Thermal and cold neutron phase-contrast radiography.
In this paper, we will discuss a phase-contrast imaging method that avoids the complications of interferometry to provide phase contrast in weakly absorbing samples. A transversely coherent neutron beam is used with the traditional radiography scheme. Images taken with this scheme show dramatic intensity variations due to sharp changes in the neutron wave refractive index. With some numerical processing these images may be used to reconstruct a quantitative phase radiograph of specimens imaged with this technique.
Jacobson
D L
DL
NIST Center for Neutron Research, 100 Burwau Drive, Bldg. 235 RM B-185, Gaithersburg, MD 20899-8461, USA. david.jacobson@nist.gov
Allman
B E
BE
McMahon
P J
PJ
Nugent
K A
KA
Paganin
D
D
Arif
M
M
Werner
S A
SA