TY - JOUR
T1 - Absolute cross sections and kinetic energy release for doubly and triply charged fragments produced by electron impact on CO+
AU - Lecointre, J.
AU - Belic, D. S.
AU - Jureta, J. J.
AU - Becker, K.
AU - Deutsch, H.
AU - Limtrakul, J.
AU - Märk, T. D.
AU - Probst, M.
AU - Defrance, P.
PY - 2007/1/14
Y1 - 2007/1/14
N2 - Absolute cross sections for electron impact ionization of CO+ leading to the formation of doubly and triply charged products (CO2+, C2+ and O2+, C3+ and O3+) are reported in the energy range from their respective thresholds to 2500 eV. Around the maximum, cross section values are found to be (13.36 0.56) × 10 -18 cm2, (5.58 0.55) × 10-18 cm 2 and (1.37 0.14) × 10-18 cm2 for CO 2+, C2+ and O2+, respectively, and (28.3 7.0) × 10-21 cm2 and (2.4 0.7) × 10-21 cm2 for C3+ and O3+, respectively. The analysis of ionic product velocity distributions, obtained by means of a crossed electron-ion beam set-up, allows the determination of the kinetic energy release distributions. They are seen to extend from 0 to 50 eV both for C2+ and O2+. The mean kinetic energy releases for C3+ and O3+ are found to be 33 5 eV and 39 9 eV, respectively. The cross sections are seen to depend exponentially on the potential energy of each dissociated ion pair. The total single CO+ ionization cross section calculated by application of the Deutsch-Märk (DM) formalism is found to be in good agreement with the experimental results.
AB - Absolute cross sections for electron impact ionization of CO+ leading to the formation of doubly and triply charged products (CO2+, C2+ and O2+, C3+ and O3+) are reported in the energy range from their respective thresholds to 2500 eV. Around the maximum, cross section values are found to be (13.36 0.56) × 10 -18 cm2, (5.58 0.55) × 10-18 cm 2 and (1.37 0.14) × 10-18 cm2 for CO 2+, C2+ and O2+, respectively, and (28.3 7.0) × 10-21 cm2 and (2.4 0.7) × 10-21 cm2 for C3+ and O3+, respectively. The analysis of ionic product velocity distributions, obtained by means of a crossed electron-ion beam set-up, allows the determination of the kinetic energy release distributions. They are seen to extend from 0 to 50 eV both for C2+ and O2+. The mean kinetic energy releases for C3+ and O3+ are found to be 33 5 eV and 39 9 eV, respectively. The cross sections are seen to depend exponentially on the potential energy of each dissociated ion pair. The total single CO+ ionization cross section calculated by application of the Deutsch-Märk (DM) formalism is found to be in good agreement with the experimental results.
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U2 - 10.1088/0953-4075/40/1/008
DO - 10.1088/0953-4075/40/1/008
M3 - Article
AN - SCOPUS:33847196832
SN - 0953-4075
VL - 40
SP - 85
EP - 100
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
IS - 1
M1 - 008
ER -