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adp
container of such shape as to assure uniformity of radia-
tion strength.
The chenical and mechanical steps necessary in
the processing involve dissolving the soluble radium bronido
salt in water, adding a soluble sulphate salt to form in-
soluble radius sulphate, filtration or evaporation of the
solution, and the drying and complete dehydration of the
radium sulphate. The dried salt 1a then put into a pro-
perly designed netal conteiner, usually a cylinder having
a dismeter equal to ita height, and then densely packed
or compressed. The container is then soldered or brazed
to make it air tight and inserted into e larger container
of aluminum or steel which may be spherical, egg-shaped,
bexagonel, or some other regular geometric form. The outer
container 1a designed to facilitate manipulation and, also to
assure unifora rediation intensity.
Minimum volume of radiation source is important
because of the need of using as close to a point source as
possible in order to improve the sharpness of the pieture.
Uniform radiation emission is important to achieve uniform
exposure of the photographic film. Air and gas tight seal-
ing 1s essential to rotain the radon and thus the decay element
bissuth 214 which enits the ganma ray, and such sealing must be
perfect to assure constancy of rediating strength after radio-
astive equilibrium reached. Immediatoly after the capsule
-12-
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Document data
- ID
- 75730541
- Core
- doc
- Type
- document
DTO data
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Context sent to Scholar
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"ocrText": "adp\ncontainer of such shape as to assure uniformity of radia-\ntion strength.\nThe chenical and mechanical steps necessary in\nthe processing involve dissolving the soluble radium bronido\nsalt in water, adding a soluble sulphate salt to form in-\nsoluble radius sulphate, filtration or evaporation of the\nsolution, and the drying and complete dehydration of the\nradium sulphate. The dried salt 1a then put into a pro-\nperly designed netal conteiner, usually a cylinder having\na dismeter equal to ita height, and then densely packed\nor compressed. The container is then soldered or brazed\nto make it air tight and inserted into e larger container\nof aluminum or steel which may be spherical, egg-shaped,\nbexagonel, or some other regular geometric form. The outer\ncontainer 1a designed to facilitate manipulation and, also to\nassure unifora rediation intensity.\nMinimum volume of radiation source is important\nbecause of the need of using as close to a point source as\npossible in order to improve the sharpness of the pieture.\nUniform radiation emission is important to achieve uniform\nexposure of the photographic film. Air and gas tight seal-\ning 1s essential to rotain the radon and thus the decay element\nbissuth 214 which enits the ganma ray, and such sealing must be\nperfect to assure constancy of rediating strength after radio-\nastive equilibrium reached. Immediatoly after the capsule\n-12-"
}