Model Potential Calculations of Oscillator Strength Spectra of Rydberg Li Atoms in External Fields

Meng, Hao; Shi, Tao

doi:10.1088/0253-6102/52/2/28

Cited by 4 publications

(1 citation statement)

References 45 publications

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“…In this case, the term V r is usually expressed by model potential, parameterized by some angular momentum-dependent variables which are closely correlated with quantum defects. Rather than using the model potential V r [33] or the R-matrix method including the quantum defects implicitly [34], we employ an equivalent form for the central field potential:…”

Section: Theoretical Calculationmentioning

confidence: 99%

Core effect on the diamagnetic spectrum of barium Rydberg states

et al. 2012

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We study the core effect of nonhydrogenic alkaline-earth-metal barium in its diamagnetic spectrum by one photon transition from the ground state 6s 2 1 S 0 experimentally and theoretically. The non-Coulombic potential of the ion core introduces an extra energy shift compared with hydrogen and a level anticrossing between different n manifolds, characterized by the quantum defect of the concerned angular momentum states. With a complex rotation coordinate technique and a B-spline expansion method, we develop a matrix-form Hamiltonian based on an effective potential incorporating the angular-dependent quantum defect into the angular rotation term. The nonhydrogen core effects are investigated by sweeping the quantum defects of different channels in the calculation. Results show that quantum defects of p and f states have a undeniable effect on the intensities and positions of the spectral lines, although barium is closely hydrogenlike in the energy range examined. The anticrossing spectral lines are also identified with the aid of theoretical calculations. The calculations are in good agreement with the experimental observations.

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Section: Theoretical Calculationmentioning

confidence: 99%

Core effect on the diamagnetic spectrum of barium Rydberg states

et al. 2012

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Hyperpolarizabilities of alkaline-earth metal ions Be+, Mg+, and Ca+

Yin

Zhang

et al. 2016

Sci. China Phys. Mech. Astron.

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Non-linear spectral splitting of Rydberg sodium in external fields

Gao¹,

Yang²,

Cai³

et al. 2015

Chinese Phys. B

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We have studied highly excited sodium in various electric fields, parallel electric and magnetic fields, with one σ and π photon irradiation, and even in a magnetic field with a complex laser polarization configuration. The σ spectra shows a simple linear Stark effect with the applied electric field, while the π spectra exhibits a strong non-linear dependence on the electric field. The π transitions in parallel fields show a similar behavior to that in a pure electric field but the spectra get more smooth due to the magnetic field. The diamagnetic spectrum with laser polarization angles between 0 and π/2 proves that it can be reproduced by simple linear combination of π and σ components, indicating there is no interference between the π and σ channels. A full quantum calculation considering the quantum defects accounts for all the observations. The quantum defects, especially for the channel np, play an important role in the spectral profile.

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Model Potential Calculations of Oscillator Strength Spectra of Rydberg Li Atoms in External Fields

Cited by 4 publications

References 45 publications

Core effect on the diamagnetic spectrum of barium Rydberg states

Core effect on the diamagnetic spectrum of barium Rydberg states

Hyperpolarizabilities of alkaline-earth metal ions Be+, Mg+, and Ca+

Non-linear spectral splitting of Rydberg sodium in external fields

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