Standardisation of 204Tl at IRMM
IRMM participated in a recent international comparison for the standardisation of a 204Tl solution organised by BIPM. The activity concentration of the 204Tl solution was measured at IRMM using 3 independent methods; Liquid Scintillation Counting using the CIEMAT/NIST method, 4pi-CsI counting and 4pibeta counting using a large pressurised proportional counter. This article describes the measurements in detail and discusses potential problems in the standardisation of 204Tl.
Hult
M
EC-JRC-IRMM, Geel, Belgium. hult@irmm.jrc.be
Altzitzoglou
T
Denecke
B
Persson
L
Sibbens
G
Reher
DF