Determination of U-chain concentration in NaI(Tl) scintillator by delayed coincidence method

Authors :: Umehara, S.
Fushimi, K.
Koori, N.
Kudomi, N.
Kume, K.
Kuramoto, H.
Nakayama, S.
Shimojo, T.
Takahisa, K.
Tsubakida, R.
Tsujimoto, Y.
Yoshida, S.
Source :: Nuclear Instruments & Methods in Physics Research Section A. Sep2002, Vol. 490 Issue 1/2, p271. 5p.
Publication Year :: 2002
Abstract: We have accurately determined U-chain concentration in a detector by means of the <f>β</f>–<f>α</f> delayed coincidence method. This method can measure the radioactivity of the order of <f>10−7 Bq/kg</f>. It corresponds to the concentration of the order of <f>0.01 ppt</f> under the assumption that the U-chain is in the secular radioactive equilibrium, by a signal-to-noise ratio of one to one. [Copyright &y& Elsevier]

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