TY - JOUR
T1 - Revised high energy behavior of the Deutsch-Märk (DM) formula for the calculation of electron impact ionization cross sections of atoms
AU - Deutsch, H.
AU - Scheier, P.
AU - Becker, K.
AU - Märk, T. D.
N1 - Funding Information:
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. It was partially supported by the FWF, ÖNB, and ÖAW, Wien, Austria. One of us (K.B.) would like to acknowledge partial financial support from the Division of Chemical Sciences, Office of Basic Energy Science, Office of Science, U.S. Department of Energy.
PY - 2004/4/15
Y1 - 2004/4/15
N2 - We modified the Deutsch-Märk (DM) formula for the calculation of single atomic ionization cross sections by replacing the previously used Gryzinsky-type energy dependence by a "scaled" ln(E)/E energy dependence. This modified energy dependence yields, in the limit of high impact energies, the well-established Born-Bethe ln(E)/E energy dependence, while reproducing, at lower impact energies, the DM cross section function. The revised DM formula, whose energy dependence has been determined from a fitting procedure using reliable, measured ionization cross sections for the atoms H, He, C, Ne, Mg, Al, and Ag, was subsequently used to calculate as an example ionization cross sections for the atoms O, F, P, Ar, Ge, Kr, and Xe and excellent to very good agreement was found between the calculated and the measured cross sections for these atoms over a wide range of impact energies.
AB - We modified the Deutsch-Märk (DM) formula for the calculation of single atomic ionization cross sections by replacing the previously used Gryzinsky-type energy dependence by a "scaled" ln(E)/E energy dependence. This modified energy dependence yields, in the limit of high impact energies, the well-established Born-Bethe ln(E)/E energy dependence, while reproducing, at lower impact energies, the DM cross section function. The revised DM formula, whose energy dependence has been determined from a fitting procedure using reliable, measured ionization cross sections for the atoms H, He, C, Ne, Mg, Al, and Ag, was subsequently used to calculate as an example ionization cross sections for the atoms O, F, P, Ar, Ge, Kr, and Xe and excellent to very good agreement was found between the calculated and the measured cross sections for these atoms over a wide range of impact energies.
KW - Atoms
KW - Cross sections
KW - Electron impact ionization
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U2 - 10.1016/j.ijms.2003.06.002
DO - 10.1016/j.ijms.2003.06.002
M3 - Article
AN - SCOPUS:2142699988
SN - 1387-3806
VL - 233
SP - 13
EP - 17
JO - International Journal of Mass Spectrometry
JF - International Journal of Mass Spectrometry
IS - 1-3
ER -