中国物理B ›› 2004, Vol. 13 ›› Issue (9): 1564-1568.doi: 10.1088/1009-1963/13/9/035
李霞, 任海振, 马日, 陈建新, 杨宏, 龚旗煌
Li Xia (李霞), Ren Hai-Zhen (任海振), Ma Ri (马日), Chen Jian-Xin (陈建新), Yang Hong (杨宏), Gong Qi-Huang (龚旗煌)
摘要: Femtosecond laser-induced dissociation and Coulomb explosion of polyatomic molecule C_2H_6 were systematically investigated using a time-of-flight mass spectrometer and a chirped pulse amplifier laser. With the laser intensity varying from 2.4×10^{15}W/cm^{2} to 1.2×10^{16}W/cm^2, strong molecular ions C_2H_n^+ (n=0-6) and atomic ions C^{m+} (m=1-3) signals were observed. The double-peak structure of atomic ions indicated the occurrence of Coulomb explosion. Compared with the nearly isotropic distribution of C^{+}, highly charged ions C^{m+} (m=2-3) exhibited a sharply anisotropic angular distribution, which was attributed to the geometric alignment.
中图分类号: (Diffuse spectra; predissociation, photodissociation)