The Roentgen Equivalent Man or REM is an older, non-SI unit of dose equivalent. Depending on the effect under study, REM can also be referred to as roentgen equivalent mammal. Measuring the quantity of radiation damage on human tissue by x-rays, gamma or any other type of ionizing radiation such as alpha and beta radiation. However, REM does not measure the amount of energy absorbed or the amount of ionization accumulated. REM was first proposed in 1945 before Sievert was an established SI unit. One hundred rem can be defined as one Sievert or 1 rem = 1 cSv = 10-2 Sv.
The following table shows radiation quantities in SI and non-SI units.
||Roentgen Equivalent Man
Rem Unit Converter
For Further Reading
- ↑ 1.0 1.1 U.S.NRC. (2016, June 21).REM (Roentgen equivalent man) [Online]. Available: http://www.nrc.gov/reading-rm/basic-ref/glossary/rem-roentgen-equivalent-man.html
- ↑ S.T. Cantril et al., “The Tolerance Dose,” United States Atomic Energy Commission, Argonne National Laboratory, Technical Information Division, Oak Ridge, Tenn. MDDC-1100. 1945.
- ↑ E.E. Anderson. “Units of Radiation and Radioactivity.” Public Health Reports, Oak Ridge National Laboratory, Oak Ridge, Tenn. Vol. 67, No. 3, March 1952. Available:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2030726/pdf/pubhealthreporig01075-0073.pdf
- ↑ U.S.NRC. (2015, December 02). Units od radiation dose [Online]. Available: http://www.nrc.gov/reading-rm/doc-collections/cfr/part020/part020-1004.html
- ↑ NIST. (2016, February 10). Chapter 5. Guide to the SI, Units Outside the SI [Online]. Available: http://www.nist.gov/pml/pubs/sp811/sec05.cfm
- ↑ NIST. (2016, February 19). Chapter 4. Guide to the SI, The Two Classes of SI Units and the SI Prefixes [Online]. Available: http://www.nist.gov/pml/pubs/sp811/sec04.cfm