Long lived CH2+ and CD2+ dications

Citation
I. Ben-itzhak et al., Long lived CH2+ and CD2+ dications, INT J MASS, 192, 1999, pp. 157-163
Citations number
19
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
ISSN journal
13873806 → ACNP
Volume
192
Year of publication
1999
Pages
157 - 163
Database
ISI
SICI code
1387-3806(19990927)192:<157:LLCACD>2.0.ZU;2-2
Abstract
A search for long lived CH2+ and CD2+ dications formed in fast charge strip ping collisions of CH+ and CD+ on Ar was conducted. An experimental method based on the detection of the H (or D) fragments of the dication was develo ped, in order to eliminate possible confusion with C-13(2+) for the first a nd N-14(2+) for the latter. The flight time of these dications through the apparatus is about 70 ns, well below the 3 mu s time associated with earlie r observations of CH2+. Our measurements indicate that no long lived states of either of these dications are formed in fast charge stripping collision s. However, this result does not exclude the possibility that long lived st ates, like the excited A (2)Sigma(+) metastable state, are populated in slo w charge stripping collisions. (C) 1999 Elsevier Science B.V.