Teaching Associate Professor
January 2014 – Present
Department of Physics, East Carolina University
Students that enroll in my courses learn a variety of useful skill sets, including
Webmaster
November 2015 – Present
Ancient TL is a peer-reviewed scientific journal that details experimental and theoretical aspects of luminescence dating, electron spin resonance (ESR) dating, and related techniques.
Handcrafted.codes — Physics, numerical programming, data science, and more
Ph.D. in Physics, Oklahoma State University (July 2011)
Dissertation: Radiation Shielding for Future Space Exploration Missions
Developed a method for quantifying the efficacy of a candidate space radiation shielding material using a combination of experimental and numerical techniques.
M.S. in Physics, Oklahoma State University (May 2006)
Thesis: The Characterization of Surface Diffusion by Digital Particle Tracking
Quantified the aqueous surface diffusion of polystyrene microspheres as a step toward developing an artificial lung surfactant specific to infant respiratory distress syndrome.
B.S. in Physics; Minor: Mathematics, Oklahoma State University (December 2000)
Physics Instructor
August 2012 – December 2015
I taught physics here for a few years before transitioning to ECU.
Research Fellow
May 2012 – April 2013
Office of Technology Transfer, East Carolina University
Research Scientist
May 2006 – July 2011
Eril Research, Inc.
Graduate Technical Laboratory Assistant
August 2005 – May 2006
Department of Physics, Oklahoma State University
Research Assistant
May 2003 – May 2006
Department of Physics, Oklahoma State University
Teaching Assistant
August 2001 – August 2005
Department of Physics, Oklahoma State University
Research Assistant
August 1999 – August 2000
Department of Physics, Oklahoma State University
System Administrator / Research Assistant
August 1997 – August 1999
Department of Physics, Oklahoma State University
J.M. DeWitt and E.R. Benton, "Novel composite materials for space radiation protection," in preparation.
J.M. DeWitt and E.R. Benton, "Secondary proton buildup in space radiation shielding," Life Sciences in Space Research 41, 119-126 (2024).
J.M. DeWitt, S. McMahon, and J. Parnell, "The Effect of Grain Size on Porewater Radiolysis," Earth and Space Science 9(6), e2021EA002024 (2022).
J.M. DeWitt and E.R. Benton, "Shielding effectiveness: A weighted figure of merit for space radiation shielding," Applied Radiation and Isotopes 161, 109141 (2020).
E.R. Benton, C.E. Johnson, J.M. DeWitt, N. Yasuda, E.V. Benton, M.H. Moyers, and A.L. Frank, "Observations of short-range, high-LET recoil tracks in CR-39 plastic nuclear track detector by visible light microscopy," Radiation Measurements 46, 527-532 (2011).
C.E. Johnson, J.M. DeWitt, E.R. Benton, N. Yasuda, and E.V. Benton, "LET Spectrum Measurements in CR-39 PNTD with AFM," Proceedings of the 21st International Conference on the Application of Accelerators in Research and Industry (CAARI 2010), Fort Worth, Texas, USA, 8-13 August 2010, F.D. McDaniel and B.L. Doyle, AIP Conference Proceedings 1336, 637 (2011).
J.M. DeWitt, E.R. Benton, Y. Uchihori, N. Yasuda, E.V. Benton, and A.L. Frank, "Assessment of radiation shielding materials for protection of space crews using CR-39 plastic nuclear track detector," Radiation Measurements 44, 905-908 (2009).