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Citation: Pei Lin-Sen, Jin Jin, Gao Yi-De, Chen Cong-Xiang, Chen Yang. Resonance-enhanced Multiphoton lonization (REMPI) Spectrum of CH Radical[J]. Acta Physico-Chimica Sinica, ;2000, 16(04): 374-378. doi: 10.3866/PKU.WHXB20000416 shu

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

1.
Department of Chemical Physics,Open Laboratory of Band Selective Chemistry,University of Science and Technology of China,Hefei 230026

Received Date: 19 July 1999
Available Online: 15 April 2000

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.
- CH radical,
- REMPI,
- Laser photolysis
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