Article

ABSOLUTE MEASUREMENT OF ~(99m)Tc ACTIVITY

Dexi GuCHANG JINYING Southwest Institute of Nuclear Physics and Chemistry

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atomsjournal1986en

ABI

Abstract

The experimental technique and results of ~(99m)Tc absolute activity measurementby 4πβ-γ coincidence method are described. The detection efficiency of ~(99m)Tc γrays (2.12, 140.5 and 142.6 keV) and their internal conversion electrons in 4πβcounter as a function of the VYNS foil thickness is measured. It is obtained thatafter complete absorption of 2.12 keV γ ray by the foils, the contribution fromeach ~(99m)Tc decay to the β in 4πβ counter is 0.1117±0.0005.

Topics

Medical Imaging Techniques and Applications Superconducting Materials and Applications Atomic and Subatomic Physics Research

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