Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..confefb02s&link_type=abstract
"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec
Physics
Matrix/Condensed Phase
Scientific paper
Vibrational spectra of para-H_2 molecules in clusters consisting of para-H_2 or para-H_2/D_2 seeded in He have been obtained using coherent anti-Stokes Raman spectroscopy. The Q_1(0) line of para-H_2, obtained upon expansion of neat para-H_2/D_2, exhibits a high frequency vibrational shift of about 2.6 wn with change of D_2 concentration from 0 to 98%. This shift is assigned to a decrease of the para-H_2 vibron band width in mixed clusters, similar to that previously observed in bulk H_2/D_2 solid. 1% para-H_2/D_2 clusters in He are liquid and show a much smaller shift of about 0.5 wn and indicate phase separation into a predominantly D_2 core and H_2 shell. The onset of phase separation in para-H_2/D_2 mixtures is predicted at approximately 3 K providing further evidence of super-cooled liquid hydrogen clusters previously studied.
Sliter Russell
Vilesov, Andrey Aa(Department Of Chemistry, University Of Sou Los Angeles Ca 90089) F.
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