Standing waves and reflectivity from ultrathin layer
M. A. Andreeva, B. Lindgren+
Department of Physics, M. V. Lomonosov Moscow State University, 117234 Moscow, Russia
+Department of Physics, Uppsala University, 75121 Uppsala, Sweden
PACS: 61.10.Kw, 68.49.Uv, 76.80.+y
Abstract
We have analytically found that the reflectivity amplitude from
one thin layer in the presence of the other reflecting layers is modulated by
the squared amplitude of the radiation field but not by the first order
amplitude as it was supposed in the paper of R. Röhlsberger (Hyperfine
Interactions 123/124, 455 (1999)) for the delayed nuclear resonance
reflectivity. Hence, a larger sensitivity to the standing waves is expected
for the reflectivity signal from selected groups of atoms or nuclei compared
with the secondary radiation emission.