Brand: WissEl | Category: Nanotechnology
WinNormos-for-Igor tackles almost all the common problems met in Mossbauer spectroscopy, bringing the old DOS Normos Site and Dist routines together in one package that runs inside the Igor graphing and analysis programme from WaveMetrics. All Mossbauer isotopes can be selected at run time, most of them predefined, and the static Hamiltonian is solved exactly for any isotope, with true transmission integral fits and automatic folding for triangular or sinusoidal velocity. WinSite treats a discrete set of subspectra while WinDist handles distributions in hyperfine field, quadrupole splitting or isomer shift, including correlation effects, Gaussian and Voigt distribution profiles and polarised source experiments with spin texture evaluation. Velocity calibration can be taken from WissEl laser drive files, workspaces are stored and recovered as Igor experiments with all numerical results, and reports can be generated automatically in Rich Text Format.
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Correlate lets Raman results be compared against images from many other microscopy systems, among them scanning electron microscopy (SEM), fluorescence, atomic force microscopy (AFM), infra-red and optical microscopes. You record the coordinates of three or more reference points and data acquisition points on the sample, and the module then guides you back to the same regions of interest once the sample has been transferred between microscopes. A Coordinate Manager imports and transforms coordinates from commonly used microscopy systems, while an Image Alignment Tool gives translation, rotation, sizing and aspect ratio control for overlay at variable transparency. Batch measurements automate the same Raman measurement at different positions on a sample.
SITE-A is the SITE Mossbauer fit programme purchased together with a WissEl Mossbauer system. Its fitting capability matches the standalone SITE licence; only the terms of supply differ.
Cosmic rays are high energy particles from outer space, and over a long measurement they leave spurious spikes in Raman spectra. Renishaw's Cosmic Ray Remover (CRR) tool in WiRE software deals with them either as the data is collected or afterwards. Acquiring three accumulations and taking the median value at each frequency eliminates spikes during collection, while a simple zap function or the automated CRR processing tool handles files that already contain many features. Removing the spikes preserves spectral band shape, leaves images free of artefacts and gives more confidence when unsupervised chemometric methods such as PCA are applied.