1205.3946 (Seyed Farhad Masoudi et al.)

One directional Polarized Neutron Reflectometry with optimized reference
layer method    [PDF]

Seyed Farhad Masoudi, Saeed S. Jahromi

In the past decade, several neutron reflectometry methods for determining the modules and phase of complex reflection coefficient of an unknown multilayer thin film have been worked out among which the method of variation of surroundings and reference layers are of highest interest. These methods were later modified for measurement of polarization of reflected beam instead of the measurement of intensities. In their new architecture, these methods not only suffered from the necessity of change of experimental setup, but also another difficulty was added to their experimental implementations which was related to the limitations of the technology of the neutron reflectometers that could only measure the polarization of the reflected neutrons in the same direction as the polarization of the incident beam. As the instruments are limited, the theory has to be optimized so that the experiment could be performed. In a recent work, we have developed the method of variation of surroundings for one directional polarization analysis. In this new work, the method of reference layer with polarization analysis has been optimized to determine the phase and modules of the unknown film with measurement of the polarization of reflected neutrons in the same direction as the polarization of the incident beam.

View original: http://arxiv.org/abs/1205.3946