Actions for Some Remarks Concerning the Absolute Measurement of [beta] Emitters by the 4pi Counter; QUELQUES REMARQUES SUR LA MESURE ABSOLUE DES EMETTEURS [beta] AU COMPTEUR 4pi

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Some Remarks Concerning the Absolute Measurement of [beta] Emitters by the 4pi Counter; QUELQUES REMARQUES SUR LA MESURE ABSOLUE DES EMETTEURS [beta] AU COMPTEUR 4pi

Author
Grinberg, B.
Published
[Place of publication not identified] : [publisher not identified], 1959.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1959.
Physical Description
microopaque : positive ; 8 x 13 cm
Additional Creators
Le Gallic, Y.

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Summary
The precision obtainable with a proportional or Geiger-Mueller 4 pi counter in the determination of radioactivities depends on the precision with which the various corrections are evaluated. One of the most important corrections is the correction for absorption in the film serving as support for the source. To determine conditions in which the absorption could be maintained at a negligible level, a study was made with a 4 pi Geiger-Mueller tube. The performance of the tube using very thin films was determined. Film thicknesses of 5 mu g/cm/sup 2/ were obtained, and such films made it possible to eliminate completely the absorption correction for energies higher than 0.3 Mev. For energies lower than 0.3 Mev, the addition of a coincidence amplifier with resolution time slightly higher than the average transport'' time of the particles eliminates the need for absorption corrections. (J.S.R.)
Report Numbers
A/CONF.15/P/1208
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
NSA number: NSA-13-006725
OSTI Identifier 4267464
Research organization: Commissariat a l'Energie Atomique, Paris.
View MARC record | catkey: 38045992