✦ LIBER ✦

Effect of an External Electric Field on the Decay Constant of 99Tcm in Halogen Complexes

✍ Scribed by H. Leuenberger; P. Huber; P. Nyikos; H. R. Kobel; H. Seiler

Publisher: John Wiley and Sons
Year: 1972
Tongue: German
Weight: 467 KB
Volume: 55
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19720550322

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✦ Synopsis

Abstract

A positive change Δλ/λ of the decay constant of ^99^Tc^m^ has been observed on the application of an external electric field in K~2~TcX~6~ (X = F, Cl, Br, I). For its investigation the Tc‐complexes were embedded as small conglomerates or more or less as isolated single molecules in a powder of high dielectric constant, which was then compressed into a thin layer of about 0.2 mm and inserted between two capacitor plates. The change Δλ/λ depends on the strength of the chemical bond of ^99^Tc^m^. As a first approximation Δλ/λ was assumed to be linearly dependent upon the electric field. The experimental results with an external field of 10~4~ V/cm are:
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A relationship between Δλ/λ and the electro‐negativities of the ligand atoms could be established. Difficulties encountered in the theoretical calculation of Δλ/λ are discussed.

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