Observing interference effect in binary (e, 2e) of molecules

International Conference on Many Particle Spectroscopy of Atoms, Molecules, Clusters and Surfaces 2014

Chen, Xiangjun^1,2 ; Yang, Jing^1,2 ; Shan, Xu^1,2 ; Zhang, Zhe^1 ; Tian, Qiguo^1 ; Wang, Enliang^1,2

Hefei National Laboratory for Physical Sciences at Microscale, Department of Modem Physics, University of Science and Technology of China, Hefei, Anhui

230026, China^1

Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui

230026, China^2

关键词: Electron momentum spectroscopy;    Franck-Condon principle;    High-energy resolution;    Interference effects;    Ionization transitions;    Oscillation periods;    Two-center interference;    Vibrational state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/601/1/012002/pdf
DOI  :  10.1088/1742-6596/601/1/012002

来源: IOP

【 摘 要 】

We present investigations on the two-center and multi-center interference effects of molecules in binary (e, 2e) experiments. The high energy resolution electron momentum spectroscopy (EMS) measurements on H2are reported with final vibrational states resolved. The experimental momentum profiles for ionization transitions to the individual final vibrational states of the ion are obtained. The measured and calculated vibrational ratios of the cross sections deviate from Franck-Condon principle, which can be ascribed to the Young-type two-center interference. Furthermore, with the help of our latest version of EMS spectrometer which has considerably higher sensitivity and much wider momentum range from 0 to 8 a.u., we are able to extend our observations to multi-center interference effect in high symmetry molecules like NF3and CF4with several oscillation periods included.