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Elektronenstoßanregung und Polarisation der He II-Fowler-α-Linie (1966)

Haidt, D. ; Kleinpoppen, H.

Springer

The European physical journal 196 (1966), S. 72-76

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ISSN: 1434-601X

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The hydrogen-like He II-Fowler-α-(λ=4686 Å)-line has been excited by single electron impact collisions with ground-state helium atoms. The excitation-ionization function was measured from the threshold (76 eV) to 300 eV in a pressure-independent range. A broad maximum of the excitation-ionization function was observed at 200 eV. The line excited by a parallel electron beam has been proved polarized in the energy range quoted above. The degree of polarization increased monotonously from 6% at 300 eV to 13% near the excitation threshold. Comparison was made with previous experimental work. No polarization of the Fowler-α-Line was reported in other investigations. The shape of the excitation-ionization function agrees with that ofJohn andLin. Comparison with theoretical calculations is not as yet possible because only results of Born approximations are available.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01330910

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