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Report, October , 1949

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is prepared, little or no gamma radiation is enitted since at that time there are only negligible quantities of the gnama ray emitting element present. A period of thirty days must elapse before the quantity of this ele- sent comes into existence and maximua ray strength is reached. The finished capsule 16 usually designed so that remote handling is possible and needless exposure of poz- sonnel avoided. This may involve a nagnetic capsule or e capsule with provision for attachment of a chain or long handled support. 5. Neutron sources utilizing alpha radiation. These sources consist of an intimate mixture of finely pow dered beryllium netal and metallic radium or radium salt, sealed in a hoavy walled, gas-tight metal container., Neu- trons, that is, neutral particles which penetrate heavy cetals with ease and which also penetrato the nucleus of an atom, causing fission or disruption of the atom, are anitted by beryllium whon bombarded by alpha particles. In preparing a noutron source, sevoral steps are required. First, the soluble radiua bronide Balt 1a dissolv- ad in water. Then either of two nethoda may be folloved. A finely divided beryllium pouder may be added to the solution and the water reaoved by evaporation, thus depositing the radium salt on the beryllium crystals. Or, to the radium -13-

Page data

Page
13
Source index
0
Type
photo
Media ID
c532da7055c6734a
Size
unknown

Document data

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75730541
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Context sent to Scholar

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    "ocrText": "is prepared, little or no gamma radiation is enitted since\nat that time there are only negligible quantities of the\ngnama ray emitting element present. A period of thirty\ndays must elapse before the quantity of this ele-\nsent comes into existence and maximua ray strength\nis reached.\nThe finished capsule 16 usually designed so that\nremote handling is possible and needless exposure of poz-\nsonnel avoided. This may involve a nagnetic capsule or\ne capsule with provision for attachment of a chain or long\nhandled support.\n5. Neutron sources utilizing alpha radiation.\nThese sources consist of an intimate mixture of finely pow\ndered beryllium netal and metallic radium or radium salt,\nsealed in a hoavy walled, gas-tight metal container., Neu-\ntrons, that is, neutral particles which penetrate heavy\ncetals with ease and which also penetrato the nucleus of\nan atom, causing fission or disruption of the atom, are\nanitted by beryllium whon bombarded by alpha particles.\nIn preparing a noutron source, sevoral steps are\nrequired. First, the soluble radiua bronide Balt 1a dissolv-\nad in water. Then either of two nethoda may be folloved. A\nfinely divided beryllium pouder may be added to the solution\nand the water reaoved by evaporation, thus depositing the\nradium salt on the beryllium crystals. Or, to the radium\n-13-"
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