中国物理B ›› 2005, Vol. 14 ›› Issue (12): 2478-2483.doi: 10.1088/1009-1963/14/12/018

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Superexcited states of carbon monoxide studied by fast-electron impact

钟志萍1, 范岚岚2, 朱林繁2, 刘小井2, 成华东2, 苑震生2, 徐克尊2   

  1. (1)College of Physical Science, Graduate School of the Chinese Academy of Sciences, Beijing 100049, China; (2)Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2005-04-22 修回日期:2005-08-08 出版日期:2005-12-20 发布日期:2005-12-20
  • 基金资助:
    Project supported by the National Nature Science Foundation of China (Grant Nos 10474089, 10134010 and 10004010).

Superexcited states of carbon monoxide studied by fast-electron impact

Fan Lan-Lan (范岚岚)a, Zhong Zhi-Ping (钟志萍)b, Zhu Lin-Fan (朱林繁)a, Liu Xiao-Jing (刘小井)a, Cheng Hua-Dong (成华东)a, Yuan Zhen-Sheng (苑震生)a, Xu Ke-Zun (徐克尊)a   

  1. a Hefei National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; b College of Physical Science, Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2005-04-22 Revised:2005-08-08 Online:2005-12-20 Published:2005-12-20
  • Supported by:
    Project supported by the National Nature Science Foundation of China (Grant Nos 10474089, 10134010 and 10004010).

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摘要： Absolute optical oscillator strength density and double differential cross section spectra of CO below 120\,eV are determined by fast electron impact. Some peaks above the first ionization threshold stand out as the momentum transfer square $K^2$ increases. The doubly excited Rydberg states converging to $C~^2\Sigma^+$, $D~^2\Pi$, and $F~^2\Pi$ states of CO$^+$, respectively, are confirmed in our spectra. Another peak at around 32\,eV is assigned to the transition of $(3\sigma)^{-1}(2\pi)^1~^1\Pi\leftarrow~X^1\Sigma^+ $.

关键词: oscillator strength, superexcited state, energy loss, CO

Abstract: Absolute optical oscillator strength density and double differential cross section spectra of CO below 120 eV are determined by fast electron impact. Some peaks above the first ionization threshold stand out as the momentum transfer square $K^2$ increases. The doubly excited Rydberg states converging to $C~^2\Sigma^+$, $D~^2\Pi$, and $F~^2\Pi$ states of CO$^+$, respectively, are confirmed in our spectra. Another peak at around 32 eV is assigned to the transition of $(3\sigma)^{-1}(2\pi)^1~^1\Pi\leftarrow~X^1\Sigma^+ $.

Key words: oscillator strength, superexcited state, energy loss, CO

中图分类号:  (Molecular excitation and ionization)

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33.70.Ca (Oscillator and band strengths, lifetimes, transition moments, and Franck-Condon factors)