The role of asymptotic states in H 3 +. Jonathan Tennyson Department of Physics and Astronomy Royal Society University College London Jan 2006. HPCx supercomputer: Daresbury Laboratory. Spectroscopy of H 3 +.
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The role of asymptotic states in H3+
Department of Physics and Astronomy Royal Society
University College London Jan 2006
Meilke et al, Phys. Rev. Lett. 91, 063201 (2003)
“Solved problem” at low energy
How about near dissociation?
Realistic potential energy surface:
Polyansky et al, Mol. Phys., 98, 261 (2000).
Calculated rotational constants for H3+
JJ Munro, J Ramanlal & J Tennyson, New J Phys, 7, 196 (2005)
at 19600 cm-1
Poincare surface of
D0 > E > De
CO2 laser: 800 – 1000 cm-1
H3+ + hn H2 + H+
Near-dissociation photodissociation experiment
of Carrington et al
Quantum states at dissociation:
Near dissociation spectrum of H3+ by Carrington et al
25000+ discrete lines in 222 cm-1
for F0 dropping bound solutions;
i U(R) is complex absorbing potential (CAP).
3. Vary l to identify resonances in complex plane.
Complex Absorbing Potential (CAP) comparison
Locating resonances using a CAP
Width (G) > 1 cm-1
Too short lived to be important for photodissociation spectrum
Asymptotic Vibrational States (AVS)