Abstract

X-ray exposures are supposed to result in the production of a considerable amount of internal latent image. However, in a motion-picture positive emulsion hardly any internal latent image could be developed after exposure to x-rays, at the temperature of liquid nitrogen as well as at room temperature. Since the existence of a marked Herschel effect shows that a considerable number of grains carry not more than one surface center, and that of minimum size, the question arises as to where the many hundred silver atoms have gone which were produced in the grain by the absorption of one x-ray quantum. They could have disappeared by rebromination in the absence of a halogen acceptor, or they could be too finely distributed to act as development centers. A reversal of the Herschel effect at high densities, after an x-ray exposure at the temperature of liquid nitrogen, argues for the second assumption.

© 1949 Optical Society of America

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Corrections

G. Kornfeld, "Errata*: Latent-Image Distribution by X-Ray Exposures," J. Opt. Soc. Am. 40, 883-883 (1950)
https://www.osapublishing.org/josa/abstract.cfm?uri=josa-40-12-883

References

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  1. A. Kempf, Zeits. f. wiss. Phot. 36, 235 (1937);H. Sauvenier, Bull. Soc. Roy. Sci. Liège 16, 54 (1947);H. Tellez-Plasencia, Sci. et Ind. Phot. 19, 451 (1948).
  2. S. E. Sheppard and A. P. H. Trivelli, Phik Mag. 9, 787 (1931).
  3. G. Kornfeld and T. H. James, J. Opt. Soc. Am. 33, 615 (1943);G. Kornfeld, J. Opt. Soc. Am. 39, 490 (1949).
    [Crossref]
  4. A. Hautot, Bull. Soc. Roy. Sci. Liège 12, 647 (1943).

1943 (2)

1937 (1)

A. Kempf, Zeits. f. wiss. Phot. 36, 235 (1937);H. Sauvenier, Bull. Soc. Roy. Sci. Liège 16, 54 (1947);H. Tellez-Plasencia, Sci. et Ind. Phot. 19, 451 (1948).

1931 (1)

S. E. Sheppard and A. P. H. Trivelli, Phik Mag. 9, 787 (1931).

Hautot, A.

A. Hautot, Bull. Soc. Roy. Sci. Liège 12, 647 (1943).

James, T. H.

Kempf, A.

A. Kempf, Zeits. f. wiss. Phot. 36, 235 (1937);H. Sauvenier, Bull. Soc. Roy. Sci. Liège 16, 54 (1947);H. Tellez-Plasencia, Sci. et Ind. Phot. 19, 451 (1948).

Kornfeld, G.

Sheppard, S. E.

S. E. Sheppard and A. P. H. Trivelli, Phik Mag. 9, 787 (1931).

Trivelli, A. P. H.

S. E. Sheppard and A. P. H. Trivelli, Phik Mag. 9, 787 (1931).

Bull. Soc. Roy. Sci. Liège (1)

A. Hautot, Bull. Soc. Roy. Sci. Liège 12, 647 (1943).

J. Opt. Soc. Am. (1)

Phik Mag. (1)

S. E. Sheppard and A. P. H. Trivelli, Phik Mag. 9, 787 (1931).

Zeits. f. wiss. Phot. (1)

A. Kempf, Zeits. f. wiss. Phot. 36, 235 (1937);H. Sauvenier, Bull. Soc. Roy. Sci. Liège 16, 54 (1947);H. Tellez-Plasencia, Sci. et Ind. Phot. 19, 451 (1948).

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Figures (6)

F. 1
F. 1

Contrast motion-picture positive emulsion used throughout this investigation. Herschel effect after exposure to light. 30-minute infra-red exposure. Development in D-16. Four minutes at 68°F.

F. 2
F. 2

Herschel effect after exposure to x-rays at room temperature for five minutes. 90-minute infra-red exposure. Development in D-16. Four minutes at 68°F.

F. 3
F. 3

Total development of latent image after five-minute x-ray exposure at room temperature.

F. 4
F. 4

Development of internal latent image after five-minute x-ray exposure at room temperature.

F. 5
F. 5

Development of internal latent image after twenty-minute x-ray exposure at the temperature of liquid nitrogen.

F. 6
F. 6

Herschel effect after exposure to x-rays at the temperature of liquid nitrogen for twenty minutes. 90-minute infra-red exposure. Development in D-19. Four minutes at 68°F.