Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan.
J Phys Chem A. 2010 Jan 21;114(2):735-40. doi: 10.1021/jp908904f.
The vibrational levels of O2(X3Sigma(g)-) generated in the ultraviolet photolysis of O3 at 266 nm were detected via laser-induced fluorescence (LIF) of the B3Sigma(u)- - X3Sigma(g)- system. The nascent vibrational energy distributions of O2(X3Sigma(g)-, nu = 6-13) have been measured by two different methods. One is a kinetic analysis based on the originally developed integrated profiles method (IPM). The time-resolved LIF of a single vibrational level has been recorded in the presence of CF4 or O2 as a relaxation partner. The IPM analysis of the profiles gave the relative detectabilities of adjacent vibrational levels, and the initial relative populations of the vibrational levels have been determined from the intensities of LIF subsequent to the photolysis. The other is the analysis of the area intensities of the LIF of the vibrational levels of interest. The rotational levels with the identical quantum numbers of different vibrational levels in the X3Sigma(g)- state were excited to a common vibrational level nu' = 0 in the B3Sigma(u)- state. Correction for the LIF intensities with the Franck-Condon factors was made, and the initial relative populations have been obtained. The two different methods have given similar nascent vibrational energy distributions, and comparison to the previous reports has been made.
采用激光诱导荧光（LIF）技术，探测到了在 266nm 紫外光解 O3 过程中产生的 O2（X3Σg-）的振动能级。通过两种不同的方法测量了 O2（X3Σg-，ν=6-13）的初生振动能量分布。一种是基于原始开发的积分轮廓法（IPM）的动力学分析。在 CF4 或 O2 作为弛豫伙伴存在的情况下，记录了单个振动能级的时间分辨 LIF。对轮廓的 IPM 分析给出了相邻振动能级的相对探测率，并且从光解后 LIF 的强度确定了振动能级的初始相对布居数。另一种是分析感兴趣的振动能级的 LIF 面积强度。X3Σg-态中具有相同量子数的不同振动能级的转动能级被激发到 B3Σu-态中的共同振动能级 nu'=0。通过 Franck-Condon 因子对 LIF 强度进行了校正，并得到了初始相对布居数。这两种不同的方法给出了相似的初生振动能量分布，并与以前的报告进行了比较。
