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

A. M. Ishkhanyan, V. P. Krainov

Research output: Contribution to journalArticle

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 languageEnglish
Article number235401
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume51
Issue number23
DOIs
Publication statusPublished - 13 Nov 2018

Fingerprint

ortho para conversion
molecular gases
electromagnetic radiation
low frequencies
hydrogen
molecules
radiation
diatomic molecules
magnetic dipoles
hydrogen atoms
specific heat
room temperature
wavelengths
energy

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

Low-frequency electromagnetic radiation of hydrogen molecular gas : Effect of the ortho-para conversion. / Ishkhanyan, A. M.; Krainov, V. P.

In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 51, No. 23, 235401, 13.11.2018.

Research output: Contribution to journalArticle

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