Molecular photoelectron momentum and angular distributions of N₂ molecules by ultrashort attosecond laser pulses

【摘要】 The ultrafast photoionization dynamics of N₂ molecules by x-ray/XUV laser pulses is investigated.The molecular frame photoelectron momentum distributions（MF-PMDs） and the molecular frame photoelectron angular distributions（MF-PADs） are obtained by numerically solving 2 D time-dependent Schrodinger equations within the single-electron approximation（SEA） frame.The results show that the molecular photoionization diffraction appears in 5 nm laser fields.However,when the laser wavelength is 30 nm,the molecular photoionization diffraction disappears and the MF-PMDs show four-lobe pattern.The ultrafast photoionization model can be employed to describe the MF-PMDs and MF-PADs of N₂ molecules.更多还原

【Abstract】 The ultrafast photoionization dynamics of N₂ molecules by x-ray/XUV laser pulses is investigated.The molecular frame photoelectron momentum distributions（MF-PMDs） and the molecular frame photoelectron angular distributions（MF-PADs） are obtained by numerically solving 2 D time-dependent Schrodinger equations within the single-electron approximation（SEA） frame.The results show that the molecular photoionization diffraction appears in 5 nm laser fields.However,when the laser wavelength is 30 nm,the molecular photoionization diffraction disappears and the MF-PMDs show four-lobe pattern.The ultrafast photoionization model can be employed to describe the MF-PMDs and MF-PADs of N₂ molecules.更多还原