CAJ | 학술논문

受激发射泵浦激发K2到X1Σg+(v″=40,53)振动态． K2(v″)与CO2碰撞,瞬时泛频激光诱导荧光(LIF)测得CO2(0000,J)的初生态布居,其半对数描绘给出了双指数分布．在池温为600 K时,对于v″=40和53,低转动温度T,分别为581±70 K与621±76 K,而高转动温度分别为1395±167 K与1556±187 K． T1和T2分别对应于弱碰撞和强碰撞．转动分布对K2( v″)的能量是敏感的,但弱,强碰撞分支比基本相同．利用瞬时泛频LIF强度的相对变化,得到CO2 J态的出现和倒空速率系数．确定了CO2平均角动量改变<ΔJ>和平均反冲速度改变<Δvrel >间的关系．对于相同角动量的改变,K2( v″)能量增加25%,反冲速度增加约47%．对于K2(v″=40,53)- CO2碰撞,得到了能量转移概率分布函数P(ΔE)．
수격발사빙포격발K2도X1Σg+(v″=40,53)진동태． K2(v″)여CO2팽당,순시범빈격광유도형광(LIF)측득CO2(0000,J)적초생태포거,기반대수묘회급출료쌍지수분포．재지온위600 K시,대우v″=40화53,저전동온도T,분별위581±70 K여621±76 K,이고전동온도분별위1395±167 K여1556±187 K． T1화T2분별대응우약팽당화강팽당．전동분포대K2( v″)적능량시민감적,단약,강팽당분지비기본상동．이용순시범빈LIF강도적상대변화,득도CO2 J태적출현화도공속솔계수．학정료CO2평균각동량개변<ΔJ>화평균반충속도개변<Δvrel >간적관계．대우상동각동량적개변,K2( v″)능량증가25%,반충속도증가약47%．대우K2(v″=40,53)- CO2팽당,득도료능량전이개솔분포함수P(ΔE)．
By using a stimulated emission pumping technique, highly vibrationally excited K2 X1Σg+(v″=40,53) states are obtained. The full states-resolved distribution of scattered CO2 (0000,J) molecules from collisions with K2(v″) is reported. The nascent CO2(0000,J) populations are obtained from transient overtone laser in-duced fluorescence line intensity. The semilog plot of the rotational distribution showed the biexponential distri-bution. For K2(v″=40) +CO2 at 600 K, the data set yield low and high-temperature distributions with T1 =581 ± 70 K and T2 =1395 ± 167 K, respectively. T1 corresponds to a weak collision and T2 is associated with a strong collisions. For K2(v″=53), T1 =621 ± 76 K and T2 =1556 ± 187 K have been obtained. The spread of the rotational distribution is sensitive to K2 energy, but the branching ratios for both the weak and strong colli-sions are the same for the K2 energy. The relative changes of the transient overtone LIF intensities yield appear-ance and depletion rate constants. The correlation between the average change in angular momentum <ΔJ> of CO2 and the average change of recoil velocity <Δvrel > are determined. By increasing the K2 ( v″) energy by 25%, the recoil velocities increase by ~47% for the same average changes in CO2 angular momentum. The full energy transfer probability distribution function P(ΔE) for K2 ( v″) - CO2 collisions is presented.