radiation hazard

https://doi.org/10.1351/goldbook.R05055
@HT06827@ that exists in a region where there is a @R05048@ field, other than what is considered to be normal @B00580@.
Source:
PAC, 1982, 54, 1533. (Glossary of terms used in nuclear analytical chemistry (Provisional)) on page 1549 [Terms] [Paper]