Complete quantum electrodynamic α6m correction to energy levels of light atoms

2019 ◽  
Vol 100 (4) ◽  
Author(s):  
Vojtěch Patkóš ◽  
Vladimir A. Yerokhin ◽  
Krzysztof Pachucki
Keyword(s):  
Quantum Electrodynamic ◽  
Energy Levels ◽  
Light Atoms ◽  
Complete Quantum

scholarly journals Non-adiabatic effects in the H 3 + spectrum

2019 ◽  
Vol 377 (2154) ◽  
pp. 20180411 ◽  
Author(s):  
Paulo H. R. Amaral ◽  
Monika Stanke ◽  
Ludwik Adamowicz ◽  
Leonardo G. Diniz ◽  
José R. Mohallem ◽  
...  
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Quantum Electrodynamic ◽  
Energy Surface ◽  
Energy Levels ◽  
High Accuracy ◽  
Empirical Method ◽  
Molecular Ions ◽  
Stockholder Atoms ◽  
Existing Data

The effect of non-adiabatic coupling on the computed rovibrational energy levels amounts to about 2 cm −1 for H 3 + and must be included in high-accuracy calculations. Different strategies to obtain the corresponding energy shifts are reviewed in the article. A promising way is to introduce effective vibrational reduced masses that depend on the nuclear configuration. A new empirical method that uses the stockholder atoms-in-molecules approach to this effect is presented and applied to H 3 + . Furthermore, a highly accurate potential energy surface for the D 3 + isotopologue, which includes relativistic and leading quantum electrodynamic terms, is constructed and used to analyse the observed rovibrational frequencies for this molecule. Accurate band origins are obtained that improve existing data. This article is part of a discussion meeting issue ‘Advances in hydrogen molecular ions: H 3 + , H 5 + and beyond’.

Quantum Electrodynamic Shifts of Rydberg Energy Levels between Parallel Metal Plates

1998 ◽  
Vol 81 (26) ◽  
pp. 5784-5787 ◽  
Author(s):  
M. Marrocco ◽  
M. Weidinger ◽  
R. T. Sang ◽  
H. Walther
Keyword(s):  
Quantum Electrodynamic ◽  
Energy Levels ◽  
Metal Plates

scholarly journals Energy levels, wavelengths, transition probabilities, and line strengths of Si-like Se ions

2019 ◽  
Vol 97 (7) ◽  
pp. 791-796
Author(s):  
Miao Wu ◽  
Lianlian Sun ◽  
Xiangfu Li ◽  
Ji Zhang
Keyword(s):  
Quantum Electrodynamic ◽  
Transition Probabilities ◽  
Theoretical Calculations ◽  
Energy Levels ◽  
Active Space ◽  
Hartree Fock ◽  
Experimental Values ◽  
Space Approach ◽  
Good Agreement ◽  
Line Strengths

The multi-configuration Dirac–Hartree–Fock (MCDHF) method and the active space approach have been employed to investigate the energy levels, wavelengths, transition probabilities, and line strengths of Si-like Se ions. The contributions of Breit interaction (BI) and quantum electrodynamic (QED) correction are taken into consideration. The wavelengths, transition probabilities, and line strengths of Si-like Se ions have also been calculated. Compared with other theoretical and experimental values of these parameters, our values are in good agreement with others, and the number of energy levels we considered is larger than that of any other theoretical calculations.

Testing of QED theory on the Rydberg series for the He-like multicharged ions

2002 ◽  
Vol 80 (11) ◽  
pp. 1255-1261 ◽  
Author(s):  
V G Pal'chikov ◽  
I Yu. Skobelev ◽  
A Ya. Faenov
Keyword(s):  
Quantum Electrodynamic ◽  
Ground State ◽  
Energy Levels ◽  
Rydberg States ◽  
Expansion Method ◽  
Isoelectronic Sequence ◽  
Rydberg Series ◽  
Ionization Energies ◽  
Relativistic Corrections ◽  
Bound Electrons

The paper examines the 1/Z expansion method in calculating the energy levels, ionization energies, and wavelengths of the resonant Rydberg states 1snp 1P1 for atoms belonging to the helium isoelectronic sequence. The interactions of the bound electrons are treated as a perturbation that results in the electron–electron Breit interaction, relativistic corrections, and quantum electrodynamic (QED) contributions. By comparing the calculated wavelengths with a number of observed wavelengths, the QED contributions to the ground state are analyzed. PACS Nos.: 31.20Di, 31.20Tz, 31.30Jv, 31.50+W

A Perturbation Theory for the Population of Atomic Energy Levels in Non-Lte Plasmas

1988 ◽  
Vol 102 ◽  
pp. 343-347
Author(s):  
M. Klapisch
Keyword(s):  
Perturbation Theory ◽  
Small Parameter ◽  
Classification Scheme ◽  
Sum Rules ◽  
Energy Levels ◽  
Natural Classification ◽  
Quantum Numbers ◽  
Formal Expansion ◽  
Atomic Energy Levels ◽  
As Effects

AbstractA formal expansion of the CRM in powers of a small parameter is presented. The terms of the expansion are products of matrices. Inverses are interpreted as effects of cascades.It will be shown that this allows for the separation of the different contributions to the populations, thus providing a natural classification scheme for processes involving atoms in plasmas. Sum rules can be formulated, allowing the population of the levels, in some simple cases, to be related in a transparent way to the quantum numbers.

Low-lying energy levels of the FeH molecule

1999 ◽  
Vol 97 (1) ◽  
pp. 93-103 ◽  
Author(s):  
DANIEL F. HULLAH, RICHARD F. BARROW, JOHN
Keyword(s):  
Energy Levels
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