Benjamin N. Eldridge, Ming L. Yu
Review of Scientific Instruments
The velocity dependence of the ionization probability of sputtered O- from chemisorbed oxygen layers on V and Nb is studied. The ionization probability is found to depend on the normal component of the emission velocity, which suggests that the ionization process is an ion-surface interaction and not an ion-atom binary interaction. For v>1×106 cm/sec, the ionization probability shows an exponential dependence on v. However, this velocity dependence fails at lower velocities. ©1981 The American Physical Society.
Benjamin N. Eldridge, Ming L. Yu
Review of Scientific Instruments
Ming L. Yu
Thin Solid Films
Ming L. Yu, N.D. Lang
Physical Review Letters
Ming L. Yu
Physical Review B