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Coupling of Bound States to Continuum States in Neutral Triatomic Hydrogen

  • H. Helm
  • U. Galster
  • I. Mistrík
  • U. Müller
  • R. Reichle

Abstract

Rydberg states of the neutral triatomic hydrogen molecule can be viewed as an electron attached to a tightly bound H 3 + core.1–4 These states are embedded in the dissociation continuum of the repulsive electronic ground state surface as seen from Fig. 1. As a consequence, all excited bound states of H3 are subject to predissociation. The metastable 2pA2″(N=K=0) state is a notable exception. Here N refers to the total angular momentum apart from spin and K to the projection of N on the molecular top axis. This lowest rotational level is long-lived (700 ns)5 owing to symmetry forbidden coupling with the electronic ground state by either radiation or predissociation. Neutral H3 in this rotational level can be selectively prepared in a fast beam by charge exchange techniques. This state has been used as a platform for laser-excitation experiments3–14 to explore the structure and dynamics of highly excited states of H3.

Keywords

Potential Energy Surface Rydberg State Dalitz Plot Dissociative Recombination Rydberg Electron 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2003

Authors and Affiliations

  • H. Helm
    • 1
  • U. Galster
    • 1
  • I. Mistrík
    • 1
  • U. Müller
    • 1
  • R. Reichle
    • 1
  1. 1.Department of Molecular and Optical PhysicsUniversität Freiburg, Fakultät für PhysikFreiburgGermany

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