E. Hoinkis et H. Matiske, A MASS-SPECTROMETRIC STUDY OF THE THERMAL-DECOMPOSITION OF SMALL QUANTITIES OF AGNO3, CSNO3 AND CS2CO3, Journal of nuclear materials, 223(3), 1995, pp. 218-230
Citations number
44
Categorie Soggetti
Nuclear Sciences & Tecnology","Mining & Mineral Processing","Material Science
The thermal decomposition of minute quantities of AgNO3, CsNO3 and Cs2
CO3 on platinum and on glass-like carbon was studied by use of a mass
spectrometer. We observed that AgNO3 decomposed at 700 K and Ag evapor
ated at T > 1100 K. In contrast, CsNO3 evaporated mainly as molecules.
Cs was found to be the main species in the gas flow from a Cs2CO3 fil
led Knudsen cell lined with glass-like carbon. The appearance potentia
ls of the molecular species were determined as 10.5 eV for Cs-2(+), 7.
0 eV for Cs2O+, and 5.6 eV for Cs2CO3+. Platinum catalyzes the decompo
sition of minute Cs2CO3 quantities to provide mainly cesium. A method
for the fast and automatic measurement of appearance potentials was de
veloped.