State-to-state and total rotational energy transfer rate constants for CN(B 2Σ+,v=0,N)+He and C2N2

Autor:	F. J. Morgan, C. M. Sadowski, Jingzhong Guo, Q. Gao
Rok vydání:	2000
Předmět:	Range (particle radiation) Dye laser Excimer laser Chemistry medicine.medical_treatment Photodissociation Analytical chemistry General Physics and Astronomy Rotational energy Reaction rate constant Torr Radiative transfer medicine Physical and Theoretical Chemistry Atomic physics
Zdroj:	The Journal of Chemical Physics. 113:7276-7285
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.1313539
Popis:	Total rotational energy transfer (RET) rate constants, state-to-state RET rate constants, and radiative lifetimes have been measured for CN(B 2Σ+, v=0, Ni=0, 4, 6, 7, 8, 11 and 13). All experiments were conducted under single collision conditions in a static cell filled with previously prepared C2N2/He mixtures at various total pressures up to a maximum of 800 mTorr. The above initial states were prepared by pumping CN(X) with a pulsed dye laser tuned to appropriate frequencies in the P-branch of the CN-violet (0,0) band following the production of CN(X) by the excimer laser photolysis of C2N2 at 157 nm. Total RET rate constants and radiative lifetimes were determined from decay constants obtained with a transient digitizer over the above range of cell pressures. State-to-state RET rate constants were obtained from time-averaged fluorescence spectra in the R branch of the (0,0) band of the CN violet system at various cell pressures within the above range. A weak propensity for odd jumps in N was discernab...
Databáze:	OpenAIRE
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