Anisotropic proton emission after fragmentation of H2O by multiply charged ions - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physics B: Atomic, Molecular and Optical Physics Année : 2006

Anisotropic proton emission after fragmentation of H2O by multiply charged ions

Résumé

Ion-induced fragmentation of H2O molecules was investigated experimentally by 3He^2+ impact as a function of the energy in the range from 1 to 5 keV, as well as a function of the charge state of 20 keV 20Ne^q+ projectiles (q = 3 and 7). The fragments were detected in the angular range from 25° to 135° with respect to the incident beam direction. Particular emphasis is given to protons originating from collisions at large impact parameters involving a Coulomb explosion mechanism. Absolute cross sections dσ/dΩ, differential in the emission angle, are found to be anisotropic. Protons are preferentially emitted at angles near 90°, with cross sections being ~50% larger than those at forward and backward angles. Possible mechanisms causing anisotropic emission of protons from fragmenting H2O are discussed.

Dates et versions

hal-01220208 , version 1 (25-10-2015)

Identifiants

Citer

Przemyslaw Sobocinski, Zoran D Pešić, Rolf Hellhammer, David Klein, Béla Sulik, et al.. Anisotropic proton emission after fragmentation of H2O by multiply charged ions. Journal of Physics B: Atomic, Molecular and Optical Physics, 2006, 39 (4), pp.927. ⟨10.1088/0953-4075/39/4/016⟩. ⟨hal-01220208⟩
232 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More