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  1. Article ; Online: Pairing of thorium with selected primary target materials in tandem configurations: Co-production of

    Steyn, G F / Motetshwane, M A / Szelecsényi, F / Brümmer, J W

    Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

    2020  Volume 168, Page(s) 109514

    Abstract: Several radionuclide production facilities based on a new generation of high-current, 70 MeV ... ...

    Abstract Several radionuclide production facilities based on a new generation of high-current, 70 MeV H
    Language English
    Publishing date 2020-11-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 1142596-9
    ISSN 1872-9800 ; 0883-2889 ; 0969-8043
    ISSN (online) 1872-9800
    ISSN 0883-2889 ; 0969-8043
    DOI 10.1016/j.apradiso.2020.109514
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Production of (28)Mg by bombardment of (nat)Cl with 200MeV protons: Proof-of-concept study for a stacked LiCl target.

    van der Meulen, N P / Steyn, G F / Vermeulen, C / van Rooyen, T J

    Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

    2016  Volume 115, Page(s) 125–132

    Abstract: A stacked target consisting of ten Al-encapsulated LiCl discs, for producing (28)Mg via the (nat)Cl(p,X)(28)Mg process in the energy region 50-200MeV, is described. This target was irradiated with a 200MeV beam at an intensity of 100nA, providing ... ...

    Abstract A stacked target consisting of ten Al-encapsulated LiCl discs, for producing (28)Mg via the (nat)Cl(p,X)(28)Mg process in the energy region 50-200MeV, is described. This target was irradiated with a 200MeV beam at an intensity of 100nA, providing information on both yield and outscattering losses. Results of a Monte Carlo modelling of the beam and target, by means of the code MCNPX, are also presented. Similar Al-encapsulated LiCl discs were individually irradiated with 66MeV proton beams of 65 and 90μA, respectively, to study their behaviour under high-intensity bombardment. Once removed from the Al encapsulation, the (28)Mg can be separated from the LiCl target material efficiently, using a 12.5cm x 1cm(2) column containing Purolite S950 chelating resin. The eluate contains (7)Be but no other measurable radio-contaminants. The removal of the (7)Be contaminant is performed by cation exchange chromatography in malate media, with (28)Mg being retained by the resin and (7)Be eluted.
    Language English
    Publishing date 2016-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 1142596-9
    ISSN 1872-9800 ; 0883-2889 ; 0969-8043
    ISSN (online) 1872-9800
    ISSN 0883-2889 ; 0969-8043
    DOI 10.1016/j.apradiso.2016.04.026
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Large-scale production of

    Steyn, G F / van der Walt, T N / Szelecsényi, F / Perrang, C / Brümmer, J W / Vermeulen, C / van der Meulen, N P / Motetshwane, M A / van Heerden, M R

    Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

    2020  Volume 168, Page(s) 109469

    Abstract: The large-scale production ... ...

    Abstract The large-scale production of
    Language English
    Publishing date 2020-10-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1142596-9
    ISSN 1872-9800 ; 0883-2889 ; 0969-8043
    ISSN (online) 1872-9800
    ISSN 0883-2889 ; 0969-8043
    DOI 10.1016/j.apradiso.2020.109469
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Concurrent spectrometry of annihilation radiation and characteristic gamma-rays for activity assessment of selected positron emitters.

    Dolley, S G / Steyn, G F / van Rooyen, T J / Szelecsényi, F / Kovács, Z / Vermeulen, C / van der Meulen, N P

    Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

    2017  Volume 129, Page(s) 76–86

    Abstract: A method is described to determine the activity of non-pure positron emitters in a radionuclide production environment by assessing the 511keV annihilation radiation concurrently with selected γ-lines, using a single High-Purity Germanium (HPGe) detector. ...

    Abstract A method is described to determine the activity of non-pure positron emitters in a radionuclide production environment by assessing the 511keV annihilation radiation concurrently with selected γ-lines, using a single High-Purity Germanium (HPGe) detector. Liquid sources of
    Language English
    Publishing date 2017-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 1142596-9
    ISSN 1872-9800 ; 0883-2889 ; 0969-8043
    ISSN (online) 1872-9800
    ISSN 0883-2889 ; 0969-8043
    DOI 10.1016/j.apradiso.2017.07.057
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Book: Single-nuclear transfer to unbound states in the 4HE([alpha], 3He)5He and 4He([alpha], t)5Li reactions at 120, 160 and 200 MeV

    Steyn, G. F

    (NAC report ; 97-02)

    1997  

    Author's details G. F. Steyn
    Series title NAC report ; 97-02
    Language English
    Size 11 Bl, graph. Darst
    Publisher National Accelerator Centre
    Publishing place Faure
    Document type Book
    ISBN 0798855002 ; 9780798855006
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  6. Article ; Online: The production of ⁸²Sr using larger format RbCl targets.

    Meulen, N P van der / Walt, T N van der / Steyn, G F / Raubenheimer, H G

    Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

    2013  Volume 72, Page(s) 96–99

    Abstract: The production of (82)Sr at iThemba LABS is performed by the proton bombardment of a RbCl target using the facility's Vertical-Beam Target Station (VBTS). (82)Sr is separated from the target material using a method based on target dissolution, using ... ...

    Abstract The production of (82)Sr at iThemba LABS is performed by the proton bombardment of a RbCl target using the facility's Vertical-Beam Target Station (VBTS). (82)Sr is separated from the target material using a method based on target dissolution, using dilute ammonium chloride solution, and the use of chromatographic methods on Purolite S950 ion exchange resin. After performing a further purification step using AG MP-50 macroporous cation exchange resin, the result is a product with a high radionuclidic purity and negligible Rb and Fe impurity content.
    Language English
    Publishing date 2013-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 1142596-9
    ISSN 1872-9800 ; 0883-2889 ; 0969-8043
    ISSN (online) 1872-9800
    ISSN 0883-2889 ; 0969-8043
    DOI 10.1016/j.apradiso.2012.09.017
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Restructuring the South African electricity supply industry

    Steyn, Grové

    Utilities policy : governance, performance, analysis 5 ,2, S. 95-108

    appropriate governance in a newly democratized South Africa

    1995  

    Author's details Grové Steyn
    Keywords Elektrizitätswirtschaft ; Südafrika
    Language English
    Publisher Elsevier Science
    Publishing place Amsterdam
    Document type Article
    ZDB-ID 1092528-4
    ISSN 0957-1787
    Database ECONomics Information System

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  8. Article: A review of physical and socio-economic characteristics and intervention approaches of informal settlements

    Wekesa, B.W / Steyn, G.S / Otieno, F.A.O. (Fred)

    Habitat international. 2011 Apr., v. 35, no. 2

    2011  

    Abstract: Informal settlements provide shelter to millions of poor urban dwellers in developing countries. Using a literature survey, this paper reviews physical and socio-economic characteristics and the factors attributed to proliferation of the informal ... ...

    Abstract Informal settlements provide shelter to millions of poor urban dwellers in developing countries. Using a literature survey, this paper reviews physical and socio-economic characteristics and the factors attributed to proliferation of the informal settlements and intervention approaches. The main objective was to establish how such settlements could be improved and hence the quality of life of majority of the urban population. Physical and socio-economic conditions found in informal settlements are generally hazardous to health and tend to exacerbate the severe socio-economic conditions of the urban poor as well as environmental pollution and degradation of the local ecosystems. Proliferation of the informal settlements, particularly in most cities of developing countries is as a result of market and public policy failure for a significant segment of the urban poor population. The intervention approaches starting back in the 1950s include strengthening of public institutions and creation of policies and legislations to address the living environments of the urban poor, reforming building codes and standards, involvement of the private sector in housing provisions and programmes targeting both rural and urban development. Critical examination of these measures suggests the need for self-determination. In addition to these programmes, particularly informal settlement upgrading, this paper advocates the need for building technologies that are responsive to the urban poor and their environment. These are technologies that empowers the urban poor communities to make their own contribution to the process of improving their living conditions and hence the quality of life.
    Keywords cities ; developing countries ; ecosystems ; laws and regulations ; markets ; pollution ; private sector ; public policy ; quality of life ; socioeconomics ; surveys ; urban areas ; urban development ; urban population
    Language English
    Dates of publication 2011-04
    Size p. 238-245.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2001576-8
    ISSN 0197-3975
    ISSN 0197-3975
    DOI 10.1016/j.habitatint.2010.09.006
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: The role of traditional leafy vegetables in the food security of rural households in South Africa

    Vorster, H.J / Van Rensburg, W.S.J / Stevens, J.B / Steyn, G.J

    Acta horticulturae. 2009 Jan., no. 806 (1)

    2009  

    Keywords green leafy vegetables ; rural population ; food security ; villages ; indigenous knowledge ; food preparation ; South Africa
    Language English
    Dates of publication 2009-01
    Size p. 223-228.
    Document type Article
    Note Paper presented at the International Symposium on Underutilized Plants for Food Security, Nutrition, Income and Sustainability Development, Volume 1, held March 3-6, 2008, Arusha, Tanzania.
    ISSN 0567-7572
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: The use of selective volatization in the separation of 68Ge from irradiated Ga targets.

    van der Meulen, N P / Dolley, S G / Steyn, G F / van der Walt, T N / Raubenheimer, H G

    Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

    2011  Volume 69, Issue 5, Page(s) 727–731

    Abstract: Cyclotron-produced (68)Ge can be separated from its Ga target material by dissolving the target in aqua regia and collecting the volatile (68)Ge in a solution containing 1.0M NaOH and 2% Na₂SO₃. The solution is then acidified with HF before being loaded ... ...

    Abstract Cyclotron-produced (68)Ge can be separated from its Ga target material by dissolving the target in aqua regia and collecting the volatile (68)Ge in a solution containing 1.0M NaOH and 2% Na₂SO₃. The solution is then acidified with HF before being loaded onto a column containing AG MP-1 anion exchange resin. The column is rinsed with dilute HF to remove any remaining impurities, before eluting the desired product with 0.1M HCl. A radiochemically pure product is obtained.
    Language English
    Publishing date 2011-05
    Publishing country England
    Document type Journal Article
    ZDB-ID 1142596-9
    ISSN 1872-9800 ; 0883-2889 ; 0969-8043
    ISSN (online) 1872-9800
    ISSN 0883-2889 ; 0969-8043
    DOI 10.1016/j.apradiso.2011.01.028
    Database MEDical Literature Analysis and Retrieval System OnLINE

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