中国物理B ›› 2009, Vol. 18 ›› Issue (7): 3073-3078.doi: 10.1088/1674-1056/18/7/077
陈德应1, 夏元钦1, 张盛2
Chen De-Ying(陈德应)a)† , Zhang Sheng(张盛)a)b), and Xia Yuan-Qin(夏元钦)a)
摘要: Using a neutral N2 beam as target, this paper studies the dissociation of N2+ in intense femtosecond laser fields (45~fs, ~ 1× 1016~W/cm2) at the laser wavelength of 800 nm based on the time-of-flight mass spectra of N+ fragment ions. The angular distributions of N+ and the laser power dependence of N+ yielded from different dissociation pathways show that the dissociation mechanisms mainly proceed through the couplings between the metastable states (A, B and C) and the upper excited states of N2+. A coupling model of light-dressed potential energy curves of N2+ is used to interpret the kinetic energy release of N+.
中图分类号: (Diffuse spectra; predissociation, photodissociation)