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Prof. Nadir Omar Hashim

Professor, Department of Physics

Home School of Pure & Applied Sciences Department of Physics Prof. Nadir Omar Hashim

Prof. Nadir Omar Hashim

Professor, Department of Physics

Administrative Position
Chairman, Department of Physics: 18 July 2015– to – 17 July 2019; Acting Dean, School of Pure and Applied Sciences, 09 – 22 April 2018, 14-15 March 2018; Acting Chairman, Department of Physics: 28 May – 18 July, 2015; 11-13 March 2015, 18-20 February 2015, 23 rd June – 1 st July 2011.; Acting Director, Directorate of E-Learning, 17-24 December 2014; July 2016. Appointed Member, Senate Committee on Examination Irregularity

Academic Qualifications

Sophy Njoki; Nadir Omar Hashim; Margaret Chege. "Evaluation of Heavy Metal Concentration in Sediments of Rupingazi River, Kenya.” Volume. 9 Issue.9, September - 2024 International Journal of Innovative Science and Research Technology (IJISRT), www.ijisrt.com. ISSN - 2456-2165, PP:- 647-653, https://doi.org/10.38124/ijisrt/IJISRT24SEP002
Delphine K. Nzivulu, Nadir O. Hashim, Nicholas Musila, Kapis E. Otieno, Felix O. Wanjala (2024). Investigation of red clay and waste glass composite bricks for ionizing radiation shielding. Volume 12, June 2024, 102744. https://doi.org/10.1016/j.mex.2024.102744
Veronicah N. Kihagi, Samuel M. Chege, Nadir O. Hashim, Naftali K. Kimani, Claus Grupen, Lateral distribution cosmic ray muon coincidences up to 36 m. MethodsX, Volume 12, 2024, 102715, ISSN 2215-0161, https://doi.org/10.1016/j.mex.2024.102715
Kenneth A Oborah, Nadir O Hashim, Charles M Migwi, Charles Rotich (2024). Assessment of radioactivity concentration for building materials used in Babadogo Estate, Nairobi City County, Kenya. Radiation Protection Dosimetry, Volume 200, Issue 2, February 2024, Pages 201–205, https://doi.org/10.1093/rpd/ncad293
E.N. Munene, N.O. Hashim, W.N. Ambusso (2023). Human health risk assessment of heavy metal concentration in surface water of Sosian river, Eldoret town, Uasin-Gishu County Kenya, MethodsX, Volume 11, 102298, ISSN 2215-0161. https://doi.org/10.1016/j.mex.2023.102298 .
Willis Otieno Gor Odongo, Margaret Chege, Nadir Hashim, Shinji Tokonami, Kranrod Chutima, Charles Rotich, "Determination of Activity Concentration of Natural Radionuclides and Radiation Hazards’ Assessment of Building Materials in High Background Radiation Areas of Homa and Ruri, Kenya", The Scientific World Journal, vol. 2021, Article ID 9978619, 7 pages, 2021. https://doi.org/10.1155/2021/9978619
Willis Otieno Gor Odongo, Nadir Hashim, Margaret Wairimu Chege, "Gamma Ray Spectrometric Analysis of Sand Samples from Selected Beaches along Kenyan Coastline", The Scientific World Journal, vol. 2021, Article ID 6621645, 8 pages, 2021. https://doi.org/10.1155/2021/6621645
C K Rotich, N O Hashim, M W Chege, C Nyambura, Naturally Occurring Radionuclides in Soil Samples of Bureti Sub-County of Kericho County Kenya, Radiation Protection Dosimetry, 2021, ncab006, https://doi.org/10.1093/rpd/ncab006
Wanjala, O. F., Otwoma, D., Chege, M., Hashim, O. N., Nyambura, C., Kebwaro, J., & Atieno, C. (2021). Lung Cancer Risk Assessment due to Radon and Thoron Exposure in Dwellings in Ortum, Kenya. Journal of Environment Pollution and Human Health (Online), 9(2), 64-70. http://pubs.sciepub.com/jephh/9/2/5/
C.K. Rotich, N.O. Hashim, M.W. Chege, C. Nyambura. Measurement of Radon Activity Concentration in Underground Water of Bureti Subcounty of Kericho County Kenya. Radiation Protection Dosimetry, Volume 192, Issue 1, October 2020, Pages 56–60, https://doi.org/10.1093/rpd/ncaa193
11. F.W. Omonya, N.O. Hashim, D. Otwoma, C. Nyambura, J. Kebwaro, M. Ndege, S. Bartilol (2020). Environmental Assessment of heavy metal pollutants in soils and water from Ortum, Kenya. Environmental Monitoring and Assessment. Vol. 192. Issue 2. Springer International Publishing. https://pubmed.ncbi.nlm.nih.gov/31950287/
12. C. Nyambura , N. O. Hashim , M. W. Chege , S. Tokonami and F. W. Omonya (2020) Cancer and non-cancer health risks from carcinogenic heavy metal exposures in underground water from Kilimambogo, Kenya. Groundwater for Sustainable Development . Elsevier. https://doi.org/10.1016/j.gsd.2019.100315
F O Wanjala, N O Hashim, D Otwoma, C Nyambura, J Kebwaro, A Mauring, J Bartilol, M Chege, (2019). Human Exposure to Background Radiation in Ortum, Kenya. Radiation Protection Dosimetry , ncz264, https://doi.org/10.1093/rpd/ncz264
M. W. Chege, N. Hashim, C. Nyambura, A. Mustapha, M. Hosada, S.Tokonami (2019). Radon and Thoron; Radioactive Gases Lurking in Earthen Houses in Rural Kenya. Front. Public Health , 08 May . https://doi.org/10.3389/fpubh.2019.00113
C. Nyambura, S. Tokonami, N.O. Hashim, M.W. Chege, T. Suzuki, H. Kudo, M. Hosoda. Annual effective dose assessment due to radon and thoron progenies in dwellings of Kilimambogo, Kenya. Radiation Protection Dosimetry . 29th April 2019. https://doi.org/10.1093/rpd/ncz090
M. W. Chege, N. O. Hashim, A. S. Merenga, O. Meisenberg, J. Tschiersch. Estimation of Annual Effective Dose Due to Radon and Thoron Concentrations in Mud Dwellings of Mrima Hill, Kenya. Radiation Protection Dosimetry (2015) 1-4; https://doi.org/10.1093/rpd/ncv231
M. W. Chege; N. O. Hashim; A. S. Merenga; J. Tschiersch. Analysis of Internal Exposure Associated with Consumption of Crops and Groundwater from the High Background Radiation Area of Mrima Hill, Kenya. Radiation Protection Dosimetry (2015) 1-3; http://doi.org/10.1093/rpd/ncv261
Wanjala, F.O., Otwoma, D., Kitao, T.F., & Hashim, N.O. (2015). Assessment of Natural Radioactivity and its Radiological Impact in Ortum Region in Kenya. Radiation Safety for Sustainable Development, (p. 176). Kenya (INIS)
M. Schmelling, N.O. Hashim, C. Grupen, S. Luitz, F. Maciuc, A. Mailov, A.-S. Mueller,
H.-G. Sander, S. Schmeling, R. Tcaciuc, H. Wachsmuth, T. Ziegler, K. Zuber (The CosmoALEPH Collaboration). Spectrum and Charge Ratio of Vertical Cosmic Ray Muons up to Momenta of 2.5 TeV/c. Astroparticle Physics . 49 (2013) 1 – 5.
Chege, M. W., Hashim, N. O., Merenga, A. S. and Tschiersch, J. Lead contamination of traditional hand-dug wells in parts of Kwale County, Kenya. International Journal of Physical Sciences , 8(17), 835-839 (2013).
Chege, M. W., Hashim, N. O. and Merenga, A. S. Physico-chemical analysis of groundwater in the Gazi-Mrima Hill region of Kwale County, Kenya. Asian Journal of Science and Technology , 4(5), 055-058 (2013)
M. Schmelling, N.O. Hashim, C. Grupen, S. Luitz, F. Maciuc, A. Mailov, A.-S. Mueller, H.-G. Sander, S. Schmeling, R. Tcaciuc, H. Wachsmuth, and K. Zuber (The CosmoALEPH Collaboration). Spectrum and Charge Ratio of Vertical Cosmic Ray Muons up to Momenta of 2.5 TeV/c. arXiV:1110.4325v1 [hep-ex] 19 Oct 2011.
J.M. Kebwaro, I.V.S. Rathore, N.O. Hashim and A.O. Mustapha. Radiometric assessment of natural radioactivity levels around Mrima hill, Kenya. International Journal of the Physical Sciences, 6(13), 3105-3110. (2011)
J.M. Kebwaro, N.O. Hashim and A.O. Mustapha. Construction of a generic reference material for gamma ray spectrometric analysis. Indonesian Journal of Physics . 22(4), 105-106. (2011)
C. Grupen, N.O. Hashim, B. Jost, F. Maciuc, S. Luitz, A. Mailov, A.-S. Mueller, A.Putzer,H.-G. Sander, S. Schmeling, M. Schmelling, R. Tcaciuc, H. Wachsmuth, Th. Ziegler, K. Zuber. Cosmic ray results from the CosmoALEPH experiment. Nuclear Physics B 175 - 176 (2008) 286 – 293.
S. Plewnia, Th. Berghoefer, J. Bluemer, P. Buchholz, J. Engler, N.O. Hashim, J.R. Hoerandel, R. Lixandru, J. Milke, W. Walkowiak, J. Wochele. A sampling calorimeter with warm-liquid ionization chambers. Nuclear Instruments and Methods. A556 (2006) 422 – 432
F. Maciuc, C. Grupen, A. Mailov, S. Luitz, A.-S. Mueller, N. O. Hashim, A. Putzer, B. Rensch, H. G. Sander, S. Schmeling, M. Schmelling, R. Tcaciuc, H. Wachsmuth, Th. Ziegler, K. Zuber. Muon-Pair Production by Atmospheric Muons in CosmoALEPH. Physical Review Letters, 96 021801 (2006)
N.O. Hashim, I.V.S. Rathore, A.M. Kinyua, R.L. Stangl, A.O. Mustapha. Assessment of quality of trace element measurements by EDXRF technique: a statistical approach. Radiation Physics and Chemistry , Vol. 71 (2004), Nr. 3-4, p 791-792
N.O. Hashim, I.V.S. Rathore, A.M. Kinyua, A.O. Mustapha. Natural and artificial radioactivity levels in sediments along the Kenyan coast. Radiation Physics and Chemistry , Vol. 71 (2004), Nr. 3-4, p 805-806
A.O. Mustapha, J.P. Patel, I.V. S. Rathore, N.O. Hashim, D. Otwoma. An investigation of the repeatability of calibration factors in gamma-ray spectrometry of geological materials. Applied Radiation and Isotopes , Vol. 60 (2004), Nr. 1, p 79-82
N. O. Hashim, A.M. Kinyua, M.J. Mangala, I.V.S. Rathore. EDXRF analysis of lead and other toxic trace elements in soil samples along two major highways of Kenya. Radiation Physics Chemistry Vol. 51 (1998), Nr. 4-6, p 629-630
N. O. Hashim, A.M. Kinyua, M.J. Mangala, I.V.S. Rathore. Analysis of soil for trace elements along two major highways of Kenya. East African Journal of Science, 1(1), 2-10 (1998).

Books

Nuclear Educational Networks: Experience Gained and Lessons Learned. IAEA-TECDOC-2007. Published in 2022: IAEAL 22-01527 | ISBN 978–92–0–135522–5. I contributed experiences from Africa.
N.O. Hashim. Measurement of the momentum spectrum of cosmic ray muons at a depth of 320 mwe. Shaker Verlag. Aachen, Germany, 2007. ISBN 978-3-8322-6445-1

Conference Papers

  1. International Symposium on Smog and Air Quality: Chemical Insights, Remediation, and Sustainable Mitigation. Department of Chemistry, UET-Lahore, Pakistan. 17th January 2025. I presented online on the following topic: Applications of Nuclear Techniques in Air Monitoring.
  2. Ministerial Conference on Nuclear Science and Technology and Meeting of NLOs and Educational Networks, held from 26 th November to 01 December 2024 at the Headquarters of the International Atomic Energy Agency (IAEA) in Vienna, Austria.
  3. International Conference on Nuclear Knowledge Management and Human Resources held from 01 to 05 July 2024 at the Headquarters of the International Atomic Energy Agency (IAEA) in Vienna, Austria.
  4. First Pan African Astro-Particle and Collider Physics Workshop, held online from 21st to 23rd March 2022, presented a paper on "Big Science for National and Regional Unity".
  5. Wilton Park Conference – Expanding peaceful uses of nuclear energy and nuclear technology in Africa, 24 th to 28 th February 2020 in Johannesburg, South Africa.
  6. Nuclear Power Plant Training Program for Kenya. Advanced Power Reactor 1400 - Familiarization and Intensive Training. 13 th to 28 th August 2019 at Kenyatta University, Nairobi, Kenya.
  7. Fundamental Physics with the Square Kilometer Array (SKA). May 2017, Mauritius.
  8. Square Kilometer Array (SKA)/ South African Radio Astronomy Observatory (SARAO) Annual Bursary Conferences – December 2019, Durban, December 2018, Port Elizabeth; December 2017, December 2016. Cape Town, South Africa.
  9. Annual DARA Meeting, March 2016. Johannesburg, South Africa.
  10. JEDI Workshop, September 2015, Cape Town, South Africa.
  11. ISWI/SCOSTEP School on Space Science, October 21 – November 1, 2014, Nairobi, Kenya.
  12. Fourth General Assembly, IAEA AFRA-NEST, 14-17 August 2023, Johanesburg, South Africa; Third General Assembly, IAEA AFRA-NEST, Sharm El Sheikh, Egytpt, 08-12 April 2018; National Coordinators Meeting, IAEA AFRA-NEST, Abuja Nigeria, 01 – 05 December 2014; First IAEA AFRA-NEST General Assembly on Networking Nuclear Education and Training. 26-30 August 2013, Arusha, Tanzania.
  13. First Kenyatta University Workshop on Mathematical Modeling. 17 Th to 21 st June 2013. Kenyatta University.
  14. East African Regional Astronomy Workshops: 29 June – 01 July 2015, Addis Ababa, Ethiopia: 30 June – 04 July 2014, Kigali, Rwanda; 20 - 23 November 2012, Mukono, Uganda; 21 - 25 February 2011, Addis Ababa, Ethiopia; November 2009, Nairobi, Kenya.
  15. Wilhelm and Else Heraeus-Seminar: New event generators for particle physics experiments 04. - 06. January 2006, Dresden, Germany.
  16. VIHKOS CORSIKA School, November 25 - November 30, 2008; May 31 - June 5 2005, Freudenstadt-Lauterbad, Germany.
  17. 18th Meeting of Nobel Laureates in Physics, June 27 - July 2nd, 2004, Lindau, Germany.
  18. Astroteilchenphysik in Deutschland - Status and Perspektiven, 16.-18. September 2003,arlsruhe, Germany.
  19. ICFA School of Instrumentation in Elementary Particle Physics, March 26th - April 6th, 2001, National Accelerator Centre, Faure, Cape Town, South Africa.
  20. Role of Education Networks in Enhancing Peaceful and Sustainable Uses of Nuclear Energy and Nuclear Technology in Africa in support of Africa’s Development Agenda. Presented at the Wilton Park Conference – Expanding peaceful uses of nuclear energy and nuclear technology in Africa, 24 th to 28 th February 2020 in Johannesburg, South Africa; ener-connect webinar, 11 June 2020.
  21. Big Science for National and Regional Unity. Presented at the Kenyatta University Biennial Research and Innovation Conference, 23 – 25 October 2019, Kenyatta University, Nairobi, Kenya.
  22. Country Status Report. African Ministerial Forum Meeting of the Square Kilometer Array. 13 – 16 October, 2019, Pretoria, South Africa; 14 – 17 October 2018, Cape Town, South Africa.
  23. Development of Astronomy and Astrophysics in Kenya. Presented at the conference on fundamental physics with the Square Kilometer Array (SKA) in May 2017, Mauritius.
  24. The Momentum Spectrum and Charge Ratio of Cosmic Ray Muons Measured at a Depth of 320 mwe . Paper presented at the second Middle East and Africa Regional IAU Meeting, MEARIM II, 10 - 15 April 2011, Cape Town, South Africa.
  25. Research status reports on the measurement of the momentum spectrum and charge ratio of cosmic ray muons using ALEPH detector. Spring Meetings of the German Physical Society (DPG), Mainz-2004, Berlin-2005, Dortmund-2006, Heidelberg-2007.
  26. Momentum spectrum of cosmic muons at a depth of 320 mwe. 29th. Paper presented at the International Cosmic Ray Conference, 03. - 10. August 2005, Pune-India.
  27. Assessment of quality of trace element measurements by EDXRF technique: a statistical approach. Paper presented at the 9th International Symposium on Radiation Physics and Workshop on Radiation Based Analytical Techniques, 17-22 August 2003, iThemba LABS (formerly National Accelerator Centre), Faure, Cape Town, South Africa.
  28. Application of nuclear techniques to environmental physics. Poster presented at National Nuclear Technology Conference. 12 Th to 15 th May 2001, iThemba LABS (formerly National Accelerator Centre), Faure, Cape Town, South Africa.
  29. Chemometric approaches to assessing the quality of measurements in EDXRF spectrometry. Paper presented at The Millennium School on Nuclear and Particle Physics, 31 st January to 03 rd February 2000, iThemba LABS (formerly National Accelerator Centre), Faure, Cape Town, South Africa.
  30. IAEA - EURACHEM Workshop on “Efficient Methodology for the Evaluation of Uncertainty in Analytical Chemistry - Implementing the ISO Guide” 14 - 15 June 1999, Helsinki, Finland.
  31. N.O. Hashim for the CosmoALEPH collaboration. The Momentum Spectrum and Charge Ratio of Cosmic Ray Muons Measured at a Depth of 320 mwe. AFRICAN SKIES / CIEUX AFRICAINS, No. 16, July 2011
  32. Angeyo H.K., Patel J.P., Mustapha A.O., Achola S.O., Ogwari P., Ntihabose L., Mangala M.J., Makokha J.W., Odumo B.O., Wepukhulu G.W., Maina D.M., Kaniu I.M., Hashim N.O., Kebwaro J.M., Masinde T.S., Otwoma D., Mayaka G.N., Agora J.O., Kinyua R. and Atando V. Status and Prospects in Research Infrastructure Development in Nuclear Analytical Spectrometry and Radiometric Instrumentation Methodologies for Environmental Radiation And Associated Radioactivity Measurements and Modelling Studies in Kenya. Proceedings of IAEA Technical Meeting on Establishing a Network of Laboratories in the Field of Nuclear Instrumentation for Environmental Monitoring and Related Applications, 27-30 Sept. 2010, Krakow, Poland.
  33. N.O. Hashim, C. Grupen, S. Luitz, A. Mailov, F. Maciuc, A.-S. Mueller, A.Putzer, H.-G. Sander, S. Schmeling, M. Schmelling, R. Tcaciuc, H. Wachsmuth, Th. Ziegler, K. Zuber. Momentum spectrum of cosmic muons at a depth of 320 mwe. Proc. 29th International Cosmic Ray Conference, Pune-India, 6, 13 - 16. (2005)
  34. Sophy Njoki; Nadir Omar Hashim; Margaret Chege. "Evaluation of Heavy Metal Concentration in Sediments of Rupingazi River, Kenya.” Volume. 9 Issue.9, September - 2024 International Journal of Innovative Science and Research Technology (IJISRT), www.ijisrt.com. ISSN - 2456-2165, PP:- 647-653, https://doi.org/10.38124/ijisrt/IJISRT24SEP002
  35. Delphine K. Nzivulu, Nadir O. Hashim, Nicholas Musila, Kapis E. Otieno, Felix O. Wanjala (2024). Investigation of red clay and waste glass composite bricks for ionizing radiation shielding. Volume 12, June 2024, 102744. https://doi.org/10.1016/j.mex.2024.102744
  36. Veronicah N. Kihagi, Samuel M. Chege, Nadir O. Hashim, Naftali K. Kimani, Claus Grupen, Lateral distribution cosmic ray muon coincidences up to 36 m. MethodsX, Volume 12, 2024, 102715, ISSN 2215-0161, https://doi.org/10.1016/j.mex.2024.102715
  37. Kenneth A Oborah, Nadir O Hashim, Charles M Migwi, Charles Rotich (2024). Assessment of radioactivity concentration for building materials used in Babadogo Estate, Nairobi City County, Kenya. Radiation Protection Dosimetry, Volume 200, Issue 2, February 2024, Pages 201–205, https://doi.org/10.1093/rpd/ncad293
  38. E.N. Munene, N.O. Hashim, W.N. Ambusso (2023). Human health risk assessment of heavy metal concentration in surface water of Sosian river, Eldoret town, Uasin-Gishu County Kenya, MethodsX, Volume 11, 102298, ISSN 2215-0161. https://doi.org/10.1016/j.mex.2023.102298 .
  39. Willis Otieno Gor Odongo, Margaret Chege, Nadir Hashim, Shinji Tokonami, Kranrod Chutima, Charles Rotich, "Determination of Activity Concentration of Natural Radionuclides and Radiation Hazards’ Assessment of Building Materials in High Background Radiation Areas of Homa and Ruri, Kenya", The Scientific World Journal, vol. 2021, Article ID 9978619, 7 pages, 2021. https://doi.org/10.1155/2021/9978619
  40. Willis Otieno Gor Odongo, Nadir Hashim, Margaret Wairimu Chege, "Gamma Ray Spectrometric Analysis of Sand Samples from Selected Beaches along Kenyan Coastline", The Scientific World Journal, vol. 2021, Article ID 6621645, 8 pages, 2021. https://doi.org/10.1155/2021/6621645
  41. C K Rotich, N O Hashim, M W Chege, C Nyambura, Naturally Occurring Radionuclides in Soil Samples of Bureti Sub-County of Kericho County Kenya, Radiation Protection Dosimetry, 2021, ncab006, https://doi.org/10.1093/rpd/ncab006
  42. Wanjala, O. F., Otwoma, D., Chege, M., Hashim, O. N., Nyambura, C., Kebwaro, J., & Atieno, C. (2021). Lung Cancer Risk Assessment due to Radon and Thoron Exposure in Dwellings in Ortum, Kenya. Journal of Environment Pollution and Human Health (Online), 9(2), 64-70. http://pubs.sciepub.com/jephh/9/2/5/
  43. C.K. Rotich, N.O. Hashim, M.W. Chege, C. Nyambura. Measurement of Radon Activity Concentration in Underground Water of Bureti Subcounty of Kericho County Kenya. Radiation Protection Dosimetry, Volume 192, Issue 1, October 2020, Pages 56–60, https://doi.org/10.1093/rpd/ncaa193
  44. 11. F.W. Omonya, N.O. Hashim, D. Otwoma, C. Nyambura, J. Kebwaro, M. Ndege, S. Bartilol (2020). Environmental Assessment of heavy metal pollutants in soils and water from Ortum, Kenya. Environmental Monitoring and Assessment. Vol. 192. Issue 2. Springer International Publishing. https://pubmed.ncbi.nlm.nih.gov/31950287/
  45. 12. C. Nyambura , N. O. Hashim , M. W. Chege , S. Tokonami and F. W. Omonya (2020) Cancer and non-cancer health risks from carcinogenic heavy metal exposures in underground water from Kilimambogo, Kenya. Groundwater for Sustainable Development . Elsevier. https://doi.org/10.1016/j.gsd.2019.100315
  46. F O Wanjala, N O Hashim, D Otwoma, C Nyambura, J Kebwaro, A Mauring, J Bartilol, M Chege, (2019). Human Exposure to Background Radiation in Ortum, Kenya. Radiation Protection Dosimetry , ncz264, https://doi.org/10.1093/rpd/ncz264
  47. M. W. Chege, N. Hashim, C. Nyambura, A. Mustapha, M. Hosada, S.Tokonami (2019). Radon and Thoron; Radioactive Gases Lurking in Earthen Houses in Rural Kenya. Front. Public Health , 08 May . https://doi.org/10.3389/fpubh.2019.00113
  48. C. Nyambura, S. Tokonami, N.O. Hashim, M.W. Chege, T. Suzuki, H. Kudo, M. Hosoda. Annual effective dose assessment due to radon and thoron progenies in dwellings of Kilimambogo, Kenya. Radiation Protection Dosimetry . 29th April 2019. https://doi.org/10.1093/rpd/ncz090
  49. M. W. Chege, N. O. Hashim, A. S. Merenga, O. Meisenberg, J. Tschiersch. Estimation of Annual Effective Dose Due to Radon and Thoron Concentrations in Mud Dwellings of Mrima Hill, Kenya. Radiation Protection Dosimetry (2015) 1-4; https://doi.org/10.1093/rpd/ncv231
  50. M. W. Chege; N. O. Hashim; A. S. Merenga; J. Tschiersch. Analysis of Internal Exposure Associated with Consumption of Crops and Groundwater from the High Background Radiation Area of Mrima Hill, Kenya. Radiation Protection Dosimetry (2015) 1-3; http://doi.org/10.1093/rpd/ncv261
  51. Wanjala, F.O., Otwoma, D., Kitao, T.F., & Hashim, N.O. (2015). Assessment of Natural Radioactivity and its Radiological Impact in Ortum Region in Kenya. Radiation Safety for Sustainable Development, (p. 176). Kenya (INIS)
  52. M. Schmelling, N.O. Hashim, C. Grupen, S. Luitz, F. Maciuc, A. Mailov, A.-S. Mueller,
  53. H.-G. Sander, S. Schmeling, R. Tcaciuc, H. Wachsmuth, T. Ziegler, K. Zuber (The CosmoALEPH Collaboration). Spectrum and Charge Ratio of Vertical Cosmic Ray Muons up to Momenta of 2.5 TeV/c. Astroparticle Physics . 49 (2013) 1 – 5.
  54. Chege, M. W., Hashim, N. O., Merenga, A. S. and Tschiersch, J. Lead contamination of traditional hand-dug wells in parts of Kwale County, Kenya. International Journal of Physical Sciences , 8(17), 835-839 (2013).
  55. Chege, M. W., Hashim, N. O. and Merenga, A. S. Physico-chemical analysis of groundwater in the Gazi-Mrima Hill region of Kwale County, Kenya. Asian Journal of Science and Technology , 4(5), 055-058 (2013)
  56. M. Schmelling, N.O. Hashim, C. Grupen, S. Luitz, F. Maciuc, A. Mailov, A.-S. Mueller, H.-G. Sander, S. Schmeling, R. Tcaciuc, H. Wachsmuth, and K. Zuber (The CosmoALEPH Collaboration). Spectrum and Charge Ratio of Vertical Cosmic Ray Muons up to Momenta of 2.5 TeV/c. arXiV:1110.4325v1 [hep-ex] 19 Oct 2011.
  57. J.M. Kebwaro, I.V.S. Rathore, N.O. Hashim and A.O. Mustapha. Radiometric assessment of natural radioactivity levels around Mrima hill, Kenya. International Journal of the Physical Sciences, 6(13), 3105-3110. (2011)
  58. J.M. Kebwaro, N.O. Hashim and A.O. Mustapha. Construction of a generic reference material for gamma ray spectrometric analysis. Indonesian Journal of Physics . 22(4), 105-106. (2011)
  59. C. Grupen, N.O. Hashim, B. Jost, F. Maciuc, S. Luitz, A. Mailov, A.-S. Mueller, A.Putzer,H.-G. Sander, S. Schmeling, M. Schmelling, R. Tcaciuc, H. Wachsmuth, Th. Ziegler, K. Zuber. Cosmic ray results from the CosmoALEPH experiment. Nuclear Physics B 175 - 176 (2008) 286 – 293.
  60. S. Plewnia, Th. Berghoefer, J. Bluemer, P. Buchholz, J. Engler, N.O. Hashim, J.R. Hoerandel, R. Lixandru, J. Milke, W. Walkowiak, J. Wochele. A sampling calorimeter with warm-liquid ionization chambers. Nuclear Instruments and Methods. A556 (2006) 422 – 432
  61. F. Maciuc, C. Grupen, A. Mailov, S. Luitz, A.-S. Mueller, N. O. Hashim, A. Putzer, B. Rensch, H. G. Sander, S. Schmeling, M. Schmelling, R. Tcaciuc, H. Wachsmuth, Th. Ziegler, K. Zuber. Muon-Pair Production by Atmospheric Muons in CosmoALEPH. Physical Review Letters, 96 021801 (2006)
  62. N.O. Hashim, I.V.S. Rathore, A.M. Kinyua, R.L. Stangl, A.O. Mustapha. Assessment of quality of trace element measurements by EDXRF technique: a statistical approach. Radiation Physics and Chemistry , Vol. 71 (2004), Nr. 3-4, p 791-792
  63. N.O. Hashim, I.V.S. Rathore, A.M. Kinyua, A.O. Mustapha. Natural and artificial radioactivity levels in sediments along the Kenyan coast. Radiation Physics and Chemistry , Vol. 71 (2004), Nr. 3-4, p 805-806
  64. A.O. Mustapha, J.P. Patel, I.V. S. Rathore, N.O. Hashim, D. Otwoma. An investigation of the repeatability of calibration factors in gamma-ray spectrometry of geological materials. Applied Radiation and Isotopes , Vol. 60 (2004), Nr. 1, p 79-82
  65. N. O. Hashim, A.M. Kinyua, M.J. Mangala, I.V.S. Rathore. EDXRF analysis of lead and other toxic trace elements in soil samples along two major highways of Kenya. Radiation Physics Chemistry Vol. 51 (1998), Nr. 4-6, p 629-630
  66. N. O. Hashim, A.M. Kinyua, M.J. Mangala, I.V.S. Rathore. Analysis of soil for trace elements along two major highways of Kenya. East African Journal of Science, 1(1), 2-10 (1998).