infinite source thickness
For a specified @[email protected], the minimum thickness of a flat preparation of a @[email protected] material where the @[email protected] of the specified radiation at the surface does not increase when the thickness is increased by adding more of similar @[email protected] material.
PAC, 1982, 54, 1533. (Glossary of terms used in nuclear analytical chemistry (Provisional)) on page 1544 [Terms] [Paper]