Atomic states of lithium by the beam-foil technique in the spectral range 400?1900 �

Schürmann, D.

doi:10.1007/bf01435575

Z Physik A

1975

DOI: 10.1007/bf01435575

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Atomic states of lithium by the beam-foil technique in the spectral range 400?1900 �

D. Schürmann

Abstract: Abstract. 6Li+-ions accelerated electrostatically to energies of 200-390keV are electronically excited by the beam-foil technique. The emitted light is analyzed with a SeyaNamioka VUV monochromator in the wavelength range 400-1900A. All Li II and Li III lines known from theory-in one case emitted by a n =9 level-are detected, several of them for the first time. Lifetimes of 20 Li II levels, some not measured previously, are determined after correction for cascades. The accuracy of the experimental values for s… Show more

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1983

1985

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Cited by 4 publications

References 13 publications

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The Quartet System of Li I

Mannervik¹,

Cederquist²

1983

Phys. Scr.

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The doubly-excited system of quarters in Li I have been studied by the beam-foil technique using optical detection in the VUV. The absolute term value of the lowest quartet 1s2s2p 4P0 has been determined to be 57.4113 ± 0.0006 eV which is much more accurate than earlier experimental results. We have also made the first experimental determination of the term energy of the 1s2p3p 4P state by observing its decay to the 1s2s2p 4P0 state by emission of a spectral line at 1680.2 A. In addition, eight new observations of quartet transitions are reported as well as some lifetimes. The most recent experimental results are summarized and compared to calculations.

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The Quartet System of Li I

Mannervik¹,

Cederquist²

1983

Phys. Scr.

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Lifetimes of the Singly Excited States in Li II

Theodosiou¹

1985

Phys. Scr.

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Rydberg state lifetimes in the singly ionized lithium atom were calculated using an inward integration approach and a Hartree-Slater potential to represent the ionic core. The calculated oscillator strengths for the s-p and p-d transitions compare favorably with high accuracy calculations using Hylleraas-type wavefunctions for the limited number of states for which such results are available. Comparison with the also sparse experimental studies of lifetimes is good overall and our predictions indicate specific revisions of some experimental determinations. The effects due to black-body radiation were explicitly included, but found to be insignificant for the states with n < 11, even at temperatures of 600 K.

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Autoionizing states in Li i observed in optical-emission spectra

Cederquist¹,

Mannervik²

1985

Phys. Rev. A

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Atomic states of lithium by the beam-foil technique in the spectral range 400?1900 �

Cited by 4 publications

References 13 publications

The Quartet System of Li I

The Quartet System of Li I

Lifetimes of the Singly Excited States in Li II

Autoionizing states in Li i observed in optical-emission spectra

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