rad in polymers, in mass spectrometry

https://dx.doi.org/10.1351/goldbook.R05032
Non-SI unit of absorbed dose of radiation, rad = 0.01 Gy.
Source:
PAC, 1996, 68, 957 (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 987