Disintegration rate measurement of a 152Eu solution.
The procedure followed by the Laboratório de Metrologia Nuclear at the IPEN-CNEN/SP, in São Paulo, for the standardization of 152Eu is described. The disintegration rate of 152Eu has been measured using the 4pi beta-gamma coincidence technique, using a 4pi proportional counter, filled with P-10 gas and operated at 0.1 MPa, coupled to one HPGe detector for the gamma-ray emission. Two discrimination windows were set in the gamma-channel, one related to the beta branch (344 keV) and the other related to the electron capture events (1408.03 keV), in order to determine the counting efficiencies for beta, X-ray and Auger electron events in the proportional counter. The activity of solution was determined by a biparametric extrapolation curve obtained for the two selected gamma-windows.
Koskinas
Marina F
MF
Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), Laboratório de Metrologia Nuclear-Centro do Reator de Pesquisas-CRPq, São Paulo, SP, Brazil.
Fonseca
Kátia A
KA
Dias
Mauro S
MS