Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: S1.00097 : Dynamics of endohedral hydrogen in C$_{60}$: Infrared study
Author:
Infrared spectra of endohedral hydrogen isotopomers H$_2$,
D$_2$, and HD were measured in the temperature range from 6 to
300\,K.
A model of a vibrating rotor in a spherical potential together
with the translational motion induced dipole moment theory was
used to explain the positions and intensities of IR absorption lines.
By measuring spectra of a {\it para\/} enriched sample of
H$_2$@C$_{60}$, we confirmed the assignment of lines to {\it
ortho\/}- and {\it para\/}-H$_2$.
Inside C$_{60}$ cage the rotation of hydrogen is unhindered and
the translation is quantized and coupled to the rotation.
The isotropic and translation-rotation coupling part of the
potential are anharmonic and depend on the vibrational states of
hydrogen.
The analysis of the isotopic effect on the IR transition
intensities and interaction potential in the C$_{60}$ cage is
presented.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.S1.97
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