Broadening of energy levels of Rydberg states with small orbital angular momenta in group IIb ions by ambient thermal radiation

2021 ◽  
Vol 51 (6) ◽  
pp. 511-517
Author(s):  
Igor Leonidovich Glukhov ◽  
Aleksandr Anatolievich Kamenski ◽  
V D Ovsiannikov
Keyword(s):  
Thermal Radiation ◽  
Energy Levels ◽  
Rydberg States ◽  
Angular Momenta

scholarly journals Scrambling of Rydberg states by thermal radiation

Nature ◽  
1979 ◽  
Vol 279 (5713) ◽  
pp. 476-476
Author(s):  
Peter Knight
Keyword(s):  
Thermal Radiation ◽  
Rydberg States

The spectroscopy of van der Waals molecules

1976 ◽  
Vol 54 (5) ◽  
pp. 487-504 ◽  
Author(s):  
George E. Ewing
Keyword(s):  
Energy Levels ◽  
Van Der Waals ◽  
Electronic Spectroscopy ◽  
Spectroscopic Constants ◽  
Intermolecular Potential ◽  
Interatomic Potentials ◽  
Strongly Coupled ◽  
Van Der Waals Molecules ◽  
Angular Momenta ◽  
Vibration Rotation

The recent spectroscopy of van der Waals molecules is reviewed. Examples are presented from radio-frequency, microwave, Raman, infrared, and electronic spectroscopy. Diatomic van der Waals molecules (e.g. Ne2, Ar2, Kr2, Mg2) reveal a manifold of closely spaced vibration–rotation levels consistent with the small dissociation energies which are orders of magnitude less than for ordinary chemically bonded molecules. The (isotropic) interatomic potentials which define these molecules may be evaluated from their energy levels. Polyatomic van der Waals molecules (e.g. H2–Ar, FCl–Ar, (H2)2, (O2)2, (CO2)2) are classified according to the strength of the (anisotropic) intermolecular potential which tends to define their geometry. This classification depends on the nature of the coupling of the rotational angular momenta and leads to a labeling of the complexes as free rotor, weakly coupled, strongly coupled, or semirigid. The spectroscopic constants which are determined from the energy levels of diatomic and polyatomic van der Waals molecules can be used to better understand the intermolecular bonding which holds these molecules together.

Spectral comparison of the gerade Rydberg states of Br2 with different angular momenta

1995 ◽  
Vol 102 (5) ◽  
pp. 2286-2287
Author(s):  
Pei‐nan Wang ◽  
Lei Xu ◽  
Ya‐fei Wang ◽  
Fu‐ming Li
Keyword(s):  
Rydberg States ◽  
Angular Momenta ◽  
Spectral Comparison

Rotational autoionization and energy levels of triplet nf, v=0 Rydberg states ofH2s

1997 ◽  
Vol 55 (2) ◽  
pp. 1056-1063 ◽  
Author(s):  
M. D. Lindsay ◽  
F. M. Pipkin
Keyword(s):  
Energy Levels ◽  
Rydberg States

Rydberg energy levels and quantum defects of B II, Ge II, Si II of subgroups III and IV

2020 ◽  
Vol 98 (3) ◽  
pp. 274-286
Author(s):  
Ejaz Ahmed ◽  
Salman Raza ◽  
M. Noman Hameed ◽  
Muhammad Farooq ◽  
Jehan Akbar
Keyword(s):  
Model Theory ◽  
Good Accuracy ◽  
Potential Model ◽  
Energy Levels ◽  
Rydberg States ◽  
Theoretical Computation ◽  
Quantum Defects ◽  
First Time ◽  
Bound Electron

Theoretical computations of Rydberg energy levels series and atomic lifetimes for singly ionized boron (B II), silicon (Si II), and germanium (Ge II) have been performed. In the theoretical computation weakest bound electron potential model theory (WBEPMT) is employed. Regularities of changes in quantum defects for the following Rydberg states series: 2sns (1S0), 2snp ([Formula: see text]), 2snf ([Formula: see text], [Formula: see text], [Formula: see text]), 2snf ([Formula: see text]) of B II; 3s2ns (2S1/2), 3s2nd (2D3/2,5/2), 3s2nf ([Formula: see text]), 3s2ng (2G7/2,9/2) of Si II; and 4s2nf ([Formula: see text]), 4s2nf ([Formula: see text]), 4s2ng (2G7/2,9/2) of Ge II, up to n = 50 are presented. The atomic lifetimes of the following series: 1s22sns (1S0), 1s22snp ([Formula: see text]), 1s22snd (1D2) of B II; 3s2ns (2S1/2), 3s2nf ([Formula: see text]) of Si II; and 4s2ns (2S1/2) of Ge II are predicted with good accuracy. Some high-lying Rydberg energy levels and atomic lifetimes have been presented for the first time. The series for which Rydberg energy levels are computed in this work are unperturbed series.

Infrared and Visible Emission Spectrum of the NO Molecule. The 2Δ–2Π Bands of the 3d–3p and 4d–3p Transitions between Rydberg Complexes

1971 ◽  
Vol 49 (1) ◽  
pp. 76-89 ◽  
Author(s):  
F. Ackermann
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Rydberg State ◽  
Energy Levels ◽  
Rydberg States ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rotational Analysis ◽  
Mixed States ◽  
Doublet Splitting

The two mutually related bands B′2Δ–C2Π (7,0) → N2Δ–C2Π (0,0) and N2Δ–C2Π (0,0) → B′2Δ–C2Π (7,0) are observed with high resolution between 6620 and 6520 Å in the emission spectrum of the NO molecule. They are the 2Δ–2Π part of the 4d–3p transitions between the two Rydberg states N2Δ(4dδ) and C2Π (3pπ) of the molecule. A rotational analysis is carried out for both bands, and the very close similarity of the structure of these bands with the structure of the corresponding 2Δ–2Π bands of the 3d–3p transitions, observed in the infrared, is demonstrated. The two upper levels in these nd–3p transitions represent examples of mixed states showing complete changeover with increasing rotation from the Rydberg type with no spin–orbit coupling (AR = 0.00 ± 0.05 cm−1) to an inverted valence type and vice versa. The behavior of the doublet splitting is studied with regard to this changeover. The lower levels of the Rydberg state C2Π also are mixtures with levels of a valence state. The mixing with B2Π (ν = 7) is comparatively small in the C2Π (ν = 0) level, but it strongly affects the energy levels with the lowest J values. The beginning of one of the two bands observed in the visible, therefore, forms the (7,7) band of the system B′2ΔB2Π. Constants of the states involved are determined.

Precise theory of the Stark effect on hydrogen- and helium-like atoms

2002 ◽  
Vol 80 (11) ◽  
pp. 1401-1412 ◽  
Author(s):  
V D Ovsiannikov ◽  
V G Pal'chikov
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Ground State ◽  
Stark Effect ◽  
Energy Levels ◽  
Relativistic Effects ◽  
Model Potential ◽  
Matrix Elements ◽  
Angular Momenta ◽  
Relativistic Coulomb

The relativistic effects on the dipole polarizabilities and hyperpolarizabilities are considered for different kinds of energy levels in hydrogen- and helium-like atoms. The relativistic Coulomb Green's function is used for calculating the susceptibilities of the ground-state hydrogen up to terms of order (α Z)10. Both relativistic and interelectronic corrections are determined for the ground state of helium. The formulas are given for polarizability and hyperpolarizability in the relativistic "screened-charge" approximation. The anticrossing of the triplet 3PJ states with zero magnetic quantum number is studied on the basis of perturbation theory for degenerate states. General expressions are given for the dipole matrix elements, up to the fourth order in field strength, within the basis of close fine-structure substates with equal angular momenta L and different total momenta J. The calculation of the higher order matrix elements is carried out with the use of the Green's function in the model potential approximation. PACS Nos.: 31.10Dk, 31.15Ar, 31.30Jv, 32.10-f, 31.25Eb

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