collimation
Copy
https://doi.org/10.1351/goldbook.C01154
The limiting of a beam of radiation to the required dimensions and angular spread.
Source:
PAC, 1982,
54
, 1533. 'Glossary of terms used in nuclear analytical chemistry (Provisional)' on page 1538 (https://doi.org/10.1351/pac198254081533)