The reduction of a radiation quantity upon passage of radiation through matter resulting from interactions of the radiation with the matter it traverses.
Source:
PAC, 1982, 54, 1533
(Glossary of terms used in nuclear analytical chemistry (Provisional))
on page 1536
Transformed and rewritten from PDF version (entry
http://www.iupac.org/goldbook/A00515.pdf)
by: Miloslav Nic, Jiri Jirat, Bedrich Kosata, ICT Prague, Czech Republic