Triatomic Hydrogen
Welcome to the Triatomic Hydrogen Group at the Department of Molecular and Optical Physics - University of Freiburg, Germany

Coupling of Bound States to Continuum States in Neutral Triatomic Hydrogen
H. Helm, U. Galster, I. Mistrik, U. Müller, and R. Reichle
Department of Molecular and Optical Physics, Albert-Ludwigs-Universität, Hermann-Herder-Strasse 3, D-79104  Freiburg, Germany


Excited states of neutral H3 in the vicinity of the ionization threshold are resonances in the dissociative recombination (DR)process, H3+ + e -->H + H2 and H3+ + e --> H + H + H .Over the past twenty years a great amount of experimental data on the dynamics of excited neutral triatomic hydrogen has been collected.While access from excited states of H3 into the ionization continuum is now well understood in terms of multichannel quantum defect theory (MQDT),the competing access into the dissociative continua H + H2 and H + H + H has currently no firm theoretical explanation.This lack of understanding lies at the heart of our inability to predict and understand the very high rates observed for DR of H3+ at low electron energy.

©2003 in: Dissociative Recombination, ed. S. Guberman,
Kluwer Academic, Plenum Publishers, USA, 275-288 (2003)

Key words :DR,predissociation,autoionization
ISBN 0-306-47765-3
Contribution: H3+ Theory and Experiment --> 275(4)

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