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. 2020 Oct 29;19:1536012120966405. doi: 10.1177/1536012120966405

Table 4.

Isotopes Used in Studies of Soils, Sediments, and Model Porous Media, With Half-Lives and Forms Used.

Isotope Half-life Form(s) used in imaging porous media
11C 20.4 m [11C]CO2 114
18F 109.8 m [18F]F− 116,119,120 [18F]FDG 115,117,118,112,113
64Cu 12.7 h [64Cu]Cu2+,116 [64Cu]Cu2+-2-methyl-4-chlorophenoxyacetic acid (MCPA) 120