PHOTOFRAGMENTATION OF CLNO IN THE A-BAND : VELOCITY DISTRIBUTION AND FINE-STRUCTURE BRANCHING RATIO OF CL(2PJ) ATOMS
PHOTOFRAGMENTATION OF CLNO IN THE A-BAND : VELOCITY DISTRIBUTION AND FINE-STRUCTURE BRANCHING RATIO OF CL(2PJ) ATOMS
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DOI：
10.1021/jp9535708
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
V. Skorokhodov;Yoshihiro Sato;K. Suto;Y. Matsumi;M. Kawasaki
中科院分区：
文献类型：
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作者：
V. Skorokhodov;Yoshihiro Sato;K. Suto;Y. Matsumi;M. Kawasaki
利用光刻成像光谱和真空紫外激光诱导荧光研究了ClNO在211 ~ 248 nm区域的光解作用。根据初生Cl（2P3/2）和Cl*(2P1/2)原子图像的结构，导出了碎片总平动能分布和各向异性参数。在235 nm附近，碎片平动能分布呈现明显的双峰形状。对于Cl和Cl*两种不同的产品，慢速组分和快速组分的相对强度是不同的。Cl*分布分量和Cl态主慢分量的各向异性参数β分别为1.5±0.2和1.8±0.2。在λ = 213、235和248 nm处，Cl*/Cl分支比分别为0.93±0.10、0.45±0.05和1.08±0.12。目前的结果提供了在靠近平衡位置的核间距离上由于避免交叉和在大片段间分离时分子分裂的强烈影响的证据。
The photodissociation of ClNO in the 211−248 nm region has been studied by using photofragment imaging spectroscopy and vacuum ultraviolet laser-induced fluorescence. From the structure of the images of the nascent Cl(2P3/2) and Cl*(2P1/2) atoms, a fragment total translational energy distribution and an anisotropy parameter were derived. Near 235 nm the fragment translational energy distributions exhibit a distinctly bimodal shape. Relative intensities of the slow and fast components vary for two different products, Cl and Cl*. Both components of the Cl* distribution and the major slow component of the Cl state have the anisotropy parameter β = 1.5 ± 0.2 and 1.8 ± 0.2, respectively. The Cl*/Cl branching ratios are 0.93 ± 0.10, 0.45 ± 0.05, and 1.08 ± 0.12 at λ = 213, 235, and 248 nm. The present results provide evidence of strong effects during molecule fragmentation both at internuclear distances close to the equilibrium position due to avoided crossing and at large interfragment separations.