ν4 Band of CH4 in helium nanodroplets: A probe of the dynamical response of a superfluid

Aakash Ravi; Susumu Kuma; Christopher Yearwood; Birinder Kahlon; Majd Mustafa; Watheq Al-Basheer; Katsunari Enomoto; Takamasa Momose

doi:10.1103/PhysRevA.84.020502

ν₄ Band of CH₄ in helium nanodroplets: A probe of the dynamical response of a superfluid

Aakash Ravi^*
, Susumu Kuma
, Christopher Yearwood
, Birinder Kahlon
, Majd Mustafa
, Watheq Al-Basheer
, Katsunari Enomoto
, Takamasa Momose

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

The triply degenerate ν₄ bending mode of methane in superfluid helium nanodroplets was observed at 7.7 μm by high-resolution infrared depletion spectroscopy. Five rotational transitions were detected, with a minimum linewidth of only 65 MHz. The observed lines showed slightly asymmetric line shapes, especially in the case of the P(2) and R(1) rotational lines. Analysis of the line shape indicates that the superfluid environment has a finite response time of a few nanoseconds to equilibrate upon rotational excitation of CH₄.

Original language	English
Article number	020502
Journal	Physical Review A
Volume	84
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.84.020502
State	Published - 26 Aug 2011
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Access to Document

10.1103/PhysRevA.84.020502

Cite this

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title = "ν4 Band of CH4 in helium nanodroplets: A probe of the dynamical response of a superfluid",

abstract = "The triply degenerate ν4 bending mode of methane in superfluid helium nanodroplets was observed at 7.7 μm by high-resolution infrared depletion spectroscopy. Five rotational transitions were detected, with a minimum linewidth of only 65 MHz. The observed lines showed slightly asymmetric line shapes, especially in the case of the P(2) and R(1) rotational lines. Analysis of the line shape indicates that the superfluid environment has a finite response time of a few nanoseconds to equilibrate upon rotational excitation of CH4.",

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T2 - A probe of the dynamical response of a superfluid

AU - Ravi, Aakash

AU - Kuma, Susumu

AU - Yearwood, Christopher

AU - Kahlon, Birinder

AU - Mustafa, Majd

AU - Al-Basheer, Watheq

AU - Enomoto, Katsunari

AU - Momose, Takamasa

PY - 2011/8/26

Y1 - 2011/8/26

N2 - The triply degenerate ν4 bending mode of methane in superfluid helium nanodroplets was observed at 7.7 μm by high-resolution infrared depletion spectroscopy. Five rotational transitions were detected, with a minimum linewidth of only 65 MHz. The observed lines showed slightly asymmetric line shapes, especially in the case of the P(2) and R(1) rotational lines. Analysis of the line shape indicates that the superfluid environment has a finite response time of a few nanoseconds to equilibrate upon rotational excitation of CH4.

AB - The triply degenerate ν4 bending mode of methane in superfluid helium nanodroplets was observed at 7.7 μm by high-resolution infrared depletion spectroscopy. Five rotational transitions were detected, with a minimum linewidth of only 65 MHz. The observed lines showed slightly asymmetric line shapes, especially in the case of the P(2) and R(1) rotational lines. Analysis of the line shape indicates that the superfluid environment has a finite response time of a few nanoseconds to equilibrate upon rotational excitation of CH4.

UR - https://www.scopus.com/pages/publications/80052293749

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DO - 10.1103/PhysRevA.84.020502

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