Ro‐vibrational Spectra of (para‐H2)N‐CH4 in He Droplets. Issue 22 (13th July 2016)

• Record Type: Journal Article
• Authors: Hoshina, Hiromichi; Sliter, Russell; Ravi, Aakash; Kuma, Susumu; Momose, Takamasa; Vilesov, Andrey F.
• Is Part Of: Chemphyschem. Volume 17:Issue 22(2016)
• Page Start: 3818
• Page End: 3825
• Publication Date: 2016-07-13
• Subjects: helium droplets -- infrared spectroscopy -- methane clusters -- para-hydrogen -- superfluid hydrogen; Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.201600484
• Languages: English
• ISSNs: 1439-4235

Abstract

Abstract: In this work, we report on the infrared spectroscopic study of clusters of CH4 molecules with up to N =80 para ‐hydrogen molecules assembled inside He droplets. Upon increase of the number of the added para ‐hydrogen molecules up to about N =12, both the rotational constant, B, and the origin frequency of the υ 3 band of CH4 decrease gradually. In the range of 6 ≤ N ≤12, the spectra indicate some abrupt changes of B and υ 3 with both values being approximately constant at N ≥12. The origin of this effect is discussed. Comparison of the spectra of methane molecules in para ‐hydrogen clusters to that in solid para ‐hydrogen is also presented. Abstract : In search of superfluid hydrogen : Methane molecule probes its para ‐hydrogen cluster surroundings in a helium droplet (see picture), deepening our understanding of this quantum system at cryogenic temperatures.