Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session N01: Poster Session II (4:00pm-6:00pm, PT)
4:00 PM,
Wednesday, June 7, 2023
Room: Exhibit Hall C
Abstract: N01.00010 : Resolving High Order Tensor Interactions in C60 Fullerenes*
Presenter:
Dina Rosenberg
(University of Colorado, Boulder)
Authors:
Dina Rosenberg
(University of Colorado, Boulder)
Lee R Liu
(JILA)
Jun Ye
(CU Boulder)
Bryan Changala
(Center for Astrophysics, Harvard & Smithsonian)
David J Nesbitt
(University of Colorado, Boulder)
Timur V Tscherbul
(University of Nevada, Reno)
We present an experimental rovibrational spectrum of gas phase C60 fullerene, obtained by QCL (Qunatum Cascade Laser) cavity enhanced absorption spectroscopy. The highly symmetrical icosahedral structure of C60 enables the observation of individual rovibrational transitions.
In the first work on C60 from our group [1], the rovibrational spectrum showed a striking difference between the R branch (rotational transitions that result from rotational excitation) and the P branch (transitions resulting from rotational relaxation). While the first obeyed a semi rigid-rotor structure throughout the spectrum (up to J~330), the latter demonstrated a splitting pattern, where single transitions were seemingly separated to low intensity, congested absorption lines. Comprehensive analysis of this P branch spectrum strongly suggests that these splitting patterns result from intramolecular vibrational interactions via the rotational rank 6 and rank 10 tensors. The high precision and very high SNR in this experiment have provided a uniquely detailed spectrum, and consequently better comprehension of the complexities in C60.
[1] P. B. Changala, M. L. Weichman, K. F. Lee, M. E. Fermann, and J. Ye, Science (1979) 363, 49 (2019).
*JILA, National Institute of Standards and Technology and University of Colorado
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