Scandium containing multilayers have been produced with very high reflectivity in the soft x-ray spectrum. Accurate optical constants are required in order to model the multilayer reflectivity. Since there are relatively few measurements of the optical constants of Scandium in the soft x-ray region we have performed measurements over the energy range of 50-1,300 eV. Thin films of Scandium were ...

PURPOSE To analyze the postbrachytherapy ultrasonographic dynamics of uveal melanoma tumor height and internal reflectivity. DESIGN Prospective, comparative, observational case series. PARTICIPANTS One hundred forty-seven patients (147 eyes) with posterior uveal melanoma having a mean age of 61 years (range, 29-97 years) who were treated with Ruthenium 106 brachytherapy. METHODS Patients ...

We have studied the ultrafast optical response of native-oxide terminated Si~001! with pump-probe reflectivity using 800 nm, 28 fs pulses at an excitation density of (5.560.3)310 cm. Time-dependent reflectivity changes comprise third-order-response coherent-transient variations arising from anisotropic state filling and linear-response variations arising from excited free carriers, state fillin...

Gallium metallic photonic crystals with 100% filling factor have been fabricated via infiltration of liquid gallium into opals of 300-nm silica spheres using a novel high pressure–high temperature technique. The electrical resistance of the Ga-opal crystals was measured at temperatures from 10 to 280K. The data obtained show that Ga-opal crystals are metallic network with slightly smaller tempe...

The development and application of techniques that allow to study and to understand the features of precipitations from remote sensing data have been an important object in a number of research. In the radar applications, a basic relation between the reflectivity of the radar and the rain rate must be defined for the region to be studied, that is the conversion of the radar reflectivity in rain...

An algorithm was developed to estimate aerosol optical depth (AOD) from geostationary satellite data. The 6S radiative transfer computer code was employed to generate a look-up table (LUT) which incorporates several combinations of satellite-derived variables including earthatmospheric reflectivity, atmospheric reflectivity and surface albedo. The parameterization of the satellite-derived atmos...

In this work, low-energy electron microscopy is employed to probe structural as well as electronic information in few-layer WSe 2 on epitaxial graphene on SiC. The emergence of unoccupied states in the WSe 2 –graphene heterostructures are studied using spectroscopic low-energy electron reflectivity. Reflectivity minima corresponding to specific WSe 2 states that are localized between the monola...

The reflectivity spectra of single cry~tal~ of (ET )iHg,Ix and jd~-ET)iHgilx were studied. In contrast with earlier studied clorineand brominemercur~lte compounds of the series (ET jjHg, ~-Xz IX Cl, Br, I), the spectra of iodinemercurate compounds exhibit low reflectivity without well-defined plasma edge and without electron-vibrational bonds in the region 1000400 cm '. The latter fact may be d...

The reflected signature of an optical fiber Bragg grating is analyzed using the transfer function method. This approach is capable to cast all relevant quantities into proper places and provides a better physical understanding. The relationship between reflected signal, number of periods, index of refraction, and reflected wave phase is elucidated. The condition for which the maximum reflectivi...

For many users of the neutron and X-ray reflectometry instruments at NIST, these measurements represent a relatively small and specialized part of their research portfolio. As such, providing calculation and modeling tools that are as accessible and easy-to-use as possible is a high priority of the facility. In order to meet this need, a purely web-browser-based calculator for reflectivity mode...