Automatic track counting in gamma-exposed polymer foils with a jumping spark counter

Nucleonics

“…Thus de Groot et al (18) determined ng amounts of sulfur in 5-gL solution. McCullough and Vickers (19) determined copper and iron in pL samples of serum. Alder et al ( 20) determined trace metals in 1 cm of human hair.…”

“…Track counting is still a major problem and the spark discharge technique still appears to be the method of choice ( 18). An automatic and continuous spark counting system (19) could make the counting operation more routine. Using a discharge counter, uranium in water was measured at a level of 0.1-10 x 10"9 g (20) while a detection limit of 5 X 11 g was predicted.…”