A multicounter system consisting of an integrated array of flow counters for the scanning of ultra-low-level radioactivity on paper and thin-layer chromatograms was developed. Experience with routine measurements over a prolonged period has proved the advantages of this system over other systems, such as liquid scintillation counting. A description of the flow counter system is given together with an outline of an electronic data acquisition system, and results are presented to demonstrate its features.
Bøtter-Jensen, L., Hansen, H. J. M., & Theodorsson, P. (1977). A Multicounter System for Scanning Ultra-Low-Level Radiochromatograms. Nuclear Instruments and Methods, 144(3), 529-532. https://doi.org/10.1016/0029-554X(77)90019-2