relative biological effectiveness

of radiation
The ratio of the appropriate value of the biological @E01897@ of the radiation in question to that of @X06703@ with an average @S05801@ of 100 ion pairs per micron of water, for the particular biological effect under consideration and for the condition under which the @R05048@ is received.
PAC, 1982, 54, 1533. (Glossary of terms used in nuclear analytical chemistry (Provisional)) on page 1551 [Terms] [Paper]