Radiative Data for Chlorine and Its Ions

Berrington, K A; Nakazaki, Shinobu

doi:10.1006/adnd.2002.0880

Cited by 13 publications

(14 citation statements)

References 84 publications

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“…The lowest 1 P o state in our calculation is the 3s 2 3p 3 ( 2 D o )3d 1 P o state with a 56.6% contribution to the eigenvectors. Our identification is in agreement with the NIST compilation and CI calculation of Deb et al (2003), but disagrees with the recent R-matrix calculations of Berrington and Nakazaki (2002) and the Moore (1949) energy levels table. The composition of the 3s 2 3p 3 ( 2 D o )3d 1 P o state in our calculation is 56.6% 3s 2 3p 3 ( 2 D o )3d 1 P o , 34.2% 3s3p 5 1 P o and 2.7% 3s 2 3p 3 ( 2 P o )3d 1 P o , which is in agreement with the NIST results of 57% 3s 2 3p 3 ( 2 D o )3d 1 P o and 33% 3s3p 5 1 P o , but differ with the calculation of Deb et al (2003).…”

Section: Series Perturbationssupporting

confidence: 52%

“…The available calculated and experimental oscillator strengths of transitions in Cl II are rather sparse. Radiative data for chlorine and its ions are presented by Berrington and Nakazaki (2002) using the R-matrix method (Berrington et al 1995) in the L S coupling scheme. They reported bound state energies, oscillator strengths and ground state photoionization cross sections.…”

Section: Introductionmentioning

confidence: 99%

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Strong term dependence of wavefunctions and series perturbations in singly ionized chlorine

Tayal

2003

J. Phys. B: At. Mol. Opt. Phys.

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The strong interactions between the different 3s23p3nl (l = 0, 2) Rydberg series and the 3s3p5 perturber states in singly ionized chlorine have been investigated using term-dependent non-orthogonal orbitals in the multiconfiguration Hartree–Fock approach. Progressively larger calculations are performed in a systematic manner to evaluate these interactions adequately. The wavefunctions exhibit large correlation corrections. The basis set of functions contains both spectroscopic and correlation orbitals to describe the low-lying Rydberg series members and to account for the higher bound and continuum parts of the series. The mean radii of the correlation orbitals are comparable to the n = 3 and 4 spectroscopic orbitals and thus the correlation corrections are very well represented. There is excellent agreement between the calculated and measured excitation energies and also between the length and velocity formulations of oscillator strength.

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Section: Series Perturbationssupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Strong term dependence of wavefunctions and series perturbations in singly ionized chlorine

Tayal

2003

J. Phys. B: At. Mol. Opt. Phys.

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“…The principal objective of these projects is to expand our understanding of astrophysical observations [5]. However, most of the data currently available on photoionization (PI) for neutrals and ions is obtained from theoretical calculations [6].…”

Section: Introductionmentioning

confidence: 99%

Absolute measurements of chlorine Cl+ cation single photoionization cross section

Hernández

Juarez

Kilcoyne

et al. 2015

Journal of Quantitative Spectroscopy and Radiative Transfer

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The photoionization of Cl + leading to Cl 2+ was measured in the photon energy range of 19.5 to 28 eV. A spectrum with a photon energy resolution of 15 meV normalized to absolute crosssection measurements is presented. The measurements were carried out by merging a Cl + ion beam with a photon beam of highly monochromatic synchrotron radiation at the Advanced Light Source at Lawrence Berkeley National Laboratory. The measured photoionization of Cl + consists of several autoionization resonances surperimposed on the direct photoionization signal. Most of the prominent resonances are assigned to members of Rydberg series originating from the singlet ground state and from metastable triplet levels within the ground-state configuration of Cl +. The direct ionization cross section is no larger than 12 Mb.

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“…Many theoretical studies of transitions in Ne-like ions have been made during the past 30-40 years, especially for transitions including the 2s 2 2p 5 3l and 2s2p 6 3l states. Transition rates, oscillator strengths and line strengths in Ne-like ions have been calculated using Z-expansion [1][2][3], model potential (MP) [4][5][6][7], configuration-interaction (CI) [8][9][10][11][12][13], multi-configuration Hartree-Fock (MCHF) [14][15][16][17], R-matrix [18,19], multi-configuration Dirac-Fock (MCDF) [20] and relativistic many-body perturbation theory (RMBPT) [21][22][23][24][25] methods.…”

Section: Introductionmentioning

confidence: 99%

Relativistic many-body calculations of electric-dipole lifetimes, transition rates and oscillator strengths for 2l⁻¹3l′ states in Ne-like ions

Safronova

Cowan

Safronova

2005

J. Phys. B: At. Mol. Opt. Phys.

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Transition rates, oscillator strengths and line strengths are calculated for electric-dipole (E1) transitions between odd-parity 2s22p53s, 2s22p53d and 2s2p63p states and even-parity 2s22p53p, 2s2p63s and 2s2p63d states in Ne-like ions with the nuclear charges ranging from Z = 14 to 100. Relativistic many-body perturbation theory (RMBPT), including the Breit interaction, is used to evaluate retarded E1 matrix elements in length and velocity forms. The calculations start from a 1s22s22p6 Dirac–Fock potential. First-order RMBPT is used to obtain intermediate coupling coefficients and second-order RMBPT is used to calculate transition matrix elements. Contributions from negative-energy states are included in the second-order E1 matrix elements to ensure the gauge independence of transition amplitudes. Transition energies used in the calculation of oscillator strengths and transition rates are from second-order RMBPT. Lifetimes of the 16 even-parity and 18 odd-parity levels are given for Z = 14–100. Transition rates, line strengths and oscillator strengths are compared with critically evaluated experimental values and with results from other recent calculations. These atomic data are important in the modelling of L-shell radiation spectra of heavy ions generated in electron beam ion trap experiments and in L-shell diagnostics of plasmas.

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Radiative Data for Chlorine and Its Ions

Cited by 13 publications

References 84 publications

Strong term dependence of wavefunctions and series perturbations in singly ionized chlorine

Strong term dependence of wavefunctions and series perturbations in singly ionized chlorine

Absolute measurements of chlorine Cl+ cation single photoionization cross section

Relativistic many-body calculations of electric-dipole lifetimes, transition rates and oscillator strengths for 2l⁻¹3l′ states in Ne-like ions

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Radiative Data for Chlorine and Its Ions

Cited by 13 publications

References 84 publications

Strong term dependence of wavefunctions and series perturbations in singly ionized chlorine

Strong term dependence of wavefunctions and series perturbations in singly ionized chlorine

Absolute measurements of chlorine Cl+ cation single photoionization cross section

Relativistic many-body calculations of electric-dipole lifetimes, transition rates and oscillator strengths for 2l−13l′ states in Ne-like ions

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Relativistic many-body calculations of electric-dipole lifetimes, transition rates and oscillator strengths for 2l⁻¹3l′ states in Ne-like ions