Government Funding Lapse
Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.

The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.

Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

Principles of Radiation Physics and Dosimetry

Dr. Matthew Mille presents an overview of radiation physics and dosimetry. Lecture covers: difference between ionizing and non-ionizing radiation; basic concepts of the nucleus and nuclear particles involved in radioactive decay; difference between radioactivity and radiation; processes that result in emission of radiation; how radiation interacts with tissue (because these lead to “dose”); definition of dose quantities and units; sources of radiation exposure in everyday life.

Download Dr. Mille's slides in pdf format (6.7 MB).

View more presentations from the Radiation Epidemiology and Dosimetry Course.