Roentgen (unit) this derivative quantity the roentgen equivalent physical (rep) to distinguish it from the ICR roentgen. The introduction of the roentgen measurement unit, which relied upon measuring the ionisation of air, replaced earlier less accurate practices that relied on timed exposure, film exposure, or fluorescence. This led the way to setting exposure limits,and the National Council on Radiation Protection and Measurements of the United States established the first formal dose limit in 1931 as 0.1 roentgen per day. The International X-ray and Radium Protection Committee, now known as the International Commission on Radiological Protection (ICRP) soon followed with a limit of
Kevin Roentgen Kevin Roentgen Kevin Roentgen (pronounced rent-gehn) is a singer/songwriter/producer and formerly guitarist for UK Platinum, Brit Award-winning American rock band Orson, who is currently based in Nashville, TN. Roentgen is previously known for fronting L.A. rock bands American Pearl (Wind-Up Records), SOUL (Elektra Records) and Goldsboro. Following the break-up of American Pearl, Roentgen spent most of 2003 in the studio writing and demo-ing new songs. The result was Praying Hands, "The Acoustic EP", recorded and co-produced by Noah Shain at White Buffalo Studio in Hollywood. In 2005, Roentgen joined L.A. band Orson as a guitarist. In 2006, Orson released their