Biological effectiveness of photons and electrons as a function of energy

*Division of Cancer Epidemiology and Genetics, National Canc Institute, Bethesda, MD 20892‐7238; †Texas AM ‡S International, Menlo Park, CA 94025‐3493; §Medical Research Cou cil, Harwell OX11 0RD, United Kingdom; **Center for Risk a Economic Analysis of Terrorism Events, University of Southe California, Los Angeles, CA 90089‐2902; ††Oak Ridge Center f Risk Analysis, Oak Ridge, TN 37830‐7739; ‡‡U.S. Environmen Protection Agency, Washington, DC 20460‐0001; §§Department Epidemiology, School of Public Health, University of North Carolin Chapel Hill, NC 27599‐7435; ***Clarksburg, MD 20871-436 †††Department of Biological Sciences, Wayne State Universi Detroit, MI 48202‐3917; ‡‡‡Department of Radiology, Medici School, Complutense University, Madrid, Spain. The authors declare no conflicts of interest. For correspondence contact: Steven L. Simon, Division of Canc Epidemiology and Genetics, National Cancer Institute, Bethesda, M 20892‐7238, or email at ssimon@mail.nih.gov. (Manuscript accepted 22 October 2012) 0017-9078/15/0 Copyright © 2014 Health Physics Society