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Production of intense beams of mass-selected water cluster ions and theoretical study of atom-water interactions
Zhiping P. Wang1, Phuong Mai Dinh1, P. -G. Reinhard, Eric Suraud1, G. Bruny2, C. Montano2, S. Feil2, S. Eden2, H. Abdoul-Carime2, B. Farizon2, M. Farizon2, S. Ouaskit2, T. D. Maerk

The influences of water molecules surrounding biological molecules during irradiation with heavy particles (atoms,ions) are currently a major subject in radiation science on a molecular level. In order to elucidate the underlying complex reaction mechanisms we have initiated a joint experimental and theoretical investigation with the aim to make direct comparisons between experimental and theoretical results. As a first step, studies of collisions of a water molecule with a neutral projectile (C atom) at high velocities (> 0.1 a.u.), and with a charged projectile (proton) at low velocities (< 0.1 a.u.) have been studied within the microscopic framework. In particular, time-dependent density functional theory (TDDFT) was applied to the valence electrons and coupled non-adiabatically to Molecular dynamics (MD) for ionic cores. Complementary experimental developments have been carried out to study projectile interactions with accelerated (< 10 keV) and mass-selected cluster ions. The first size distributions of protonated water cluster ions H+(H_2O)_n (n=2-39) produced using this new apparatus are presented.
1 :  LPT - Laboratoire de Physique Théorique - IRSAMC
2 :  IPNL - Institut de Physique Nucléaire de Lyon
Systèmes de Fermions Finis - Agrégats
Physique/Physique/Agrégats Moléculaires et Atomiques
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