Summary
The fading of α-particle tracks in Ilford C 2 emulsions has been studied. After irradiation by an alpha source, the photographic plates were stored in air, at various temperatures for a period of four months. They were then compared with a standard plate which had been developed immediately after irradiation. Amongst the plates stored at-35 °C no particle track fading was noticed, neither was a diminution in the number of tracks. Amongst those plates stored at 4°C and at 15 °C, the grain density of the particle tracks had lessened and respective percentage losses of 38 % and 72 % in the number of tracks were noticed.
Riassunto
Si è studiata l’evanescenza delle tracce di particelle α nelle emulsioni Ilford C2. Dopo irradiazione con una sorgente α, le lastre furono oonservate in aria, a varie temperature, per un periodo di quattro mesi. Furono poi confrontate con una lastra campione sviluppata immediatamente dopo l’irradiazione. Nelle lastre conservate a-35 °C non fu riscontrata alcuna evanescenza nè diminuzione del numéro di tracce. Nelle lastre conservate a 4 °C e a 15 °C la densità di grani delle tracce delle particelle è diminuita e furono osservate delle diminuzioni percentuali del numero di tracce rispettivamente del 38% e del 72%.
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Chercheur à l’Institut Interuniversitaire des Sciences Nucléaires.
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Deutsch, S., Piociotto, E. Effacement des alpha dans les plaques ilford C 2. Nuovo Cim 6, 953–955 (1957). https://doi.org/10.1007/BF02745822
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DOI: https://doi.org/10.1007/BF02745822