TY  - JOUR
AU  - Adlmann, Franz A
AU  - Herbel, Jörg
AU  - Korolkovas, Airidas
AU  - Bliersbach, Andreas
AU  - Toperverg, Boris
AU  - Van Herck, Walter
AU  - Pálsson, Gunnar K
AU  - Kitchen, Brian
AU  - Wolff, Max
TI  - Depth resolved grazing incidence neutron scattering experiments from semi-infinite interfaces: a statistical analysis of the scattering contributions
JO  - Journal of physics / Condensed matter
VL  - 30
IS  - 16
SN  - 0953-8984
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2019-02085
SP  - 165901 -
PY  - 2018
AB  - Grazing incidence neutron scattering experiments offer surface sensitivity by reflecting from an interface at momentum transfers close to total external reflection. Under these conditions the penetration depth is strongly non-linear and may change by many orders of magnitude. This fact imposes severe challenges for depth resolved experiments, since the brilliance of neutron beams is relatively low in comparison to e.g. synchrotron radiation. In this article we use probability density functions to calculate the contribution of scattering at different distances from an interface to the intensities registered on the detector. Our method has the particular advantage that the depth sensitivity is directly extracted from the scattering pattern itself. Hence for perfectly known samples exact resolution functions can be calculated and visa versa. We show that any tails in the resolution function, e.g. Gaussian shaped, hinders depth resolved experiments. More importantly we provide means for a descriptive statistical analysis of detector images with respect to the scattering contributions and show that even for perfect resolution near surface scattering is hardly accessible.
LB  - PUB:(DE-HGF)16
C6  - pmid:29521272
UR  - <Go to ISI:>//WOS:000428466400001
DO  - DOI:10.1088/1361-648X/aab573
UR  - https://juser.fz-juelich.de/record/861639
ER  -