This Article Full Text (PDF) Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Oliver, R. Search for Related Content PubMed PubMed Citation Articles by Oliver, R.

Use of a Scintillation Gamma Counter for the Estimation of Iodine 131 in Liquid Samples

Department of Radiotherapy, The Churchill Hospital, Oxford

This excerpt was created in the absence of an abstract.

A type 1186 (A.E.R.E. Harwell) scintillation counter with 2 in. diameter sodium iodide crystal has been inverted and used for assessment of ¹³¹I in 10 cc samples placed on top of the crystal. The background is doubled for some 0·0018 µc in 10 cc compared with 0·0030 µc for the type M6 liquid GM counter tube, and the higher count rates allow shorter counting times. The method has also been used for ⁵⁹Fe and ⁶⁰Co, but the optimum values of the photomultiplier and bias voltages depend on the particular isotope.