M.P. Petkov, C.L. Wang, et al.
Journal of Physical Chemistry B
Using metal-oxide-semiconductor (MOS) structures, the shift of centroid (peak) of γ-ray energy distributions emitted from positron annihilation has been measured as a function of incident positron energy. The Doppler centroid shift was found to be consistent with the positron motion in the MOS depletion region. The results are described by a one-dimensional positron diffusion model, and provide information on "effective" positron diffusion length under applied field.
M.P. Petkov, C.L. Wang, et al.
Journal of Physical Chemistry B
T.C. Leung, Z.A. Weinberg, et al.
Journal of Applied Physics
R. Mayer, C.S. Zhang, et al.
Physical Review B
P. Asoka-Kumar, T.C. Leung, et al.
Journal of Applied Physics