TY - JOUR
T1 - Detection of sputtered and evaporated carbon aggregates
T2 - Relative and absolute electron ionization fragmentation yields
AU - Mair, C.
AU - Deutsch, H.
AU - Becker, K.
AU - Märk, T. D.
AU - Vietzke, E.
N1 - Funding Information:
This work has been carried out within the Association EURATOM-ÖAW and was partly supported by FWF, Wien, Austria. C.M. would like to thank the European Commission for supporting his visit to Jülich by a `mobility grant'.
PY - 2001/3
Y1 - 2001/3
N2 - The present study is a first attempt to determine electron impact ionization efficiencies for C2 and C3. A novel method has been applied to obtain the partial cross-section values for the reactions C2+e→C+, C2+e→C2+ and C3+e→C+, C3+e→C2+ and C3+e→C3+. The neutral target consisting of C, C2 and C3 is produced by thermal evaporation from a heated graphite sample and the neutral precursors in the subsequent ionization process can be distinguished by their different flight-time distributions acquired in the evaporation process. The partial ionization cross-section ratios obtained in this experiment have been calibrated with calculated absolute total ionization cross section curves of C2 and C3 using the Deutsch-Mark (DM) formalism.
AB - The present study is a first attempt to determine electron impact ionization efficiencies for C2 and C3. A novel method has been applied to obtain the partial cross-section values for the reactions C2+e→C+, C2+e→C2+ and C3+e→C+, C3+e→C2+ and C3+e→C3+. The neutral target consisting of C, C2 and C3 is produced by thermal evaporation from a heated graphite sample and the neutral precursors in the subsequent ionization process can be distinguished by their different flight-time distributions acquired in the evaporation process. The partial ionization cross-section ratios obtained in this experiment have been calibrated with calculated absolute total ionization cross section curves of C2 and C3 using the Deutsch-Mark (DM) formalism.
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U2 - 10.1016/S0022-3115(00)00577-8
DO - 10.1016/S0022-3115(00)00577-8
M3 - Article
AN - SCOPUS:0035278224
SN - 0022-3115
VL - 290-293
SP - 291
EP - 294
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
ER -