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BONELLA Sara
Physics department, University Rome 1 "La Sapienza"
MIRKIN Michael
Queens College - Department of chemistry and Biochemistry - New York - USA
HALLE Bertil
Université de Lund - Suède
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Accueil Publications Ionization and fragmentation of water clusters by fast highly charged ions

Ionization and fragmentation of water clusters by fast highly charged ions

TitreIonization and fragmentation of water clusters by fast highly charged ions
Type de publicationJournal Article
Nouvelles publications2009
AuteursAdoui, L, Cassimi A, Gervais B, Grandin JP, Guillaume L, Maisonny R, Legendre S, Tarisien M, Lopez-Tarifa P, Politis MF, du Penhoat MAH, Vuilleumier R, Gaigeot MP, Tavernelli I, Alcami M, Martin F
JournalJournal of Physics B-Atomic Molecular and Optical Physics
Volume42
Fascicule7
Année de publicationApr
Numéro0953-4075
Accession NumberISI:000264504900004
RésuméWe study the dissociative ionization of water clusters by impact of 12 MeV/u Ni25+ ions. Cold target recoil ion momentum spectroscopy (COLTRIMS) is used to obtain information about stability, energetics and charge mobility of the ionized water clusters. An unusual stability of the H9O4+ ion is observed, which could be the signature of the so-called Eigen structure in gas-phase water clusters. From the analysis of coincidences between charged fragments, we conclude that charge mobility is very high and is responsible for the formation of protonated water clusters, (H2O)(n)H+, that dominate the mass spectrum. These results are supported by Car-Parrinello molecular dynamics and time-dependent density functional theory simulations, which also reveal the mechanisms of such mobility.
URL<Go to ISI>://000264504900004
DOI10.1088/0953-4075/42/7/075101
Importer un fichierIonization and fragmentation of water clusters by fast highly charged ions