抄録
The concentration of the uranium contained within the front glass of CRT (cathode ray tube) of television sets was estimated with fission-track detectors. It was found that atoms of the uranium were distributed almost uniformly within the glass, and that the concentration was 0.6-18ppm for the glass of CRT, whereas it was 0.3-0.7ppm for the other glass such as a laboratory dish. Namely, the value of the highest concentration of the former was several-tens times as large as that of the latter.
