Community Research and Development Information Service - CORDIS

Abstract

In the frame of the CCRI(II) working group on (204)Tl, dedicated to investigate the problem and explain the reasons for the discrepancy between methods in standardisation of (204)Tl, IRMM was assigned the task of studying the influence of self-absorption in solid sources of (204)Tl. The problem was investigated by measuring quantitative solid sources of different carrier content, prepared by employing a special source drying technique, developed at IRMM. The results of 4p liquid scintillation spectrometry were used as a reference since this method is not affected by self absorption.

After correction for foil absorption and non-detected X-rays, the specific activity showed a linear relation to the logarithm of the superficial mass. For a typical source, the self-absorption correction for (204)Tl was found to be as high as 8%. This article describes a way to minimise and correct for self-absorption in solid sources of (204)Tl or nuclides with similar decay properties. .

Additional information

Authors: JOHANSSON L, JRC, Institute for Reference Materials and Measurements (IRMM), Geel, (BE);SIBBENS G, JRC, Institute for Reference Materials and Measurements (IRMM), Geel, (BE);ALTZITZOGLOU T, JRC, Institute for Reference Materials and Measurements (IRMM), Geel, (BE);DENECKE B, JRC, Institute for Reference Materials and Measurements (IRMM), Geel, (BE)
Bibliographic Reference: An oral report given at: ICRM 2001 Organised by: Physikalisch-Technische Bundestalt (PTB) Held in: Brannschweig (DE) 14-18 May, 2001
Record Number: 200013489 / Last updated on: 2001-07-24
Category: PUBLICATION
Original language: en
Available languages: en