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- W3846765 abstract "ABS>Considerable effort was devoted to the development of the scientific foundation of a radioactive source industry in Hungary; these sealed BETA or gamma sources are widely applied in industry, especially for the fabrication of thickness gages used in the cardboard, plastics, rubber, and metal-foil industry. The Co/sup 60/ sources are prepared by irradiating a Co--Ni alloy, or sometimes even pure Co, in the Hungarian reactor. The activated metal is sealed in an epoxy resin and cured at 180 un. Concent 85% C. Zn/sup 65/ sources are somewhat less used because of their shorter half life and lower specific activity. The isotope is prepared by the irradiation of Zn/sup 64/ in a cyclotron or reactor; the activated metal is treated like the Co/sup 60/. The Cs/sup 137/, the gamma - radiation of which is due to the Ba/sup 137/ formed during its decay, is prepared by separating it from the flssion products of U; it is used in the fabrication of sealed sources in the form of its salts. Contamination of the external surfuce was noted with imported foreign sources, due to migration of the active material as a result of the corrosion of the container. This problem was avoided bymore » preparing the source in the following manner: powdered, low-melting glass was impregnated with the Cs/sup 137/ solution, then the mixture was dried, melted, and encapsulated. An alternate method consisted in the impregnation of a porous ceramic rod. Ir/sup 192/ sources, prepared by the irradiation of Ir/sup 191/, were found useful because of the good chemical resistance of Ir. (TTT)« less" @default.
- W3846765 created "2016-06-24" @default.
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- W3846765 date "1963-03-01" @default.
- W3846765 modified "2023-09-27" @default.
- W3846765 title "RESULTS IN PRODUCING CLOSED RADIATION SOURCES IN HUNGARY. PART I" @default.
- W3846765 hasPublicationYear "1963" @default.
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