Showing papers by "Alfred Müller published in 1980"
TL;DR: In this article, the absolute ionisation cross sections for electrons incident on O+, Ne+, Xe+ and Ar1, Xe+, Ar5+ ions have been measured at electron energies between the ionisation threshold Ei and 830 eV.
Abstract: Absolute ionisation cross sections for electrons incident on O+, Ne+, Xe+ and Ar1+,..., Ar5+ ions have been measured at electron energies Ee between the ionisation threshold Ei and 830 eV. The measurements have been performed with crossed electron and ion beams. The comparison of the data for O+ and Ne+ with results of Aitken and Harrison (see ibid., vol.4, p.1176, 1971) and Dolder et al. (see Rep. Prog. Phys., vol.39, p.693, 1976), respectively, shows agreement within the combined experimental errors. The measured cross sections for ionisation of Ari+ ions can be reproduced within +or-20% of the empirical formula sigma i,i+1=1.4*10-13((ln(Ee/Ei))/(EeEi))(eV)2 cm2 for the charge states i=1 up to i=5.
73 citations
TL;DR: With the use of crossed beams of electrons and multiply charged argon ions, dominant contributions of L-shell ionization to multiple ionization of Ar/sup i/+ ions (i=1,2,3) at electron energies below 800 eV are identified.
Abstract: With the use of crossed beams of electrons and multiply charged argon ions, dominant contributions (above 90%) of L-shell ionization to multiple ionization of Ar/sup i/+ ions (i=1,2,3) at electron energies below 800 eV are identified. The observed contributions are explained in terms of the electron rearrangement processes following L-shell ionization.
55 citations
TL;DR: In this paper, the efficiency of a channel-electron multiplier (VALVO B 419 BL-01 with entrance cone) has been measured for incident H, He, Ar, Kr and Xe ions with energies between 4 and 15 keV.
49 citations
TL;DR: In this paper, cross sections for electron capture by Li 3+ ions from H atoms have been measured in the energy range 9 −42 keV and above 20 keV, respectively.
18 citations
TL;DR: In this article, the absolute ionisation cross sections for electrons incident on CO2+ ions have been measured at electron energies from threshold up to 830eV and the maximum cross section maximum is nearly 4*10-17 cm2 at an electron energy of about 150eV.
Abstract: Absolute ionisation cross sections for electrons incident on CO2+ ions have been measured at electron energies from threshold up to 830eV. The measurements have been performed with crossed electron and ion beams. By extrapolation of the cross section a threshold energy of (23.8+or-0.5)eV is determined. The cross section maximum is nearly 4*10-17 cm2 at an electron energy of about 150eV.
6 citations