in Journal of Radioanalytical Chemistry (1973)

  14. No Access

    Article

    Analysis of glass by simultaneous spectrometry of scattered alpha particles and prompt protons

    The energy spectrum of alpha particles scattered from a beam of 4 MeV was used to determine heavy elements and oxygen and silicon in glass. Simultaneously, but with a separate detector, the energy spectrum of ...

    M. Peisach, R. Pretorius in Journal of Radioanalytical Chemistry (1973)

  15. No Access

    Article

    Isotopic analysis of lithium by prompt alpha measurement during deuteron irradiation

    Charged particle spectrometry was used to determine the isotopic concentration of lithium in lithium fluoride targets irradiated with a deuteron beam of 4.0 MeV. Alpha particles emitted by the6Li(d, α)4He and7Li(...

    R. Pretorius, P. Coetzee in Journal of Radioanalytical Chemistry (1972)

  16. No Access

    Article

    Deuteron activation analysis of geological samples

    Deuteron activation was found to be suitable for analysing geological samples, as no interfering activities are formed from oxygen, silicon and aluminium, which together make up more than 80% by weight of the ...

    R. Pretorius, F. Odendaal, M. Peisach in Journal of Radioanalytical Chemistry (1972)

  17. No Access

    Article

    Alpha activation of calcium and its possible use for analysis

    This method is based upon the measurement of 3.95-hr43Sc which is formed during α-activation from40Ca, the most abundant (96.8%) isotope of calcium. The excitation function for the40Ca(α, p)43Sc reaction was dete...

    R. Pretorius, E. A. Schweikert in Journal of Radioanalytical Chemistry (1971)

  18. No Access

    Article

    The determination of carbon, nitrogen and oxygen in gases by neutron time-of-flight spectrometry

    Carbon, nitrogen and oxygen were determined in gases by time-of-flight spectrometry of prompt neutrons from the respective reactions12C(d, n)13N,14N(d, n)15O and16O(d, n)17F, produced by a pulsed beam of deuteron...

    W. J. Naudé, M. Peisach, R. Pretorius… in Journal of Radioanalytical Chemistry (1968)