Dissociative excitation processes of atomic state H(2p) in the H3+-He collision

Author: Malkhaz Gochitashvili
Co-authors: Ramaz Lomsadze, Nugzar Mosulishvili
Keywords: excitation, dissociation, Hydrogen molecule
Annotation:

We have presented results of experimental measurement of the excitation function of hydrogen atomic line L (= 121.6nm), which was emitted during of H3+-He collision.The H3+ ion beam leaving the Toneman type ion source. The radiation emitted as a result of the excitation of Hydrogen atom was observed at the right angle to the direction of the beam. The spectroscopic analysis of the emission was performed with a Seya-Namioka vacuum monochromator incorporating a toroidal diffraction grating. The used experimental device allows to carry out research of the excitation processes in various conditions of experiment. In particular, by changing the pressure of working gas - hydrogen in an ion source it was possible to vary relative fraction of the output of H+, H2+, H3+ ions depending on the value of pressure and to investigate influence of internal excitation degree of a molecule on efficiency of the process of Lα line excitation. The relatively high value of a current of H3+ ions was obtained, when pressure in the ionic source reached ~ 0.1 Torr. In this case, the H3+ ions with inappreciable internal energy was extracted from the source (In main in v = 0 vibrational state). In these conditions, vibrationally - excited ions H3+ participate in quenching collisions with molecules Н2.

Lecture files:

Dissociative excitation processes of atomic state H(2p) in the H3+-He collision [en]
H(2p) მდგომარეობის აგზნება H3+-He დაჯახების პროცესში [ka]