Core-excited autoionizing states in the alkali metals

Pegg, D. J.; Haselton, H.H.; Thoe, R. S.; Griffin, P. M.; Brown, M. D.; Sellin, I. A.

doi:10.1103/physreva.12.1330

Cited by 96 publications

(27 citation statements)

References 26 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: 80%

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: 80%

Absolute term energy of core-excited doublet states of lithium

Chen

Chung

1994

Phys. Rev. A

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“…Both experimental [27,28,29,30,31,32,33,34,35] and theoretical data [36,37,38,39,40,41,42,43,44,45,46,47,48,49] are abundant. 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.…”

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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“…In Sequence A.1 the collision results in an excited, neutral Na 0 * atom that can decay by emitting a characteristic electron. Gas-phase collisional excitation of Na + has also been attributed to Sequence A.1 for single-collision-regime measurements [ 32 – 34 ] where the observed deexcitation is from Na 0 *. Electron spectra, observed in inert-gas atom excitation due to Sequence A.2 for neon atom collisions with Na + [ 32 ], have been assigned to the deexcitation of neutral, doubly-excited Ne 0 **.…”

Section: Collisional Kinetics In a Sodium Halide Latticementioning

confidence: 99%

Bombardment induced electron-capture processes at sodium halide surfaces

Fine¹,

Szymoński²,

Kołodziej³

et al. 1996

J. Res. Natl. Inst. Stand. Technol.

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Discrete features observed in the energy distribution of electrons emitted from ion-bombarded sodium halide surfaces can be attributed to a new type of collisional deexcitation mechanism. Such a mechanism involves sodium atoms in bombardment-excited autoionizing states that are the result of cascade collisions within the crystal lattice. This deexcitation process, in contrast to that for a metal, is not simply a consequence of the inner-shell lifetime of the initial collisionally excited sodium Na+* ion. Rather, the deexcitation consists of a sequence of lattice collisions during which the excited Na+* ion captures an electron to form the inner-shell-excited Na0* states responsible for the observed transitions. The formation of such autoionizing Na0* states is described within the framework of a new model in which excitation processes and localized collisional electron-transfer mechanisms are taken into account. These localized electron-transfer processes make possible new channels for electronic deexcitation, chemical dissociation, and defect production; they are critical for understanding inelastic ion-surface collisions in solids.

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Core-excited autoionizing states in the alkali metals

Cited by 96 publications

References 26 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

Bombardment induced electron-capture processes at sodium halide surfaces

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