Low-frequency electromagnetic radiation of hydrogen molecular gas: Effect of the ortho-para conversion

Abstract

We calculate the rate of the spontaneous magnetic dipole radiation transitions from ortho-to para-states of the hydrogen molecule at room temperature with radiation wavelengths of about 0.01-0.1 cm. Exponentially small differences between the rotational energies and heat capacities of parahydrogen, orthohydrogen molecules and diatomic molecules consisting of different hydrogen atoms for high temperatures are derived.

Original language	English
Article number	235401
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Volume	51
Issue number	23
DOIs	https://doi.org/10.1088/1361-6455/aae6ee
Publication status	Published - 13 Nov 2018

Keywords

magnetic dipole transitions
orthohydrogen molecule
parahydrogen molecule
partition function
spin flip

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1088/1361-6455/aae6ee

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title = "Low-frequency electromagnetic radiation of hydrogen molecular gas: Effect of the ortho-para conversion",

abstract = "We calculate the rate of the spontaneous magnetic dipole radiation transitions from ortho-to para-states of the hydrogen molecule at room temperature with radiation wavelengths of about 0.01-0.1 cm. Exponentially small differences between the rotational energies and heat capacities of parahydrogen, orthohydrogen molecules and diatomic molecules consisting of different hydrogen atoms for high temperatures are derived.",

keywords = "magnetic dipole transitions, orthohydrogen molecule, parahydrogen molecule, partition function, spin flip",

author = "Ishkhanyan, {A. M.} and Krainov, {V. P.}",

year = "2018",

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day = "13",

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AU - Krainov, V. P.

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Y1 - 2018/11/13

N2 - We calculate the rate of the spontaneous magnetic dipole radiation transitions from ortho-to para-states of the hydrogen molecule at room temperature with radiation wavelengths of about 0.01-0.1 cm. Exponentially small differences between the rotational energies and heat capacities of parahydrogen, orthohydrogen molecules and diatomic molecules consisting of different hydrogen atoms for high temperatures are derived.

AB - We calculate the rate of the spontaneous magnetic dipole radiation transitions from ortho-to para-states of the hydrogen molecule at room temperature with radiation wavelengths of about 0.01-0.1 cm. Exponentially small differences between the rotational energies and heat capacities of parahydrogen, orthohydrogen molecules and diatomic molecules consisting of different hydrogen atoms for high temperatures are derived.

KW - magnetic dipole transitions

KW - orthohydrogen molecule

KW - parahydrogen molecule

KW - partition function

KW - spin flip

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