TY - JOUR
T1 - Vibrational excitation of CO molecules by infrared free electron laser
AU - Ogi, Y.
AU - Endo, T.
AU - Tsukiyama, K.
AU - Kondoh, H.
AU - Tono, K.
AU - Ogawa, Y.
AU - Hamada, Y.
AU - Ohta, T.
AU - Kuroda, H.
N1 - Funding Information:
We gratefully acknowledge the skillful assistance by the FEL-SUT staffs. This work is partly supported by Grant-in-Aid for Creative Scientific Research, JSPS (No. 11NP0101) and a special grant from Tokyo University of Science.
PY - 2003/1
Y1 - 2003/1
N2 - This paper describes the vibrational excitation of CO molecules by FEL-SUT (Free Electron Laser at Tokyo University of Science). FEL is tuned to 4.67 μm, corresponding to the X1Σ+(v″ = 1)←(v″ = 0) transition of CO. The population of the vibrationally excited states is probed by the (2 + 1) resonance enhanced multiphoton ionization technique via the B1Σ+ Rydberg state. We find that ∼10% of the population in v″ = 0 is excited to v″ = 1. In spite of the existence of the resonant vibrational ladder climbing channels via specific rotational levels, no signal originating from v″ = 2 is detectable. The predissociation in the B1Σ+(v′ = 2) state is believed to be responsible for the absence of CO+ signals.
AB - This paper describes the vibrational excitation of CO molecules by FEL-SUT (Free Electron Laser at Tokyo University of Science). FEL is tuned to 4.67 μm, corresponding to the X1Σ+(v″ = 1)←(v″ = 0) transition of CO. The population of the vibrationally excited states is probed by the (2 + 1) resonance enhanced multiphoton ionization technique via the B1Σ+ Rydberg state. We find that ∼10% of the population in v″ = 0 is excited to v″ = 1. In spite of the existence of the resonant vibrational ladder climbing channels via specific rotational levels, no signal originating from v″ = 2 is detectable. The predissociation in the B1Σ+(v′ = 2) state is believed to be responsible for the absence of CO+ signals.
KW - CO
KW - Free electron laser
KW - REMPI
KW - Vibrational excitation
UR - http://www.scopus.com/inward/record.url?scp=0037285445&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037285445&partnerID=8YFLogxK
U2 - 10.1016/S0368-2048(02)00211-6
DO - 10.1016/S0368-2048(02)00211-6
M3 - Article
AN - SCOPUS:0037285445
SN - 0368-2048
VL - 128
SP - 67
EP - 73
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
IS - 1
ER -