Health Physics and Radiation Protection

Health Physics Faculty

Timothy J. Jorgensen, PhD, MPH; Associate Professor


  • Georgetown University; 3970 Reservoir Road NW; TRB, E220; Washington, DC 20057
  • tel: 202-687-1810
  • email:

Dr. Jorgensen is a radiation biologist, cancer epidemiologist, and public health professional. He has formal training in radiation health sciences and radiation biology (Ph.D., Johns Hopkins); cancer molecular biology (postdoctoral fellowship; Dana-Farber Cancer Institute and Harvard Medical School); risk assessment (graduate certificate; Center for Risk Science and Public Policy, Johns Hopkins); and epidemiology (MPH, Johns Hopkins). He is board certified in Public Health (CPH), and a Member of Council on the National Council for Radiation Protection. He is Chairman of the Radiation Safety Committee at Georgetown University. He teach graduate courses in radiation biology, radiation protection, and radiation risk assessment in the Health Physics Program, and he trains radiation oncology residents at Georgetown University Hospital. In addition to his regular appointment in the Department of Radiation Medicine at Georgetown, he also holds an adjunct faculty appointment in the Department of Epidemiology at the Bloomberg School of Public Health at Johns Hopkins. Dr. Jorgensen's research interests include the genetic factors that determine cellular radioresistance, and genetic variants that may modify the risk of radiation-induced cancer.

Gary Phillips, PhD, Adjunct Professor

  • Georgetown University; 3970 Reservoir Road NW; Building D; Washington, DC 20057
  • tel: 202-687-6337
  • email:

Dr. Gary Phillips is currently Adjunct Professor in the Radiation Medicine department, performing research in nuclear radiation detection and neutron spectrometry and teaching in the graduate Health Physics program. His research involves the development of optical radiation detectors for nuclear non-proliferation applications. Dr. Phillips received his Ph.D. in Nuclear Physics from the University of Maryland, College Park followed by postdoctoral appointments at the University of Washington, Seattle and the University of Texas at Austin. Prior to coming to Georgetown University he was head of the Radiation Detection section at the US Naval Research Laboratory, Washington, DC. At NRL he led a project to develop radiation analysis software for Navy sensors, managed a multilaboratory program to develop a ruggedized, fieldable array of high-resolution gamma-ray detectors, developed innovative gamma-ray imaging techniques and flew experiments to study radionuclide concentrations in orbit. While at NRL he led a Navy team in a congressionally mandated program to investigate nuclear and chemical pollution in Siberia and in the Arctic seas and conducted an environmental remediation study at mixed nuclear and chemical waste sites in US DOD facilities.

James Finucane, PhD, Adjunct Associate Professor

  • Georgetown University; 3970 Reservoir Road NW; Washington, DC 20057
  • tel: 301-365-3485
  • email:

Dr. Finucane obtained his undergraduate degree in Engineering Science in 1961 from Stanford University. He completed his graduate education at Berkeley where he earned his M.Sc. and Ph.D. degrees in 1966 and 1969 respectively -- both in Nuclear Engineering. He spent most of his career as a scientist working for the U.S. department of Energy and for the International Atomic Energy Agency (IAEA). He represented the United States at various technical international forums, and managed a variety of programs to improve the safety of nuclear power and handle spent nuclear fuel. He is the Course Director of two graduate courses including: Introduction to Nuclear Nonproliferation and Indicators of Nuclear Proliferation. Both courses include topics ranging from the fundamentals of radiation physics to the defense against nuclear or radiological terrorism.

David A. Schauer, ScD, Adjunct Associate Professor

  • Georgetown University; 3970 Reservoir Road NW; Building D; Washington, DC 20057
  • tel: 301-379-3388
  • email:

Dr. David A. Schauer is Executive Director Emeritus of the National Council on Radiation Protection and Measurements and a subject matter expert with Science Applications International Corporation. He is also an Adjunct Associate Professor at the University of Nevada Las Vegas. Since 2005, Dr. Schauer has served as a Program Evaluator for the Accreditation Board on Engineering and Technology. He received his graduate degrees from Georgetown (MS) and Johns Hopkins University (ScD) and is a board certified health physicist (CHP). From 1984 to 2004, Dr. Schauer served as a naval officer and during this time he held numerous technical and leadership positions including Science Advisor of the Naval Dosimetry Center in Bethesda, MD. He has authored or co-authored over 50 journal articles, book chapters, proceedings and technical reports. Dr. Schauer serves on the Editorial Boards of Radiation Protection Dosimetry and Radiation Measurements and has given over 25 invited and keynote lectures. His primary research interests are personnel dosimetry, biodosimetry and radiation effects.

David S. Jonas, JD, LLM, MA, Adjunct Professor

  • Georgetown University Law Center; 600 New Jersey Ave NW, Washington, DC 20001
  • tel: 202-694-7014
  • email:

David S. Jonas is the General Counsel of the Defense Nuclear Facilities Safety Board. In that capacity he is the chief legal and policy advisor to a Board of five Presidentially appointed, Senate-confirmed officials tasked with oversight of the Department of Energy (DOE) nuclear weapons complex. He joined the Board on October 7, 2012. Prior to that, he served as Director of Legal Strategy and Analysis in the Office of the General Counsel at DOE. He was appointed to the Senior Executive Service as General Counsel of the National Nuclear Security Administration (NNSA) on April 17, 2005. NNSA is a separately organized agency within DOE. He began his service with NNSA as the Deputy General Counsel in 2001 and served as Acting General Counsel from 2003-2005. Mr. Jonas is an adjunct professor at the Georgetown University Law Center where he teaches nuclear non-proliferation law and policy, and he is a frequent speaker on this topic. Mr. Jonas attended Denison University in Granville, OH where he graduated with a B.A. in Political Science. He received his J.D. from the Wake Forest University School of Law in Winston-Salem, NC; an LL.M. in military law from the Judge Advocate General's School, U.S. Army, in Charlottesville, VA and an LL.M. in International and Comparative Law from Georgetown University Law Center, With Distinction. He received an M.A. in National Security and Strategic Studies from the U.S. Naval War College With Highest Distinction.

Keir Lieber, PhD, Associate Professor

  • Georgetown University School of Foreign Service, and Department of Government; Mortara Builidng, room 212; Washington, DC 20001
  • tel: 202-687-5583
  • email:

Keir Lieber is Associate Professor in the Edmund A. Walsh School of Foreign Service and the Department of Government at Georgetown University. He earned his M.A. and Ph.D. in Political Science from the University of Chicago, and graduated Phi Beta Kappa with a B.A. from the University of Wisconsin-Madison. He previously taught at the University of Notre Dame. Prof. Lieber's areas of expertise include nuclear weapons, strategy, and deterrence; the causes of war; U.S. foreign policy; and international relations theory. He is author of War and the Engineers: The Primacy of Politics over Technology (Cornell University Press, 2005, 2008) and editor of War, Peace, and International Political Realism (University of Notre Dame Press, 2009). His articles have appeared in the leading scholarly and foreign policy publications, including International Security, Security Studies, Foreign Affairs, and the Atlantic Monthly. He has been awarded fellowships from the Brookings Institution, Council on Foreign Relations, Earhart Foundation, and Smith Richardson Foundation. Prof. Lieber is currently writing a book (with Daryl Press, of Dartmouth College) on nuclear weapons and international politics.

Allen Brodsky, Sc.D., CHP, CIH, Dipl. ABR; Adjunct Professor

  • Georgetown University; 3970 Reservoir Road NW; Washington, DC 20057
  • tel: 410-641-6523
  • email:

Dr. Brodsly’s education includes: B.E. in chemical engineering, Johns Hopkins, 1949, M.A. in physics, Johns Hopkins, 1960, Sc.D. in biostatistics and radiation health, Graduate School of Public Health (GSPH), University of Pittsburgh, 1966, Atomic Energy Radiological Physics Fellow, Oak Ridge National Laboratory, 1949-50. Certified by American Boards of Health Physics (CHP), 1960, Industrial Hygiene (CIH), 1966; Radiology, 1975. His experience includes: establishing radiation safety programs at the Naval Research Laboratory (1950-52) and at several universities and hospitals; writing regulations and regulatory guides for two Federal agencies; developing radiation treatments for cancer patients; conducting diagnostic gamma and neutron measurements at the first three hydrogen bomb tests; training responders in A-bomb fallout fields at Nevada nuclear tests; establishing an in vivo body counter and bioassay laboratory as Technical Director of Radiation Medicine at Presbyterian-University Hospital, Pittsburgh, and using these facilities to evaluate patients' accidental external and internal radiation doses; developing mathematical algorithms to estimate external and internal doses to "atomic veterans." He has taught radiation dosimetry, health physics, biostatistics, and epidemiology to more than 150 graduate students, and served as advisor on masters' theses and doctoral dissertations for several dozen students. His awards include: the Fellow and Founders awards and the Robley Evans Medal of the Health Physics Society; the Failla Lectureship and Award of the New York Chapters of HPS and AAPM; the Radiation Science and Technology Award of the American Nuclear Society; the Distinguished Graduate Award of GSPH, University of Pittsburgh; and the Vicennial Medal of Georgetown University.

Mira O. Jung, PhD, Professor

  • Georgetown University; 3970 Reservoir Road NW; TRB, E211; Washington, DC 20057
  • tel: 202-687-8352
  • email:

Mira Jung, Ph.D. received her basic training in molecular biology and microbiology at the University of Kansas, and postdoctoral training in radiation biology and molecular biology at Georgetown University. She is currently Professor and Director of Molecular Radiation Laboratory and Microarray Core-Facility in Radiation Medicine and Microbiology at Georgetown University Medical Center. The research focuses on molecular mechanisms underlying radiation sensitivity. Identification of factors associated with the responses of mammalian cells to ionizing radiation has been a major area of her research. The research contributions include the findings that NF-kB activation is a critical mechanism for cell survival of cells from patients with the human radiation sensitivity syndrome of ataxia-telangiectasia and the mutated AT gene product, ATM, is involved in this process. Recently, her research has made an important breakthrough in signal transduction studies that implicate the chromatin structure modification in the mechanism in radiation sensitivity. Thus, the overall research goals are to determine mechanisms of radiation responses of tumor cell lines, identify targets for therapeutic gain, and develop strategies for using this knowledge for future development of translational research projects.

Vicente Notario, PhD, Professor

  • Georgetown University; 3970 Reservoir Road NW; TRB, E215; Washington, DC 20057
  • tel: 202-687-2226
  • email:

Dr. Vicente Notario is Professor of Radiation Medicine and Biochemistry and Molecular & Cellular Biology. He is also Director of the Division of Radiation Research in the Department of Radiation Medicine, and Leader of the Radiation Biology Program of the V.T. Lombardi Comprehensive Cancer Center. Dr. Notario's research focuses on the study of molecular mechanisms of development of malignant tumors, and involves the investigation of the effects of environmental carcinogens, such as chemical pollutants and radiation, on mammalian cells with regard to the expression and activity of cancer genes and their protein products. Currently, there are three main research areas in Dr. Notario's laboratory: 1) characterization of the molecular mechanism of action of a novel oncogene, termed PCPH, originally isolated in Dr. Notario’s laboratory, and functional studies on its role in the development of prostate cancer; 2) preclinical studies of molecular targeting approaches to block the activity of the EWS/FLI-1 oncogene present in tumors of the Ewing’s sarcoma family, and 3) mechanistic analyses of the involvement of the Dlk1 protein in determining the invasiveness and metastatic program of human lung tumors cells of the small cell lung carcinoma (SCLC) type. Additional ongoing pilot experiments involve studies on the anti-cancer actions of human dietary components.