Roentgen (unit) Roentgen (unit) The roentgen or röntgen () (symbol R) is a legacy unit of measurement for the exposure of X-rays and gamma rays. It is defined as the electric charge freed by such radiation in a specified volume of air divided by the mass of that air. In 1928 it was the first international measurement quantity for ionising radiation to be defined for radiation protection, and was an easily replicated method of measuring air ionization directly by using an ion chamber. It is named after the German physicist Wilhelm Röntgen, who discovered X-rays. Although relatively easy to measure, it had
Kevin Roentgen Philm. In November 2012 and May 2013, Goldsboro toured the UK garnering them favorable reviews in UK publications Mojo Magazine, Classic Rock Magazine, Metal Hammer and Kerrang!, as well as airplay on XFM London and Radio 2. In 2017, Roentgen began playing guitar with L.A.-based rock band Buckcherry. Roentgen has also written and produced original music compositions for Fox TV promos including "New Girl, Ben and Kate, Enlisted, The Following, ADHD, Glee, Hell's Kitchen, Allen Gregory, American Idol, Lone Star, Chicago Code, Fringe, Bones, Cops, Empire, The Exorcist, Rosewood, Gotham, Ghosted and The Orville." Kevin Roentgen Kevin Roentgen (pronounced rent-gehn)