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Titolo:
Surface ionization of alkaline-earth iodides in double-filament system
Autore:
Kawai, Y; Nomura, M; Murata, H; Suzuki, T; Fujii, Y;
Indirizzi:
Tokyo Inst Technol, Nucl Reactors Res Lab, Meguro Ku, Tokyo 1528550, JapanTokyo Inst Technol Tokyo Japan 1528550 , Meguro Ku, Tokyo 1528550, Japan
Titolo Testata:
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
fascicolo: 1-2, volume: 206, anno: 2001,
pagine: 1 - 5
SICI:
1387-3806(20010226)206:1-2<1:SIOAII>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
HALIDES;
Keywords:
mass spectrometry; double filament; surface ionization; alkaline-earth iodide; dissociation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
8
Recensione:
Indirizzi per estratti:
Indirizzo: Fujii, Y Tokyo Inst Technol, Nucl Reactors Res Lab, Meguro Ku, Tokyo 1528550, Japan Tokyo Inst Technol Tokyo Japan 1528550 Ku, Tokyo 1528550, Japan
Citazione:
Y. Kawai et al., "Surface ionization of alkaline-earth iodides in double-filament system", INT J MASS, 206(1-2), 2001, pp. 1-5

Abstract

The ionization sequences of alkaline iodides in a double-filament surface-ionization mass spectrometry system were studied. The test samples were strontium iodide and barium iodide. The ionization parameters, epsilon, at thesurface of the ionization filament (IF) epsilon were determined by Arrhenius' plots. It was found that ionization parameters are dependent on evaporation filament (EF) temperature. This phenomenon is the same as that observed in the case of calcium iodide in our previous study. The findings can be explained in the following way. At low EF temperatures, the sample vapor arrives at the ionization filament in the chemical form in which the sample was initially loaded on the EF. Therefore, the sample vapor must gain the sum of dissociation and ionization energies at the IF. At high EF temperatures, the sample vapor can dissociate on or near the EF. As a result, the apparent ionization parameters changed with the EF temperature. (Int J Mass Spectrom 206 (2001) 1-5) (C) 2001 Elsevier Science B.V.

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Documento generato il 28/01/20 alle ore 21:04:54