Ionization and fragmentation of water clusters by fast highly charged ions

被引：24

作者：

Adoui, L. ^{[1
]}

Cassimi, A. ^{[1
]}

Gervais, B. ^{[1
]}

Grandin, J.-P. ^{[1
]}

Guillaume, L. ^{[1
]}

Maisonny, R. ^{[1
]}

Legendre, S. ^{[1
]}

Tarisien, M. ^{[1
]}

Lopez-Tarifa, P. ^{[2
]}

Politis, M.-F. ^{[3
]}

du Penhoat, M.-A. Herve ^{[3
]}

Vuilleumier, R. ^{[4
]}

Gaigeot, M.-P. ^{[5
]}

Tavernelli, I. ^{[6
]}

Alcami, M. ^{[2
]}

Martin, F. ^{[2
]}

机构：

[1] Univ Caen Basse Normandie, CNRS, UMR 6252, CEA,ENSICAEN,CIMAP, F-14070 Caen 5, France

[2] Univ Autonoma Madrid, Dept Quim C9, E-28049 Madrid, Spain

[3] Univ Paris 06, CNRS, UMR 7590, IMPMC, F-75015 Paris, France

[4] Ecole Normale Super, Dept Chim, F-75005 Paris, France

[5] Univ Evry Val Essonne, CNRS, UMR 8587, LAMBE, F-91025 Evry, France

[6] Ecole Polytech Fed Lausanne, Inst Sci & Ingn Chim, BCH, CH-1015 Lausanne, Switzerland

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2009年 / 42卷 / 07期

关键词：

MOLECULE FRAGMENTATION; LIQUID; DYNAMICS; PHOTOIONIZATION; EXPLOSION; STATES;

D O I：

10.1088/0953-4075/42/7/075101

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We 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.

引用

页数：5

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