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

A. M. Ishkhanyan, V. P. Krainov

Division for Experimental Physics

Research output: Contribution to journal › Article

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

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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

Cite this

Ishkhanyan, A. M., & Krainov, V. P. (2018). Low-frequency electromagnetic radiation of hydrogen molecular gas: Effect of the ortho-para conversion. Journal of Physics B: Atomic, Molecular and Optical Physics, 51(23), [235401]. https://doi.org/10.1088/1361-6455/aae6ee

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KW - partition function

KW - spin flip

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Access to Document

10.1088/1361-6455/aae6ee