Röntgen equivalent physical
The Röntgen equivalent physical or rep (symbol rep) is a legacy unit of
At the time, this was thought to be the amount of energy deposited by 1 roentgen.[4] Improved measurements have since found that one roentgen of air kerma deposits 8.77 mGy in dry air, or 9.6 mGy in soft tissue, but the rep was defined as a fixed number of ergs per unit gram.[5]
A 1952 handbook from the US National Bureau of Standards affirms that "The numerical coefficient of the rep has been deliberately changed to 93, instead of the earlier 83, to agree with
rad starting in 1954 and later the gray
starting in 1977.
References
- ^ Cantrill, S.T; H.M. Parker (5 January 1945). "The Tolerance Dose". Argonne National Laboratory: US Atomic Energy Commission. Archived from the original on 30 November 2012. Retrieved 14 May 2012.
{{cite journal}}: Cite journal requires|journal=(help) - ^ Dunning, John R.; et al. (1957). A Glossary of Terms in Nuclear Science and Technology. American Society of Mechanical Engineers.
- ^ Bertram, V. A. Low-Beer (1950). The clinical use of radioactive isotopes. Thomas.
- PMID 14900367.
- ^ "APPENDIX E: Roentgens, RADs, REMs, and other Units". Princeton University Radiation Safety Guide. Princeton University. Retrieved 10 May 2012.
- ^ National Bureau of Standards (1952). Radiological Monitoring Methods and Instruments (PDF). Vol. 51. US Department of Commerce. Retrieved 16 November 2012.
- ^ Meggitt G, "Taming the Rays", pub Lulu.com 2008
- ^ US patent 3568311, Elliott J. Lawton, "INSULATING AND SPACING ELECTRICALLY CONDUCTIVE MEMBERS", published 1971-03-09, issued 1971-03-01, assigned to General Electric Company
See also
- Radiation poisoning
- Röntgen equivalent man(rem)
 | This radioactivity–related article is a stub. You can help Wikipedia by expanding it. |
 | This standards- or measurement-related article is a stub. You can help Wikipedia by expanding it. |