Neutron Reflectivity Measurement
نویسندگان
چکیده
منابع مشابه
X-Ray and Neutron Reflectivity
re = 2.818 × 10−15m is the classical electron radius, ρe is the electron density of the material, and μx is the absorption length. With δ > 0 we find that n < 1, which leads to the phenomenon of so-called total external reflection for incident angles αi below the critical angle αc = √ 2δ. Typical values for δ are 10−5 . . . 10−6, and thus αc is in the range of 0.1 ◦ . . . 0.5◦. For simplicity, ...
متن کاملNeutron Reflectivity and Grazing Angle Diffraction
Over the last 10 years, neutron reflectivity has emerged as a powerful technique for the investigation of surface and interfacial phenomena in many different fields. In this paper, a short review of some of the work on neutron reflectivity and grazing-angle diffraction as well as a description of the current and planned neutron rcflectometers at NIST is presented. Specific examples of the chara...
متن کاملSilk layering as studied with neutron reflectivity.
Neutron reflectivity (NR) measurements of ultrathin surface films (below 30 nm) composed of Bombyx mori silk fibroin protein in combination with atomic force microscopy and ellipsometry were used to reveal the internal structural organization in both dry and swollen states. Reconstituted aqueous silk solution deposited on a silicon substrate using the spin-assisted layer-by-layer (SA-LbL) tec...
متن کاملMeasurement and modeling of polarized specular neutron reflectivity in large magnetic fields
The presence of a large applied magnetic field removes the degeneracy of the vacuum energy states for spin-up and spin-down neutrons. For polarized neutron reflectometry, this must be included in the reference potential energy of the Schrödinger equation that is used to calculate the expected scattering from a magnetic layered structure. For samples with magnetization that is purely parallel or...
متن کاملModel-independent inversion of x-ray or neutron reflectivity data
A technique is described for the model-independent analysis of x-ray or neutron reflectivity data. Rather than trying to find just one optimum solution, the idea is to find the set of solutions that are feasible. The approach is based on inversion of the missing phase information using a feasible set approach coupled with a genetic algorithm search for the set of solutions. It does not require ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: hamon
سال: 2009
ISSN: 1349-046X,1884-636X
DOI: 10.5611/hamon.19.1_34