A new and simple model is developed to describe charge transfer,excitation and elastic process in low energy ion-atom collision in which the resonant transfer is considered as the dominant mechanism.The formulas are g...A new and simple model is developed to describe charge transfer,excitation and elastic process in low energy ion-atom collision in which the resonant transfer is considered as the dominant mechanism.The formulas are given in the secondary quantum representation.The cross sections of electron capture,excitation and elastic process in proton-hydrogen atom collision have been calculated and compared with experiment data.展开更多
A crossed-beam facility for electron impact ionization of ions was constructed.The absolute cross sections for single ionization of Ar^(+) and Cl^(+) ions at electron energies ranging from 30 to 500eV were measured.Th...A crossed-beam facility for electron impact ionization of ions was constructed.The absolute cross sections for single ionization of Ar^(+) and Cl^(+) ions at electron energies ranging from 30 to 500eV were measured.The uncertainty is about±13%.展开更多
With a 30 keV mini-separator at the accelerator laboratory of Fudan University,we have successfully obtained about 1 nA fullerene ion bea.m.Under the same conditions,we have also observed the fragment ions C_(n)^(+) (...With a 30 keV mini-separator at the accelerator laboratory of Fudan University,we have successfully obtained about 1 nA fullerene ion bea.m.Under the same conditions,we have also observed the fragment ions C_(n)^(+) (n=20-40).The C_(60)^(+) (C_(70)^(+)) beams will be used study collision between fullerene and electrons,atoms and photons.展开更多
By using the principle of detailed balance, the thermonuclear reaction rates for the 28Si (α , p ) 31p reaction were evaluated from the 31p ( p ,α ) 28Si resonance parameters. The reaction rates vary from 1.75x10-1 ...By using the principle of detailed balance, the thermonuclear reaction rates for the 28Si (α , p ) 31p reaction were evaluated from the 31p ( p ,α ) 28Si resonance parameters. The reaction rates vary from 1.75x10-1 to 1.08 x104 in the region T9=2-5, which agree with the theoretical predictions.展开更多
基金Supported by the National Natural Science Foundation of China.
文摘A new and simple model is developed to describe charge transfer,excitation and elastic process in low energy ion-atom collision in which the resonant transfer is considered as the dominant mechanism.The formulas are given in the secondary quantum representation.The cross sections of electron capture,excitation and elastic process in proton-hydrogen atom collision have been calculated and compared with experiment data.
基金the National Natural Science Foundation of Chinapartially by YOK YING TONG Educational Foundation.
文摘A crossed-beam facility for electron impact ionization of ions was constructed.The absolute cross sections for single ionization of Ar^(+) and Cl^(+) ions at electron energies ranging from 30 to 500eV were measured.The uncertainty is about±13%.
文摘With a 30 keV mini-separator at the accelerator laboratory of Fudan University,we have successfully obtained about 1 nA fullerene ion bea.m.Under the same conditions,we have also observed the fragment ions C_(n)^(+) (n=20-40).The C_(60)^(+) (C_(70)^(+)) beams will be used study collision between fullerene and electrons,atoms and photons.
文摘By using the principle of detailed balance, the thermonuclear reaction rates for the 28Si (α , p ) 31p reaction were evaluated from the 31p ( p ,α ) 28Si resonance parameters. The reaction rates vary from 1.75x10-1 to 1.08 x104 in the region T9=2-5, which agree with the theoretical predictions.
