Autoionization spectra of Li I and Li II excited by H<sup>+</sup>and He<sup>+</sup>impact

Ziem, P.; Stolterfoht, N.; Bruch, R.

doi:10.1088/0022-3700/8/18/004

Cited by 99 publications

(46 citation statements)

References 18 publications

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“…The fact that these resonances were measured with high precision has stimulated considerable interest. Some of these resonances were also observed later in electron spectra with a larger error bar [3][4][5].…”

Section: Introductionmentioning

confidence: 81%

“…The corresponding energy Eb and wave function %& (1,2,3) are obtained by solving the secular equation from &q, /H, iq, )…”

Section: Theorymentioning

confidence: 99%

“…'s can be estimated from Drake's results [41]. For example, for [( ls 2p ) P, 3d ]2D', it is -8.938 -0.08 -0.238 = -9.26(20)cm (3) -9.02+ l.013 = -8.01 (20)cm (4) For [ls(2s2p) P] P' and [ls(2s2p) 'P] P', no well defined core is present. We take the average of 1s2s 'S, 1s2s S, 1s2p 'P, and 1s2p Pto give -9.02+0.22 = -8.80 (30)cm…”

Section: Theorymentioning

confidence: 99%

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Absolute term energy of core-excited doublet states of lithium

Chen

Chung

1994

Phys. Rev. A

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Thirteen core-excited lithium doublet states of the P, P', D, and D' symmetries are calculated with a multiconSguration-interaction wave function. A variation method is used for the bound states whereas the saddle-point and saddle-point complex-rotation methods are used for the autoionizing states. A restricted variation method is used for the saturated wave functions. Fine structures, relativistic corrections, and mass polarization corrections are calculated. The quantum electrodynamic corrections are also estimated. The absolute term energy is predicted with an uncertainty which is much smaller than that in the literature. Among these core-excited states, ten doublet-doublet transitions and one doubletquartet transition have been measured. The largest error bar for the transition energy has been 6.2 cm whereas others range from 0.5 to 3.3 cm . Our predicted transition wavelengths agree with the experiment for 10 of the 11 transitions. The only discrepancy is about 2 cm . In the case where there is a disagreement between different experiments, our results show a clear preference in the comparison. The transition rates calculated in this work suggest that other spectral lines may &iso be observed in future experiments.

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Section: Introductionmentioning

confidence: 81%

“…The corresponding energy Eb and wave function %& (1,2,3) are obtained by solving the secular equation from &q, /H, iq, )…”

Section: Theorymentioning

confidence: 99%

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Absolute term energy of core-excited doublet states of lithium

Chen

Chung

1994

Phys. Rev. A

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“…In TABLE I to TABLE III we present the total and excitation energies of our calculations with PW and LYP correlation potentials and energy functionals for inner-shell excited states 1s2sns 2,4 S (n = 2 ∼ 8), 1s2snp 2,4 P (n = 2 ∼ 8), and 1s2p 2 2 S, 2,4 P , and 2 D, respectively. For comparison we also list in these tables representative experimental data [29,31,34] as well as theoretical results obtained from calculations using density work-functional formalism (WF) [36], saddlepoint complex-rotation (SPCR) [37,38,39,40], extensive configuration-interaction calculation (ECI) [43,44,45,46], and Rayleigh-Ritz variational method (RRV) [49].…”

Section: A Inner-shell Excitation Of LImentioning

confidence: 99%

Inner-shell excitation of open-shell atoms: a spin-dependent localized Hartree–Fock density-functional approach

Zhou¹,

Chu²

2007

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

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The spin-dependent localized Hartree-Fock (SLHF) density-functional approach is extended to the treatment of the inner-shell excited-state calculation of open-shell atomic systems. In this approach, the electron spin-orbitals in an electronic configuration are obtained by solving Kohn-Sham (KS) equation with SLHF exchange potential and the Slater's diagonal sum rule is used to evaluate the multiplet energy of an inner-shell excited state from the single-Slater-determinant energies of the electronic configurations involved. This approach together with the correlation potentials and energy functionals proposed by Perdew and Wang's (PW) or Lee, Yang, and Parr's (LYP) have been used to calculate the total and excitation energies of inner-shell excited states of open-shell atomic systems: Li, B, Ne + , Ne 2+ , Ne 3+ , and Na. The results with the PW and LYP energy functionals are in overall good agreement with each other and also with available experimental and other ab initio theoretical data. Some new results for highly excited inner-shell states are presented.

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“…The doubly excited 1 P o resonant states of Li + have been observed firstly by Dual Laser Plasma technique [1]. They were also studied experimentally by beam-foil techniques [2,3], and using the ejected electron spectroscopy method [4]. After high-resolution monochromators at synchrotron-radiation facilities have been developed, highresolution measurements on Li + ion were performed at the Advanced Light Source [5] and Super-ACO [6].…”

Section: Introductionmentioning

confidence: 99%

The¹P^oresonant states of LiII between the N = 2 and 3 thresholds

Chen¹

2009

J. Phys.: Conf. Ser.

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Abstract. We studied the lowest five doubly excited 1 P o resonant states of Li + between the N=2 and 3 thresholds by the saddle-point complex rotation method with B-spline functions. The doubly excited states are grouped in Rydberg series labeled by the quantum numbers K, T, A. Our results of energies and widths are in good agreement with other theoretical and experimental results. IntroductionDoubly excited states of two-electron atom and ions have attracted physicists to study experimentally and theoretically. The doubly excited 1 P o resonant states of Li + have been observed firstly by Dual Laser Plasma technique [1]. They were also studied experimentally by beam-foil techniques [2,3], and using the ejected electron spectroscopy method [4]. After high-resolution monochromators at synchrotron-radiation facilities have been developed, highresolution measurements on Li + ion were performed at the Advanced Light Source [5] and Super-ACO [6]. Diehl et al [6] have measured the doubly excited states of Li + below n=2 threshold. More recently, absolute cross-section measurements for the double photoexcitation of Li + ion have been performed by using the photo-ion merged-beam endstation. Accurate measurements on several members of the 1 P o Li + ( 2 (0,1) + n , 3 (1,1) + n ) ion have been made [7,8,9]. On the theoretical side, some resonances have been studied by the complex rotation method [10], the diagonalization approximation [11], the pseudo-potential-Feshbach method [12], the saddle-point complex-rotation method [13],the variation method with combining Hylleraas and incomplete hydrogenic wave functions [15], the density-functional method [14], the R-matrix method [7,8,9] , the saddle-point complex rotation method [16], and the SCUNC method [17].

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Autoionization spectra of Li I and Li II excited by H⁺and He⁺impact

Cited by 99 publications

References 18 publications

Absolute term energy of core-excited doublet states of lithium

Absolute term energy of core-excited doublet states of lithium

Inner-shell excitation of open-shell atoms: a spin-dependent localized Hartree–Fock density-functional approach

The¹P^oresonant states of LiII between the N = 2 and 3 thresholds

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Autoionization spectra of Li I and Li II excited by H+and He+impact

Cited by 99 publications

References 18 publications

Absolute term energy of core-excited doublet states of lithium

Absolute term energy of core-excited doublet states of lithium

Inner-shell excitation of open-shell atoms: a spin-dependent localized Hartree–Fock density-functional approach

The1Poresonant states of LiII between the N = 2 and 3 thresholds

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Autoionization spectra of Li I and Li II excited by H⁺and He⁺impact

The¹P^oresonant states of LiII between the N = 2 and 3 thresholds