Channeling of Neutrons in a Planar Waveguide

Channeling of Neutrons in a Nonmagnetic Planar Waveguide

“…Recently we obtained experimentally following. The channeling length grows exponentially with the increasing of the upper layer thickness [49,50] and linear with increasing of SLD of outer layers at the fixed SLD of the channel [51] and decreases inversely with increasing of the resonance order [50]. Experimental results proved the theoretical predictions [2].…”

“…The results obtained in [50] for the waveguide structure Ni 67 Cu 33 (20 nm)/Cu(150)/Ni 67 Cu 33 (50)//Si(substrate) are shown in Fig. 6b for explatation of this method.…”

“…Experiment was done using the neutron reflectometer NREX with the horizontal sample plane at the steady state reactor FRM II (MLZ research center, Garching, Germany). The fixed neutron 50)//Si(substrate) with the substrate sizes 25×25×1 mm 3 was investigated in [50].…”

“…Symbols and line corresponds to experiment and calculations respectively. In [26,50] the experimental angular distribution of the microbeam intensity is described by Fourier transformation of the neutron wavefunction inside the waveguide. In Fig.…”

“…The normalized microbeam intensity in the natural logarithm scale vs. the length of non-illuminated part of the sample surface x is shown in Fig. 11 [50]. The channel width is 150 nm.…”