Time-dependent approach to the double-channel dissociation of NaCs molecule induced by pulsed lasers

ZHANG Caixia; NIU Yuquan; MENG Qingtian

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Time-dependent approach to the double-channel dissociation of NaCs molecule induced by pulsed lasers

ZHANG Caixia,NIU Yuquan,MENG Qingtian *

College of Physics and Electronics, Shandong Normal University, Jinan, Shandong 250014

*Correspondence author

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Funding: Project supported by the National Natural Science Foundation of China （No.Grant No. 11074151) and the Doctoral Program Foundation of Institutions of Higher Education of China）

Opened online:24 January 2014

Accepted by: none

Citation: ZHANG Caixia,NIU Yuquan,MENG Qingtian.Time-dependent approach to the double-channel dissociation of NaCs molecule induced by pulsed lasers[OL]. [24 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4582878

We investigated the dynamics of the double-channel dissociation of NaCs molecule using the time-dependent wave packet method and the "split operator-Fourier transform" wave packet propagation scheme. At given wavelength and intensity of laser pulse, the population of each state changing with time is given. The photo-absorption spectra and kinetic-energy distribution of the dissociation fragments, which exhibit vibration-level structure and dispersion of the wave packet, respectively, are also obtained. The results show that with increasing the laser intensity, one can find not only the band center shift of the photo-absorption spectrum, but also the change of the fragment energy. The appearance of the diffusive band in the photo-absorption spectrum and the multiple peaks in the kinetic-energy spectrum can be attributed to the effects of the pre-dissociation limit and the external field.

Keywords:time-dependent wave packet method; photo-dissociation dynamics, photo- absorption spectrum;kinetic-energy spectrum;NaCs

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