EFFECT OF SOLUTIONS OF URANIUM SALTS AT VARIOUS pH ON THE SENSITIVITY OF IONOGRAPHIC EMULSIONS

Journal Article · Fri Jan 01 04:00:00 EST 1960 · Acad. rep. populare Romine, Inst. fiz. atomica si Inst. fiz., Studii cercetari fiz.

OSTI ID:4100171

Nicolae, M; Labau, V

The effect of concentrated solutions of various uranium salts in the interval from pUO/sub 2/ = 0.097 STA(UO/sub 2/(NO/sub 3/)/sub 2/i - 6H/sub 2/O) 20%! to pUO/sub 2/ = 3.75 STA(5.4 UO2/sup (//sub 3/)/sub 2/ - 6H/sub 2/O) 10->s/ sup 4/%! on io nographic emulsions was studied in the case where the pH of the solutions was previously reduced to a value in the interval pH 6 to7. This study presents a practical interest since, in order to study the processes of uranium fission and of some of its nuclear reactions by means of the photographic method, it is necessary to introduce in the photographic emulsion a quantity of uranium salt. The work also has a theoretical interest dealing with the problem of the influence of strange ions introduced in large quantities in the emulsion on the efficiency of the formation of the latent image. In the method employed, the effect of the concentration of the UO/sub 2/ ions on the intensity of the development was avoided by prolonged washing of the plate in cold water before the development operation. It was shown that the solution of uranyl nitrate neutralized (pH 6.2) with a concentration of uranyl ions less than 0.2 N (5% UO/ sub 2/NO/sub 3/)/sub 2/ - 6H/sub 2/O) does not affect in a significant fashion the sensitivity of ionographic emulsions. The solutions of uranyl nitrate neutralized with a concentration of uranyl ions higher than 0.2 N desensitizes the emulsions. The effect of desensitization is partially reversible, which is easily explainable by supposing that the effect is caused by the effect of the double electric layer of the ions of the solution, adsorbed on the crystal surface or in the dibuse layer. (tr-auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-009563
• OSTI ID: 4100171
• Journal Information: Acad. rep. populare Romine, Inst. fiz. atomica si Inst. fiz., Studii cercetari fiz., Journal Name: Acad. rep. populare Romine, Inst. fiz. atomica si Inst. fiz., Studii cercetari fiz. Vol. Vol: 11
• Country of Publication: Country unknown/Code not available
• Language: Rumanian

Related Subjects

ADSORPTION
CRYSTALS
EFFICIENCY
ELECTRICITY
EMULSIONS
FISSION
IMAGES
IONS
LAYERS
NUCLEAR REACTIONS
PHOTOGRAPHY
PHYSICS
PLATES
SALTS
SENSITIVITY
SOLUTIONS
SURFACES
URANIUM
URANIUM DIOXIDE
URANYL NITRATES
WATER