Determination of137Cs half-life with an ionization chamber.
The half-life of137Cs was measured with an ionization chamber by following the decay of 5 sources over a 30 years period between 1983 and 2013. The ratio between the ionization chamber current for the cesium sources and226Ra source was used for the half-life calculation. The value found for the137Cs half-life is 10,955.2±10.7 days, where the uncertainty evaluation combines type A and B for one standard deviation.
Institute of Radiation Physics, Lausanne University Hospital, Rue du Grand-Pré 1, CH-1007 Lausanne, Switzerland. Electronic address: Frederic.juget@chuv.ch.
Frédéric
F
Juget
Institute of Radiation Physics, Lausanne University Hospital, Rue du Grand-Pré 1, CH-1007 Lausanne, Switzerland.
Youcef
Y
Nedjadi
Institute of Radiation Physics, Lausanne University Hospital, Rue du Grand-Pré 1, CH-1007 Lausanne, Switzerland.
Thierry
T
Buchillier
Institute of Radiation Physics, Lausanne University Hospital, Rue du Grand-Pré 1, CH-1007 Lausanne, Switzerland.
François
F
Bochud
Institute of Radiation Physics, Lausanne University Hospital, Rue du Grand-Pré 1, CH-1007 Lausanne, Switzerland.
Claude
C
Bailat
(137)Cs; Decay measurements; Half-life; Ionization chamber; Uncertainty evaluation