Visual colour indicators of ionising radiation dosage - contain light fast fluorescent dyestuff of triaryl pyrazoline series in polymer film

摘要

These indicators comprise non-halogenated polymer films contg. a light-fast fluorescent dyestuff of the triaryl-pyrazoline series of formula (I) (in which R1 and R2 are opt. substd. aryl; R3 is an isomeric naphthoylenobenzimidazole of formula (II) or phenylnaphthalimide gp. of formula (III). They are suitable for rapid determn. of the dosage with high-power gamma-plants and electron accelerators and for monitoring the dosage in industrial irradiation processes, e.g. for cold sterilisation of medical equipment. It is possible to combine rapid visual determn. of dosage with measurement by an objective parameter.