Modified quantum defect theory: application to analysis of high-resolution Fourier transform spectra of neutral oxygen

The quantum defect theory (QDT) has been successfully used to describe processes involving high-excited (Rydberg) states of atoms and molecules with a single valence electron over closed shells. This study proposes a modification of QDT to describe the low-energy excited states of a more complex ato...

Full description

Saved in:
Bibliographic Details
Published inThe European physical journal. D, Atomic, molecular, and optical physics Vol. 78; no. 4
Main Authors Chernov, Vladislav E., Civiš, Svatopluk, Manakov, Nikolai L., Naskidashvili, Alexander V., Zetkina, Alena I., Zanozina, Ekaterina M., Ferus, Martin, Kubelík, Petr, Zetkina, Oxana V.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.04.2024
Springer Nature B.V
Subjects
Applications of Nonlinear Dynamics and Chaos Theory
Atomic
Defects
Dipole moments
Electron states
Fourier transforms
High resolution
Infrared spectroscopy
Mathematical analysis
Molecular
Optical and Plasma Physics
Oxygen spectra
Physical Chemistry
Physics
Physics and Astronomy
Quantum Information Technology
Quantum Physics
Regular Article - Atomic Physics
Spectroscopy/Spectrometry
Spintronics
Transition probabilities
Wave functions
Online AccessGet full text

Cover

More Information
Summary:The quantum defect theory (QDT) has been successfully used to describe processes involving high-excited (Rydberg) states of atoms and molecules with a single valence electron over closed shells. This study proposes a modification of QDT to describe the low-energy excited states of a more complex atom (oxygen) which are responsible for its infrared (IR) spectrum. The radial wavefunctions of low-excited electron states include the quantum defect dependence on energy which is derived from the whole spectral series, in contrast to the highly excited Rydberg levels, whose quantum defects are determined by the individual level energies. Our method was applied to calculate the transition probabilities in the neutral oxygen spectra in discharge plasma measured using high-resolution time-resolved IR Fourier transform spectroscopy. The Boltzmann plots resulting from the experimental spectra prove that the modified QDT approach is an adequate method for calculating atomic dipole transition moments. Graphical abstract
ISSN:1434-6060
1434-6079
DOI:10.1140/epjd/s10053-024-00837-3