物理化学学报 >> 2000, Vol. 16 >> Issue (04): 374 -378 .doi: 10.3866/PKU.WHXB20000416

研究简报 上一篇    下一篇

CH自由基共振增强多光子电离光谱

裴林森, 金瑾, 高义德, 陈从香, 陈旸   

  1. 中国科技大学,选键化学开放实验室,化学物理系,合肥 230026
  • 收稿日期:1999-07-19 修回日期:1999-11-08 发布日期:2000-04-15
  • 通讯作者: 陈旸

Resonance-enhanced Multiphoton lonization (REMPI) Spectrum of CH Radical

Pei Lin-Sen, Jin Jin, Gao Yi-De, Chen Cong-Xiang, Chen Yang   

  1. Department of Chemical Physics,Open Laboratory of Band Selective Chemistry,University of Science and Technology of China,Hefei 230026
  • Received:1999-07-19 Revised:1999-11-08 Published:2000-04-15
  • Contact: Chen Yang

关键词: CH自由基, REMPI, 激光光解

Abstract:

CH radicals were prepared by photolysis of CHBr3 molecule, and were ionized by the same laser. Monitoring CH+, C+ and H+ ions signals, the CH REMPI spectrum was obtained in the range of 241-251nm.The CH D2Π(v=2)←A2Δ(v=0)(1+1) resonance transition was assigned. The rotational constants of CH D2Π(v=2) state were obtained by analyzing the REMPI spectrum. It was found that there is a broad feature peak at 247.6nm in C+ mass-specific spectrum. Based on the theoretical result, the broad feature peak is correlated with an unreported predissociation Rydberg state (3 2Π) which converges to CH+(A,1Π) state.

Key words: CH radical, REMPI, Laser photolysis