<s>
Anomalous	B-Algorithm
diffraction	I-Algorithm
theory	I-Algorithm
(	O
also	O
van	O
de	O
Hulst	O
approximation	O
,	O
eikonal	O
approximation	O
,	O
high	O
energy	O
approximation	O
,	O
soft	O
particle	O
approximation	O
)	O
is	O
an	O
approximation	O
developed	O
by	O
Dutch	O
astronomer	O
van	O
de	O
Hulst	O
describing	O
light	O
scattering	O
for	O
optically	O
soft	O
spheres	O
.	O
</s>
<s>
The	O
anomalous	O
diffraction	O
approximation	O
offers	O
a	O
very	O
approximate	O
but	O
computationally	O
fast	O
technique	O
to	O
calculate	O
light	B-Algorithm
scattering	I-Algorithm
by	I-Algorithm
particles	I-Algorithm
.	O
</s>
