  The characteristic of the angular distributions of accelerated Bose-Einstein
condensate (BEC) atoms incidence on the surface is designed using the
mathematical modeling method. Here, we proposed the idea to study the
retroreflection and diffraction of a BEC from an evanescent standing wave
potential (ESWP). The ESWP is formed by multiple reflections of the laser beam
from the surface of the prism under the influence of gravity. After BEC's
reflection and diffraction, the so-called BEC's density rainbow patterns
develop due to the interference which depends on the surface structure which we
model with the periodic decaying evanescent field. The interaction of
accelerated bosonic atoms with a surface can help to demonstrate surface
structures or to determine surface roughness, or to build future high spatial
resolution and high sensitivity magnetic-field sensors in two-dimensional
systems.
