Two determinations of W for electrons in dry air
- 1 January 1985
- journal article
- Published by IOP Publishing in Physics in Medicine & Biology
- Vol. 30 (1) , 67-75
- https://doi.org/10.1088/0031-9155/30/1/007
Abstract
Two experimental determinations of W, the average energy required to produce an ion pair in dry air, for electrons arising from 60Co radiation, are presented. One is based on calorimetric and ionometric measurements of absorbed dose in graphite, the other on activity and exposure measurements. The values obtained by using the most recent data for the electron stopping powers are W/e=33.96+or-0.08 and 33.81+or-0.14 J C-1, respectively. The good agreement with the W values from other authors whose methods do not involve stopping powers gives support to the new stopping-power values.Keywords
This publication has 10 references indexed in Scilit:
- Photon mass attenuation and energy-absorption coefficientsPublished by Elsevier ,2002
- Perturbation correction for ionometric determination of absorbed dose in a graphite phantom for60Co gamma raysPhysics in Medicine & Biology, 1983
- Determination du rendement du dosimetre au sulfate ferreux dans un faisceau d'electrons de 35 MeVPhysics in Medicine & Biology, 1982
- Comparison of Cobalt-60 Exposure Determinations by Calorimetry and by Ionization Chamber TechniquesMetrologia, 1975
- A heat-loss-compensated calorimeter: theory, design, and performanceJournal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1974
- Comparison of Activity and Power Measurements of a 1 Ci60Co SourceMetrologia, 1974
- A Method of Measuring the Activity of a 1 Ci60Co SourceMetrologia, 1974
- A Study of a Graphite Cavity Chamber for Absolute Exposure Measurements of60Co Gamma RaysMetrologia, 1973
- Absolute Energy to Produce an Ion Pair in Various Gases by Beta Particles fromPhysical Review B, 1958
- Absolute Measurement of W air for Sulfur-35 Beta RaysRadiation Research, 1957