In the study of dissociation or ionization process of atoms and molecules induced by electron, photon, or ion beams, if the momentum of the n-1 particles can be determined among the total n particles after interaction...In the study of dissociation or ionization process of atoms and molecules induced by electron, photon, or ion beams, if the momentum of the n-1 particles can be determined among the total n particles after interaction, the differential cross section can be deduced. Position sensitive detector with microchannel plate and standard helical wire delay line anode (DHL) is used to determine the momenta of the n-1 particles in reaction microscope. :展开更多
The principle and technique details of recoil ion momentum imaging are discussed and summarized. The recoil ion momentum spectroscopy built at the Institute of Modern Physics (Lanzhou) is presented. The first results ...The principle and technique details of recoil ion momentum imaging are discussed and summarized. The recoil ion momentum spectroscopy built at the Institute of Modern Physics (Lanzhou) is presented. The first results obtained at the setup are analyzed. For 30 keV He2+ on He collision, it is found that the capture of single electron occurs dominantly into the first excited states, and the related scattering angle results show that the ground state capture occurs at large impact parameters, while the capture into excited states occurs at small impact parameters. The results manifest the collision dynamics for the sub-femto-second process can be studied through the techniques uniquely. Finally, the future possibilities of applications of the recoil ion momentum spectroscopy in other fields are outlined.展开更多
基金Supported by the National Natural Science Foundation of China
文摘In the study of dissociation or ionization process of atoms and molecules induced by electron, photon, or ion beams, if the momentum of the n-1 particles can be determined among the total n particles after interaction, the differential cross section can be deduced. Position sensitive detector with microchannel plate and standard helical wire delay line anode (DHL) is used to determine the momenta of the n-1 particles in reaction microscope. :
基金the National Natural Science Foundation of China (Grant No. 10434100)
文摘The principle and technique details of recoil ion momentum imaging are discussed and summarized. The recoil ion momentum spectroscopy built at the Institute of Modern Physics (Lanzhou) is presented. The first results obtained at the setup are analyzed. For 30 keV He2+ on He collision, it is found that the capture of single electron occurs dominantly into the first excited states, and the related scattering angle results show that the ground state capture occurs at large impact parameters, while the capture into excited states occurs at small impact parameters. The results manifest the collision dynamics for the sub-femto-second process can be studied through the techniques uniquely. Finally, the future possibilities of applications of the recoil ion momentum spectroscopy in other fields are outlined.
