Observation of many coherent oscillations for MeV protons transmitted through stacking faults.
High spatial resolution, high-contrast transmission channeling images of stacking faults in silicon have been produced using a beam of 2 MeV protons focused to a spot size of 60 nm. Over a narrow range of beam tilts to the (011) planes, up to ten periodic intensity oscillations are observed, providing evidence of a long-range coherency of the planar channeled trajectories. This behavior is characterized using Monte Carlo computer simulations, and a phase-space model of planar channeled ion interactions with stacking faults is developed which incorporates all observed channeling and blocking phenomena.
Breese
M B H
MB
Physics Department, National University of Singapore, 10 Lower Kent Ridge Road, Singapore 119260.
Teo
E J
EJ
Rana
M A
MA
Huang
L
L
van Kan
J A
JA
Watt
F
F
King
P J C
PJ