title: Autoionography.
abstract: A technique has been established for the autoradiography of beta-emitting radionuclides distributed on thin-layer chromatograms. The technique is derived from medical ionography and produces an electrostatic latent image of the distribution of radioactivity by using a planeparallel ionization chamber filled with a suitable gas. The latent image is formed on a highly insulating plastic sheet which covers one electrode of the ionization chamber and is made visible by methods employed in Xerography or related electrophotographic processes. An introduction to the theoretical basis of autoionography is presented and results of application of the technique are shown for prototype imaging chambers operating at pressures of from 1 to 100 atmospheres. The present sensitivity of autoionography compares favorably with that reported in the recent literature for film or film-fluorographic methods. An advantage of ionography is the simplicity and very low cost involved in producing each ionograph.
mesh_terms: D001345:Autoradiography / Q000295:instrumentation / Q000379:methods; D002855:Chromatography, Thin Layer / Q000379:methods; D011868:Radioisotopes
chemical_list: D011868:Radioisotopes