absolute full energy peak efficiency

https://doi.org/10.1351/goldbook.A00023
Of a @R05048@ @S05837@, the @C01377@ when considering only the events recorded in the @F02546@.
Source:
PAC, 1982, 54, 1533. (Glossary of terms used in nuclear analytical chemistry (Provisional)) on page 1543 [Terms] [Paper]