The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform
Zhi-wen Wang - One of the best experts on this subject based on the ideXlab platform.
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Total atomic scattering factors for the ground states of the lithium Isoelectronic Sequence from Na8+ to Ca17+.
The Journal of chemical physics, 2005Co-Authors: Chao Chen, Zhi-wen WangAbstract:In this work, total atomic scattering factors for the ground states of the lithium Isoelectronic Sequence are calculated by using the full core plus correlation wave function. For the ground state of the lithium atom, our results are compared with the previous theoretical values in the literature; the influence of electron correlation on total atomic scattering factors is analyzed systematically and our results agree with previous configuration interaction calculations very well. For the ground states of the lithium Isoelectronic Sequence from Na8+ to Ca17+, the general functional behavior of total atomic scattering factors is analyzed together for each state of the Isoelectronic Sequence.
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Term values of states for the lithium Isoelectronic Sequence
Journal of Physics B: Atomic Molecular and Optical Physics, 1998Co-Authors: Zhi-wen WangAbstract:The nonrelativistic energies of the core-excited (n = 3, 4, 5 and 6) states for the lithium Isoelectronic Sequence from Li I to O VI are calculated with a full core plus correlation method using multiconfiguration wavefunctions. Relativistic and mass-polarization effects on the energy are evaluated at the first-order perturbation theory by using the Pauli-Breit operators. Our results are in close agreement with experiment and are better than other theoretical results.
William L. Rowan - One of the best experts on this subject based on the ideXlab platform.
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Rh i Isoelectronic Sequence observed from Er 23+ to Pt 33+
Journal of the Optical Society of America B, 1993Co-Authors: Jack Sugar, Victor Kaufman, William L. RowanAbstract:The TEXT tokamak was used to obtain spectra of highly ionized Er, Yb, Hf, W, and Pt. Injection of these elements into the plasma was achieved by laser ablation of thin films of metal deposited on glass slides and mounted at the inner wall of the vessel. The spectra were photographed with a 2.2-m grazing-incidence spectrograph set at a grazing angle of 4°. These spectra occur in a very small wavelength interval, for example, ~2 A at 50 A in W In this spectral range we previously classified lines of the Ag and Pd Isoelectronic Sequences. We have now classified lines of the Rh Isoelectronic Sequence 4d9–4d84f, which accounts for the remaining strong lines in this dense but well-resolved group. No lines of this array have previously been identified. They were classified by comparison of observed and calculated transition energies along the Isoelectronic Sequence.
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rh i Isoelectronic Sequence observed from er 23 to pt 33
Journal of The Optical Society of America B-optical Physics, 1993Co-Authors: Jack Sugar, Victor Kaufman, William L. RowanAbstract:The TEXT tokamak was used to obtain spectra of highly ionized Er, Yb, Hf, W, and Pt. Injection of these elements into the plasma was achieved by laser ablation of thin films of metal deposited on glass slides and mounted at the inner wall of the vessel. The spectra were photographed with a 2.2-m grazing-incidence spectrograph set at a grazing angle of 4°. These spectra occur in a very small wavelength interval, for example, ~2 A at 50 A in W In this spectral range we previously classified lines of the Ag and Pd Isoelectronic Sequences. We have now classified lines of the Rh Isoelectronic Sequence 4d9–4d84f, which accounts for the remaining strong lines in this dense but well-resolved group. No lines of this array have previously been identified. They were classified by comparison of observed and calculated transition energies along the Isoelectronic Sequence.
Jacek Migdalek - One of the best experts on this subject based on the ideXlab platform.
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Relativistic effects in E1 transition oscillator strengths along the Yb+ Isoelectronic Sequence
Journal of Physics B: Atomic Molecular and Optical Physics, 2014Co-Authors: Jacek Migdalek, W SiegelAbstract:Electric dipole transition oscillator strengths have been computed for low-lying transitions in the Yb+ Isoelectronic Sequence (through Ra19 +) in fully relativistic and non-relativistic-limit approximations. Relativistic effects were carefully investigated and efforts were undertaken to establish systematic trends in relativistic contributions to oscillator strengths along the Yb+ Isoelectronic Sequence.
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‘Dirac–Fock + core-polarization’ calculations of E1 transitions in the francium Isoelectronic Sequence
Journal of Physics B, 2007Co-Authors: Jacek Migdalek, Agnieszka Glowacz-proszkiewiczAbstract:Some E1 transitions in the francium Isoelectronic Sequence are computed in the 'Dirac–Fock + core-polarization' approximation, where core–valence electron correlation is treated in a semiclassical core-polarization picture. The obtained ionization energies and oscillator strengths are tested versus very accurate many-body perturbation treatment (MBPT) theoretical results published recently as well as versus available experimental data. The role of core–valence correlation (core polarization) is carefully studied for both ionization energies and oscillator strengths along the spectral series and Isoelectronic Sequence. Profound anomalies in oscillator strength fine structure components for the principal series of neutral francium are predicted and await experimental confirmation.
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The spin-allowed and spin-forbidden - , transitions in the magnesium Isoelectronic Sequence
Journal of Physics B: Atomic Molecular and Optical Physics, 1996Co-Authors: M. Stanek, Leszek Głowacki, Jacek MigdalekAbstract:Relativistic multiconfiguration Dirac - Fock (MCDF) transition energies and oscillator strengths are determined in an `optimal level' scheme for both the spin-allowed - and spin-forbidden 3 - transitions in the magnesium Isoelectronic Sequence through . The modest relativistic configuration mixing to represent the intravalence correlation is combined in MCDF calculations with a polarization model to account for valence - core electron correlation. For the first few members of the Sequence (Mg I to Cl VI) rather extensive relativistic configuration interaction Dirac - Fock (CIDF) calculations (with and without core polarization) are also performed to improve the representation of the intravalence electron correlation which is important for the neutral end of the Sequence. The influence of the intravalence correlation, as well as the valence - core electron correlation on oscillator strengths, excitation energies and ionization energies is investigated. The proper representation of the intravalence electron correlation is found to be crucial for oscillator strength calculations near the neutral end of the magnesium Isoelectronic Sequence. For some elements of the Sequence the present data are the only ones available.
Jack Sugar - One of the best experts on this subject based on the ideXlab platform.
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Rh i Isoelectronic Sequence observed from Er 23+ to Pt 33+
Journal of the Optical Society of America B, 1993Co-Authors: Jack Sugar, Victor Kaufman, William L. RowanAbstract:The TEXT tokamak was used to obtain spectra of highly ionized Er, Yb, Hf, W, and Pt. Injection of these elements into the plasma was achieved by laser ablation of thin films of metal deposited on glass slides and mounted at the inner wall of the vessel. The spectra were photographed with a 2.2-m grazing-incidence spectrograph set at a grazing angle of 4°. These spectra occur in a very small wavelength interval, for example, ~2 A at 50 A in W In this spectral range we previously classified lines of the Ag and Pd Isoelectronic Sequences. We have now classified lines of the Rh Isoelectronic Sequence 4d9–4d84f, which accounts for the remaining strong lines in this dense but well-resolved group. No lines of this array have previously been identified. They were classified by comparison of observed and calculated transition energies along the Isoelectronic Sequence.
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rh i Isoelectronic Sequence observed from er 23 to pt 33
Journal of The Optical Society of America B-optical Physics, 1993Co-Authors: Jack Sugar, Victor Kaufman, William L. RowanAbstract:The TEXT tokamak was used to obtain spectra of highly ionized Er, Yb, Hf, W, and Pt. Injection of these elements into the plasma was achieved by laser ablation of thin films of metal deposited on glass slides and mounted at the inner wall of the vessel. The spectra were photographed with a 2.2-m grazing-incidence spectrograph set at a grazing angle of 4°. These spectra occur in a very small wavelength interval, for example, ~2 A at 50 A in W In this spectral range we previously classified lines of the Ag and Pd Isoelectronic Sequences. We have now classified lines of the Rh Isoelectronic Sequence 4d9–4d84f, which accounts for the remaining strong lines in this dense but well-resolved group. No lines of this array have previously been identified. They were classified by comparison of observed and calculated transition energies along the Isoelectronic Sequence.
Chao Chen - One of the best experts on this subject based on the ideXlab platform.
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Total atomic scattering factors for the ground states of the lithium Isoelectronic Sequence from Na8+ to Ca17+.
The Journal of chemical physics, 2005Co-Authors: Chao Chen, Zhi-wen WangAbstract:In this work, total atomic scattering factors for the ground states of the lithium Isoelectronic Sequence are calculated by using the full core plus correlation wave function. For the ground state of the lithium atom, our results are compared with the previous theoretical values in the literature; the influence of electron correlation on total atomic scattering factors is analyzed systematically and our results agree with previous configuration interaction calculations very well. For the ground states of the lithium Isoelectronic Sequence from Na8+ to Ca17+, the general functional behavior of total atomic scattering factors is analyzed together for each state of the Isoelectronic Sequence.
