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Ontario Tech acknowledges the lands and people of the Mississaugas of Scugog Island First Nation.

We are thankful to be welcome on these lands in friendship. The lands we are situated on are covered by the Williams Treaties and are the traditional territory of the Mississaugas, a branch of the greater Anishinaabeg Nation, including Algonquin, Ojibway, Odawa and Pottawatomi. These lands remain home to many Indigenous nations and peoples.

We acknowledge this land out of respect for the Indigenous nations who have cared for Turtle Island, also called North America, from before the arrival of settler peoples until this day. Most importantly, we acknowledge that the history of these lands has been tainted by poor treatment and a lack of friendship with the First Nations who call them home.

This history is something we are all affected by because we are all treaty people in Canada. We all have a shared history to reflect on, and each of us is affected by this history in different ways. Our past defines our present, but if we move forward as friends and allies, then it does not have to define our future.

Learn more about Indigenous Education and Cultural Services

Rachid Machrafi


Department of Energy and Nuclear Engineering

Faculty of Engineering and Applied Science

Contact information

Energy Systems and Nuclear Science Research Centre (ERC) - Room 4064
North Oshawa
2000 Simcoe Street North
Oshawa, ON L1G 0C5

905.721.8668 ext. 5522

Office hours:
Monday - 10:00 AM - 11:00 AM Wednesday - 10:00 AM - 11:00 AM


  • PhD in Nuclear Physics Joint Institute for Nuclear Research, Dubna, Russia
  • MASc in Nuclear Physics Voronezh State University, Russia
  • BSc in Physics King M.V. University, Morocco

Courses taught

  • Radiation and Nuclear Technologies
  • Radiation Protection
  • Industrial Applications of Radiation Techniques
  • Advanced Radiation Science
  • Transmutation of Nuclear Waste

Research and expertise

  • Applied Radiation Science
  • Radiation Detection for Nuclear Security and non Proliferation
  • ADS systems for Energy Production and Nuclear Waste transmutation
  • Monte Carlo Simulation and Modeling
  • Space Radiation (Radiation Environment aboard Space Crafts)
  • Educational Technology


  • Selected publications
    • V. Kovalchuk. R. Machrafi, Neutron Fields around an Intense DT Neutron Generator, Nuclear Engineering and Design, 2013 (under revision)
    • M.B. Smith, et al., Measurements of the neutron dose and energy spectrum on the international space station during expeditions ISS-16 to iss-21, Radiation Protection Dosimetry (2012), pp. 1–25, 201
    • Brent Lewis et al., Review of Bubble Detector Response Characteristics and Results from Space, Radiation Protection Dosimetry (2011), pp. 1–21, doi:10.1093/rpd/ncr358
    • R. Machrafi, K. Garrow, H. Ing et al., Study of the Neutron Dose with Bubble Detectors Aboard the International Space Station, Radiation Protection Dosimetry, March (2009), 133/4, pp.1-8
    • H. Ing, H. R. Andrews , R. Machrafi, A. Voevodskiy , V. Kovaltchouk ,E. T. H. Clifford , M. Robins , C. Larsson , R. Hugron ,and J. Brown , A New Electronic Neutron Dosimeter (END) For Reliable Personal Dosimetry, SPIE, Volume 6954,695419 (2008); DOI:10.1117/12.782489
    • H. Ing, S. Djeffal, T. Clifford, L. Li, R. Noulty and R. Machrafi, Modification of Rospec to Cover Neutron from Thermal to 18 MeV, Radiation Protection Dosimetry, May (2007), pp.1-5
    • H. Ing, S. Djeffal, T. Clifford, R. Machrafi and R. Noulty , Portable Spectroscopic Neutron Probe, Radiation Protection Dosimetry, June (2007) , pp.1-6
    • G. N. Kim, Y. S. Lee, Machrafi R., H. Ahmed, D. Son, V. Skoy, H. S. Kang, I.S. Ko, M. H. Cho, W. Namkung, J. H. Jhang, and K. J. Yoo, Measurement of Neutron Total Cross Section of Ag and Sm at Pohang Accelerator Laboratory, J.Nuclear Science and Technology Supplement 4 (3), 388-392 (2004)
    • G. Kim, R. Machrafi et al., Measurement of neutron total cross-section of Dy at Pohang Neutron Facility, Annals of Nuclear Energy, Volume30, issue 11, July, pp. 1123-1134, (2003)
    • Kim D.G, Machrafi R. et al., Measurement of the total cross section at Pohang Neutron facilities, Journal of the Korean Physics Society, Volume 41, Number 3 September (2002), pp. 314-321
    • P. Szalanski, M. Stepinski, Yu. M. Gledenov, P.V. Sedyshev, R. Machrafi, D. Aranghel, Nucleo-synthesis of the Elements in Cl-S Region, During Helium and Carbon Burning in a 25 M Stars, Romanian Journal of Physics, (2002)
    • Yu.M. Gledenov, Machrafi R. et al., Testing an Ionization Chamber and Measurement of NP and NA reactions cross-section. Nuclear Instruments and Methods in Physics Research, A 431 (1999) 201-207
    • Yu. M. Gledenov, Machrafi R. et al., Search of P-odd and P-even correlations in NP Reactions, Nuclear Physics A 654 (1999) 943c-948c
  • Industrial service
    • Consultant of Radiation Services Department, Bubble Technology Industries
    • Consultant with Canadian Space Agency
  • Awards and affiliations
    • Faculty of Energy Systems & Nuclear Science Best Instructor, 2013, Ontario Tech Engineering Society
    • ASME best paper, 20th Conference on Nuclear Engineering Power, Jul.30-Aug-3, 2012, USA, California
    • ASME Certificate of Appreciation, as organizer of Education, Human resource and Public Acceptance Track, 2012
    • Award of the Joint Institute of Nuclear Research, FLNP, Dubna, Russia, 2000
    • Award of the International Conference of Young Scientists, Russia, 2001
    • Member of the CNS, HPS and EPS