TY - JOUR
T1 - High resolution multiple electron impact ionisation of He, Ne, Ar, Kr and Xe atoms close to threshold
T2 - HCI - 2001
AU - Gstir, B.
AU - Denifl, S.
AU - Hanel, G.
AU - Rümmele, M.
AU - Fiegele, T.
AU - Stano, M.
AU - Feketeova, L.
AU - Matejcik, S.
AU - Becker, K.
AU - Scheier, P.
AU - Märk, T. D.
N1 - Funding Information:
Work partly supported by the FWF, ÖAW and ÖNB, Wien, Austria, and the European Commission, Brussels. Moreover, this work has been carried out within the Association EURATOM-ÖAW. The content of the publication is the sole responsibility of its publishers and it does not necessarily represent the views of the EU Commission or its services. One of us (K.B.) would like to acknowledge partial support from the US National Aeronautics and Space Administration (NASA) through grant NAG5-8971.
PY - 2003/5
Y1 - 2003/5
N2 - We have determined appearance energies AE(Xn+/X) for the formation of multiply charged He, Ne, Ar, Kr and Xe ions up to charge state n = 2 (He), n = 4 (Ne), n = 6 (Ar), n = 6 (Kr) and n = 8 (Xe) using a recently commissioned high-resolution electron impact ionization mass spectrometer. The data analysis is based on the Marquart-Levenberg algorithm, involving an iterative, non-linear least-squares fitting of the threshold data assuming a 2-function or a 3-function fit based on a Wannier-type power law. This allows us to extract the relevant AEs and corresponding Wannier exponents.
AB - We have determined appearance energies AE(Xn+/X) for the formation of multiply charged He, Ne, Ar, Kr and Xe ions up to charge state n = 2 (He), n = 4 (Ne), n = 6 (Ar), n = 6 (Kr) and n = 8 (Xe) using a recently commissioned high-resolution electron impact ionization mass spectrometer. The data analysis is based on the Marquart-Levenberg algorithm, involving an iterative, non-linear least-squares fitting of the threshold data assuming a 2-function or a 3-function fit based on a Wannier-type power law. This allows us to extract the relevant AEs and corresponding Wannier exponents.
KW - Electron impact ionization
KW - Hemispherical electron monochromator
KW - Ionization energy
KW - Rare gases
KW - Threshold law
KW - Wannier exponent
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U2 - 10.1016/S0168-583X(02)02042-6
DO - 10.1016/S0168-583X(02)02042-6
M3 - Conference article
AN - SCOPUS:0038332046
SN - 0168-583X
VL - 205
SP - 413
EP - 416
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Y2 - 1 September 2002 through 6 September 2002
ER -