Deformation, nuclear motion and fragmentation of core-excited CO 2 probed by multiple-ion coincidence momentum imaging

N. Saito, Y. Muramatsu, H. Chiba, K. Ueda, K. Kubozuka, I. Koyano, K. Okada, O. Jagutzki, A. Czasch, T. Weber, M. Hattass, H. Schmidt-Böcking, R. Moshammer, M. Lavollée, U. Becker

研究成果: Article査読

17 被引用数 (Scopus)

抄録

The nuclear motion and geometry in core-excited CO2 are probed using a multiple-ion-coincidence imaging technique. We demonstrate that CO 2 has a linear stable geometry in the C/O 1s-1 core-ionized state and a bent geometry in the C/O 1s-1π* core-excited state. The molecules in the C/O 1s-1π* A 1 and B1 Renner-Teller states are probed to be bent in the A1 state and linear in the B1 state. The O-O correlation angle distributions are well reproduced using a Coulomb explosion model which takes account of the zero point bending motion in the ground state, the classical bending motion along the potential energy curve of the core-excited state within the core-hole lifetime and the initial inhomogeneous charge distribution in the multiply charged molecular ion just before the dissociation. When the photon energy is tuned to be higher (lower) energy than the 1s -1 π* resonance center, the events for the 1s-1 π* A1 states that result in the low O-O correlation angle distribution are suppressed (enhanced).

本文言語English
ページ(範囲)183-193
ページ数11
ジャーナルJournal of Electron Spectroscopy and Related Phenomena
141
2-3
DOI
出版ステータスPublished - 2004 12

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 放射線
  • 原子分子物理学および光学
  • 凝縮系物理学
  • 分光学
  • 物理化学および理論化学

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