Irradiation of the pulsed laser light at 248 nm to the gaseous mixture of OCS and He generated vibrationally excited ${\text{S}}_2(\text{a}{}^1{\mathrm{\Delta }}_{\text{g}}\text{,}\mathsf{v}=2-4)$ by the S(¹D) + OCS reaction. A single vibrational level of S₂(a¹Δ_g)${\text{S}}_2(\text{a}{}^1{\mathrm{\Delta }}_{\text{g}})$ was detected with laser-induced fluorescence (LIF) via the f¹Δ_u-a¹Δ_g$\text{f}{}^1{\mathrm{\Delta }}_{\text{u}}-\text{a}{}^1{\mathrm{\Delta }}_{\text{g}}$ transition. The rate coefficients for energy transfer from vibrational levels v=2$\mathsf{v}=2$ and 3 of S₂(a¹Δ_g)${\text{S}}_2(\text{a}{}^1{\mathrm{\Delta }}_{\text{g}})$ to SF₆ and CF₄ have been determined from the time-resolved LIF intensities recorded at varying pressures of SF₆ and CF₄. The reduced probability of energy transfer per collision derived from the rate coefficients enabled us to identify the ν₄ mode of SF₆ and CF₄ as the energy-accepting vibration.

中文翻译：

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S的振动弛豫₂（A ^1个Δ_克由具有SF碰撞）₆和CF ₄

将248 nm的脉冲激光照射到OCS和He的气态混合物中会产生振动激发 ${\text{小号}}_{\mathrm{2个}}（\text{一个}{}^{\mathrm{1个}}{\mathrm{\Delta }}_{\text{G}}\text{，}\mathsf{v}=\mathrm{2个}--4）$通过S（¹ D）+ OCS反应。的单个振动能级小号₂（A ^1个Δ_克）${\text{小号}}_{\mathrm{2个}}（\text{一个}{}^{\mathrm{1个}}{\mathrm{\Delta }}_{\text{G}}）$经由激光诱发荧光（LIF）检测˚F ¹ Δ _ù -a ¹ Δ_克$\text{F}{}^{\mathrm{1个}}{\mathrm{\Delta }}_{\text{ü}}--\text{一个}{}^{\mathrm{1个}}{\mathrm{\Delta }}_{\text{G}}$过渡。从振动水平v = 2进行能量传递的速率系数$\mathsf{v}=\mathrm{2个}$和的3小号₂（A ^1个Δ_克）${\text{小号}}_{\mathrm{2个}}（\text{一个}{}^{\mathrm{1个}}{\mathrm{\Delta }}_{\text{G}}）$于SF ₆和CF ₄已经从记录在SF的变化的压力的时间分辨LIF强度确定₆和CF ₄。每从速率系数导出碰撞能量传递的可能性降低，使我们能够识别ν ₄ SF的模式₆和CF ₄作为接受能振动。