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Release Studies of Atomic Technetium
Author(s) -
Ames F.,
Kluge H.J.,
Otten E.W.,
Suri B. M.,
Venugopalan A.,
Herrmann G.,
Rimke H.,
Trautmann N.,
Kirchner R.,
Eichler B.
Publication year - 1991
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19915030102
Subject(s) - technetium , materials science , laser , desorption , ionization , ion , analytical chemistry (journal) , atomic physics , mass spectrometry , adsorption , radiochemistry , chemistry , optics , physics , nuclear chemistry , organic chemistry , chromatography
Application of a laser ion source (LIS) is a promising new technique for trace analysis with high efficiency and selectivity. One of the problems which can limit its efficiency attained in practice is the adsorption of sample atoms on the hot walls of the LIS cavity. We have studied the release of atomic technetium from different wall materials at temperatures up to 2500 K. For these investigations resonance ionization of technetium atoms applying a copper vapour pumped dye laser system and γ‐spectrometry of 6‐h 99m Tc have been used. Theoretical calculations of the heat of desorption for technetium on different wall materials are presented and compared with experimental data. Though the results reported concern technetium, most of the considerations are quite general for a laser ion source.