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|Title:||Filament Chemistry of Uranium in Thermal Ionisation Mass Spectrometry|
|Authors:||KRAIEM MONIA; MAYER Klaus; GOUDER Thomas; SEIBERT ALICE; WISS Thierry; HIERNAUT Jean-Pol|
|Citation:||JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY vol. 25 p. 1148-1144|
|Publisher:||ROYAL SOC CHEMISTRY|
|Type:||Articles in periodicals and books|
|Abstract:||In this work, the filament chemistry of uranium was investigated under conditions encountered in thermal ionisation mass spectrometry (TIMS), using a rhenium filament material without the addition of ionisation enhancers. The investigations were conducted using several analytical techniques such as X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and the modified-Knudsen Cell Mass Spectrometry (KCMS). The techniques provide useful information on the mechanisms associated with uranium evaporation and ionisation using a rhenium filament as surface ionisation source. The experimental results showed the sample behaviour to be consistent with the existence of a typical UO2 phase forming on the filament surface. The composition of the resulting vapour phase is dominated by the presence of uranium oxide species, with a smaller fraction of uranium ions.|
|JRC Institute:||Nuclear Safety and Security|
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