On the ambiguity of the intermolecular interaction potential determined from spectroscopic data

Abstract

It was shown that the interaction potential for NH₃-Ar and NH₃-He systems is determined ambiguously from experimentally measured broadening coefficients γ of NH₃ absorption lines. Different sets of model interaction potentials, given the same calculation accuracy of the coefficients of broadening by pressure of these gases at room temperature, determine these coefficients for other temperatures in different ways. This difference is the most pronounced for NH₃ lines in a NH₃-He mixture. For NH₃ lines in a NH₃-Ar mixture, this difference becomes apparent for lines with small rotational quantum numbers K; this effect weakens for K → J.

Original language	English
Pages (from-to)	222-229
Number of pages	8
Journal	Atmospheric and Oceanic Optics
Volume	27
Issue number	3
DOIs	https://doi.org/10.1134/S1024856014030099
Publication status	Published - 1 May 2014

ASJC Scopus subject areas

Oceanography
Atomic and Molecular Physics, and Optics
Earth-Surface Processes
Atmospheric Science

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title = "On the ambiguity of the intermolecular interaction potential determined from spectroscopic data",

abstract = "It was shown that the interaction potential for NH3-Ar and NH3-He systems is determined ambiguously from experimentally measured broadening coefficients γ of NH3 absorption lines. Different sets of model interaction potentials, given the same calculation accuracy of the coefficients of broadening by pressure of these gases at room temperature, determine these coefficients for other temperatures in different ways. This difference is the most pronounced for NH3 lines in a NH3-He mixture. For NH3 lines in a NH3-Ar mixture, this difference becomes apparent for lines with small rotational quantum numbers K; this effect weakens for K → J.",

author = "Starikov, {V. I.}",

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N2 - It was shown that the interaction potential for NH3-Ar and NH3-He systems is determined ambiguously from experimentally measured broadening coefficients γ of NH3 absorption lines. Different sets of model interaction potentials, given the same calculation accuracy of the coefficients of broadening by pressure of these gases at room temperature, determine these coefficients for other temperatures in different ways. This difference is the most pronounced for NH3 lines in a NH3-He mixture. For NH3 lines in a NH3-Ar mixture, this difference becomes apparent for lines with small rotational quantum numbers K; this effect weakens for K → J.

AB - It was shown that the interaction potential for NH3-Ar and NH3-He systems is determined ambiguously from experimentally measured broadening coefficients γ of NH3 absorption lines. Different sets of model interaction potentials, given the same calculation accuracy of the coefficients of broadening by pressure of these gases at room temperature, determine these coefficients for other temperatures in different ways. This difference is the most pronounced for NH3 lines in a NH3-He mixture. For NH3 lines in a NH3-Ar mixture, this difference becomes apparent for lines with small rotational quantum numbers K; this effect weakens for K → J.

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