English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Communication: Observation of local-bender eigenstates in acetylene.

MPS-Authors
/persons/resource/persons182890

Park,  B.
Department of Dynamics at Surfaces, MPI for Biophysical Chemistry, Max Planck Society;

Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Steeves, A. H., Park, B., Bechtel, H. A., Baraban, J. H., & Field, R. W. (2015). Communication: Observation of local-bender eigenstates in acetylene. Journal of Chemical Physics, 143(7): 071101. doi:10.1063/1.4928638.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0028-5B32-3
Abstract
We report the observation of eigenstates that embody large-amplitude, local-bending vibrational motion in acetylene by stimulated emission pumping spectroscopy via vibrational levels of the S-1 state involving excitation in the non-totally symmetric bending modes. The N-b = 14 level, lying at 8971.69 cm(-1) (J = 0), is assigned on the basis of degeneracy due to dynamical symmetry breaking in the local-mode limit. The level pattern for the N-b = 16 level, lying at 10218.9 cm(-1), is consistent with expectations for increased separation of l = 0 and 2 vibrational angular momentum components. Increasingly poor agreement between our observations and the predicted positions of these levels highlights the failure of currently available normal mode effective Hamiltonian models to extrapolate to regions of the potential energy surface involving large-amplitude displacement along the acetylene reversible arrow vinylidene isomerization coordinate.