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Long-term stability of measurements in the 60Co field at the BIPM

A-M Perroche et al 1995 Metrologia 32 43-50   doi: 10.1088/0026-1394/32/1/005  Help

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A-M Perroche1,2 and M Boutillon1
1 Bureau International des Poids et Mesures, Pavillon de Breteuil, F-92312 Sèvres Cedex, France
2 Office de Protection contre les Rayonnements Ionisants, 78110 Le Vésinet, France

Abstract. A critical review is presented of the parameters which are continuously or periodically verified in order to maintain the long-term stability of BIPM standards of air kerma and absorbed dose for 60Co. Some problems encountered in the measurement of the ionization current and in the determination of calibration factors are described and resolved.

Print publication: Issue 1 (1995)
Received 22 November 1994

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