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|Title:||Excimers in the Lowest Rotational Quantum State in Liquid Helium|
|Authors:||Mendoza-Luna, L. G.|
Shiltagh, N. M. K.
Watkins, M. J.
von Haeften, Klaus
|Publisher:||American Chemical Society|
|Citation:||Journal of Physical Chemistry Letters, 2016|
|Abstract:||Evidence for helium excimers (He∗_2) in the lowest allowed rotational quantum state in liquid helium is presented. He∗_2 was generated by a corona discharge in the gas and normal liquid phases. Fluorescence spectra recorded in the visible region between 3.8 and 5.0 K and 0.2 and 5.6 bar showed the rotationally resolved d3 Σ+ u → b3 Πg transition of He∗_2. Analysis of the pressure and temperature dependence of lineshifts and line intensities showed features of solvated He∗_2 superimposed on its gas phase spectrum and, in the liquid phase only, pressure-induced rotational cooling. These findings suggest that He∗_2 can be used to investigate bulk helium in different phases at the nanoscale.|
|Rights:||Creative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: http://creativecommons.org/licenses/by-nc-nd/4.0/ Archived with reference to SHERPA/RoMEO and publisher website.|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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