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Limit to the measurement of feeble activities using ionization chambers; Limite des possibilites de mesure de faibles activites au moyen de chambres d'ionisation

Abstract

The present account based on experience acquired in the Biology Service, in measuring feeble activities of tritium and carbon-14 has been prepared for the benefit hose who have to carry out measurements of feeble activities using ionization chambers. Precision are given on the behaviour and actual performance of vibrating condenser electrometers, based on approximately two years operating experience. It is shown that the possibilities of utilisation are not limited as is generally believed by insufficient sensitivity and stability of the electronic equipment, but by the existence of various parasitic phenomena coming from the ionization chamber itself, which make very difficult the measurement of ionization currents which are less than 10{sup -14} A. (author)Fren. [French] Le present compte rendu, base sur l'experience acquise au Service de Biologie dans la mesure de faibles activites de tritium et de carbone-14, est redige a l'intention des personnes ayant a effectuer des mesures de tres faibles activites au moyen de chambres d'ionisation. Il donne des precisions sur le comportement et les performances reelles des electrometres a condensateur vibrant, basees sur environ deux ans d'utilisation, et demontre que les possibilites de mesure ne sont pas limitees - comme on le croit generalement - par l'insuffisance de  More>>
Authors:
Briere, M [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1958
Product Type:
Technical Report
Report Number:
CEA-R-942
Resource Relation:
Other Information: 11 refs
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACTIVITY METERS; BACKGROUND NOISE; BACKGROUND RADIATION; CAPACITORS; COMPARATIVE EVALUATIONS; CONDENSER IONIZATION CHAMBERS; DC AMPLIFIERS; ELECTROMETERS; FLUCTUATIONS; LOW LEVEL COUNTING; PERFORMANCE TESTING; RESIDUAL INTERACTIONS; SENSITIVITY; TIME RESOLUTION; TRITIUM METERS
OSTI ID:
20900997
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR07R0942063220
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
25 pages
Announcement Date:
Aug 28, 2007

Citation Formats

Briere, M. Limit to the measurement of feeble activities using ionization chambers; Limite des possibilites de mesure de faibles activites au moyen de chambres d'ionisation. France: N. p., 1958. Web.
Briere, M. Limit to the measurement of feeble activities using ionization chambers; Limite des possibilites de mesure de faibles activites au moyen de chambres d'ionisation. France.
Briere, M. 1958. "Limit to the measurement of feeble activities using ionization chambers; Limite des possibilites de mesure de faibles activites au moyen de chambres d'ionisation." France.
@misc{etde_20900997,
title = {Limit to the measurement of feeble activities using ionization chambers; Limite des possibilites de mesure de faibles activites au moyen de chambres d'ionisation}
author = {Briere, M}
abstractNote = {The present account based on experience acquired in the Biology Service, in measuring feeble activities of tritium and carbon-14 has been prepared for the benefit hose who have to carry out measurements of feeble activities using ionization chambers. Precision are given on the behaviour and actual performance of vibrating condenser electrometers, based on approximately two years operating experience. It is shown that the possibilities of utilisation are not limited as is generally believed by insufficient sensitivity and stability of the electronic equipment, but by the existence of various parasitic phenomena coming from the ionization chamber itself, which make very difficult the measurement of ionization currents which are less than 10{sup -14} A. (author)Fren. [French] Le present compte rendu, base sur l'experience acquise au Service de Biologie dans la mesure de faibles activites de tritium et de carbone-14, est redige a l'intention des personnes ayant a effectuer des mesures de tres faibles activites au moyen de chambres d'ionisation. Il donne des precisions sur le comportement et les performances reelles des electrometres a condensateur vibrant, basees sur environ deux ans d'utilisation, et demontre que les possibilites de mesure ne sont pas limitees - comme on le croit generalement - par l'insuffisance de sensibilite et de stabilite de l'appareillage electronique, mais par l'existence de divers phenomenes parasites dont la chambre d'ionisation est le siege et qui rendent tres difficiles la mesure de courants d'ionisation inferieurs a 10{sup -14} A. (auteur)}
place = {France}
year = {1958}
month = {Jul}
}