We investigate the dissociation dynamics of core-excited O_(2)molecules using a high-resolution energy-resolved electron-ion coincidence experimental setup.The excited cationic states with two valence holes and one Ry...We investigate the dissociation dynamics of core-excited O_(2)molecules using a high-resolution energy-resolved electron-ion coincidence experimental setup.The excited cationic states with two valence holes and one Rydberg electron are created after spectator Auger decay induced by O 1s→(^(4)Σ_(u)^(-))3sσcore excitation in O_(2).From the energy correlation between the kinetic energy of the Auger electron and the ion kinetic energy release,we distinguish several dissociation channels.Rather complex dissociation channels of the spectator Auger final states are disclosed,which can be explained by the increased number of the crossing point due to the existence of Rydberg electron.The quantum system will evolve into different dissociation limits at each crossing point between the potential energy curves.展开更多
Photoelectron diffraction is an effective tool to probe the structures of molecules.The higher the photoelectron kinetic energy is,the higher order the diffraction pattern is disclosed in.Up to date,either the multi-a...Photoelectron diffraction is an effective tool to probe the structures of molecules.The higher the photoelectron kinetic energy is,the higher order the diffraction pattern is disclosed in.Up to date,either the multi-atomic molecule with the photoelectron kinetic energy below 150 e V or the diatomic molecule with 735 eV photoelectron has been experimentally reported.In this study,we measured the diffraction pattern of C 1 s and O 1 s photoelectrons in CO_(2)with 319.7 and 433.5 eV kinetic energies,respectively.The extracted C–O bond lengths are longer than the C–O bond length at the ground state,which is attributed to the asymmetric fragmentation that preferentially occurs at the longer chemical bond side during the zero-energy asymmetric vibration.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.11574020)the Project of Thousand Youth Talents in Chinathe Starting Grant of ShanghaiTech University。
文摘We investigate the dissociation dynamics of core-excited O_(2)molecules using a high-resolution energy-resolved electron-ion coincidence experimental setup.The excited cationic states with two valence holes and one Rydberg electron are created after spectator Auger decay induced by O 1s→(^(4)Σ_(u)^(-))3sσcore excitation in O_(2).From the energy correlation between the kinetic energy of the Auger electron and the ion kinetic energy release,we distinguish several dissociation channels.Rather complex dissociation channels of the spectator Auger final states are disclosed,which can be explained by the increased number of the crossing point due to the existence of Rydberg electron.The quantum system will evolve into different dissociation limits at each crossing point between the potential energy curves.
基金Supported by the National Natural Science Foundation of China(Grant No.11574020)The experiment was performed at the PLEIADES beamline at the SOLEIL Synchrotron,France(Grant No.20130821)。
文摘Photoelectron diffraction is an effective tool to probe the structures of molecules.The higher the photoelectron kinetic energy is,the higher order the diffraction pattern is disclosed in.Up to date,either the multi-atomic molecule with the photoelectron kinetic energy below 150 e V or the diatomic molecule with 735 eV photoelectron has been experimentally reported.In this study,we measured the diffraction pattern of C 1 s and O 1 s photoelectrons in CO_(2)with 319.7 and 433.5 eV kinetic energies,respectively.The extracted C–O bond lengths are longer than the C–O bond length at the ground state,which is attributed to the asymmetric fragmentation that preferentially occurs at the longer chemical bond side during the zero-energy asymmetric vibration.
