National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [20633070]
机构署名：
本校为第一且通讯机构
院系归属：
电气工程学院
核科学技术学院
摘要：
We experimentally measure the kinetic energy and angular distributions of photoelectrons of N2 as a function of 410 nm femtosecond laser intensity by using velocity map imaging technique. The strong-field multiphoton ionization of molecules shares many of the characteristics with those of atoms. Electron kinetic energies are nearly independent of laser intensities. The independence suggests that the electron peaks in the photoelectron spectrum actually result from a two-step process, indicative of the occurrence of real population in the intermediate states. The relative amplitudes of electron...
