飞秒泵浦探测实验中量子拍频现象的数据处理  

Data Fit and Analysis for Pump-probe Experiment with Femtosecond Pulses Based on LabVIEW *

作　　者：袁丽威[1] 王利[1] 白吉玲[1] 

机构地区：[1]中国科学院大连化学物理研究所,分子反应动力学国家重点实验室,大连116023

出　　处：《Chinese Journal of Chemical Physics》2005年第1期4-8,共5页化学物理学报（英文）

基　　金：ProjectsupportedbytheNationalScienceFoundationofChina(20003012;20273072)NationalKeyBasicResearchSpecialFunds(G1999075301)andKnowledgeInnovationProgramoftheChineseAcademyofSciences(K2002F2)

摘　　要：应用飞秒时间分辨的泵浦 探测技术结合飞行时间质谱的方法研究1,3 二氯苯分子光解离动力学过 程.对于泵浦 探测数据中的指数衰减过程及量子拍频现象选择合适的模型进行拟合,得到正确的光解动力学信 息.采用图形化编程语言LabVIEW编写程序,其中调用了LabVIEW数学分析程序包中的卷积、去卷积及Leven bergMarquardt最小二乘法拟合子程序等模块,对实验数据进行了处理,得到1,3 二氯苯的第一激发态S1的寿命. 同时也对反映量子相干现象的数据进行拟合,得到量子拍频的频率.The pump-probe experiments for 1,3-dichlorobenzene in gas phase have been performed by femtosecond multiphoton ionization mass spectra at a pump pulse of 270 nm and a probe pulse of 810 nm by using our homebuilt femtosecond laser system. The models for the exponential process and quantum beat are presented to extract the photodissociation dynamics information from the data. A fitting and analyzing software which is programmed by graphical language LabVIEW has been developed for the experimental data. The Convolution, Levenberg Marquardt, and Deconvolution mathematics VIs of LabVIEW are used in this program to make the program much simpler than using other programming languages. The experimental data have been well fitted with this program. The results provide the lifetime of excited-state S, and the frequency of quantum beat.

关 键 词：飞秒 泵浦探测 量子拍频 数据拟合 LABVIEW 

分 类 号：O621.1[理学—有机化学]