background

of a radiation measuring device
https://doi.org/10.1351/goldbook.B00577
The term employed to designate the value indicated by a @R05048@ measuring device in the absence of the source whose radiation is to be measured, when the device is placed under its normal conditions of operation.
Source:
PAC, 1982, 54, 1533. (Glossary of terms used in nuclear analytical chemistry (Provisional)) on page 1536 [Terms] [Paper]