TY - JOUR
T1 - Collision-energy-resolved Penning ionization electron spectroscopy of OCS with He*(23S) metastable atoms
AU - Kishimoto, Naoki
AU - Horio, Takuya
AU - Maeda, Satoshi
AU - Ohno, Koichi
N1 - Funding Information:
This work has been supported by a Grant in Aid for Scientific Research from the Japanese Ministry of Education, Culture, Sports, Science and Technology. The authors are grateful to Dr. T. Pasinszki from Technical University of Budapest for helpful discussions. They also appreciate the supports by Mr. R. Maruyama in the experiment and Mr. M. Yamazaki in the calculation.
PY - 2003/9/26
Y1 - 2003/9/26
N2 - Collision-energy dependence of partial Penning ionization cross-sections (CEDPICS) of OCS was obtained from collision-energy/electron-energy-resolved two-dimensional spectrum with a highly sensitive electron energy analyzer. The negative CEDPICS for X2Π and C2Σ+ states indicates attractive interaction around S and O atoms with He *(23S), where the corresponding 3π(S 3p-O2p) and 8σ(σCO) orbitals extend, respectively. Utilizing classical trajectory calculations for CEDPICS and optimization of model potential energy surface, a large ring-like attractive well with a depth of ca. 120 meV was found for perpendicular directions around C S axis and smaller interaction was found in the collinear direction of the C O axis with well depth of ca. 70 meV around the oxygen atom in the lone pair region by sp2 hybridization.
AB - Collision-energy dependence of partial Penning ionization cross-sections (CEDPICS) of OCS was obtained from collision-energy/electron-energy-resolved two-dimensional spectrum with a highly sensitive electron energy analyzer. The negative CEDPICS for X2Π and C2Σ+ states indicates attractive interaction around S and O atoms with He *(23S), where the corresponding 3π(S 3p-O2p) and 8σ(σCO) orbitals extend, respectively. Utilizing classical trajectory calculations for CEDPICS and optimization of model potential energy surface, a large ring-like attractive well with a depth of ca. 120 meV was found for perpendicular directions around C S axis and smaller interaction was found in the collinear direction of the C O axis with well depth of ca. 70 meV around the oxygen atom in the lone pair region by sp2 hybridization.
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U2 - 10.1016/j.cplett.2003.08.046
DO - 10.1016/j.cplett.2003.08.046
M3 - Article
AN - SCOPUS:0141829753
VL - 379
SP - 332
EP - 339
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 3-4
ER -