Bomb-produced chlorine-36 flux calculated from mid-latitude glacial ice of North America.

Chlorine-36 (36C1) concentrations were determined by accelerator mass spectrometry (AMS) for 500 mL (milliliter) water samples prefiltered through the 63-μm nylon media. Concentrations of 36C1 were measured at all five stations and ranged from 4.0 ± 0.1 x 101 atoms/L for the sample only influenced by nuclear-weapons testing and not by waste disposal (station 1) to 2.4 ± .03 x 109 atoms/ L for the sample nearest a plutonium production facility (station 2). The 36C1 concentration for the sample from the station most distant from any waste source and nearest to the Ob Gulf (station 5) was 5.0 ± 0.2 x 108 atoms/L.