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This community features research by faculty members in the Department of Physics and Astronomy at Washington State University.
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Collins, Gary S.
This community contains research materials created by Gary Collins, professor in the Department of Physics and Astronomy at Washington State University.
Recent Submissions
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Research Group Data Archive, 1985-2018
(2018-09)Included here are two parallel archives, one of raw spectral DATA and the other of spectral ANALYSIS. There is a small number of other spectra, such as of positron lifetimes, x-ray diffractograms, “DATA” contains raw ... -
Solute-solute interactions in intermetallic compounds studied using perturbed angular correlation of gamma rays
(2017-05)Interactions between pairs of solute atoms dissolved in a binary intermetallic compound were studied. Perturbed angular correlation of gamma rays (PAC) was used to detect solute atoms next to impurity PAC probe atoms in ... -
Extending Miedema's Semi-Empirical Model to Predict Defect Site Preferences and Formation Enthalpies of Ordered Compounds
(2016-12)Miedema's Semi-Empirical Model is a method in which a simple calculation provides a rough estimate of the formation enthalpy of a single defect atom (of element X) surrounded completely by a solvent element (element A). ... -
A qualitative look at the thermodynamics of ternary phase diagrams
(2016-05)In 2014, Collins’ research group embarked on experiments using Perturbed Angular Correlation (PAC) spectroscopy to measure interactions between solute atoms in ternary alloys. PAC requires a probe atom, 111In, making the ... -
Investigations of ternary alloys using perturbed angular correlations
(2015-06)The intended goal of this research was to investigate interactions between solute atoms in intermetallics using a nuclear probe method, Perturbed Angular Correlation (PAC) of gamma rays. The PAC probe, radioactive 111In, ... -
Atomic jump frequencies in intermetallic compounds studied using perturbing angular correlation of gamma rays
(2012-08)Atomic jump frequencies were determined in a variety of intermetallic compounds through analysis of nuclear relaxation of spectra measured using the nuclear hyperfine technique, perturbed angular correlation (PAC) of gamma ... -
Site preferences and jump frequencies of In/Cd solutes in rare earth palladium phases having the L1 sub 2 structure
(2012-07)The method of Perturbed Angular Correlation of gamma rays (PAC) was used to study site preferences of indium solutes and jump frequencies of cadmium impurities in rare-earth palladium phases RPd sub 3 which has the L1 sub ... -
Lattice locations and diffusion in intermetallic compounds explored through PAC measurements and DFT calculations
(2012-05)Site preferences of 111In/Cd impurity probe atoms were studied as a function of composition in Al3Ni and as a function of temperature in Al3Ti and Al3Zr structures using perturbed angular correlation of gamma rays (PAC). ... -
Indium solubility in α-gallium and gallium-indium eutectic alloys studied using PAC
(2011-08)The melting temperature in α-gallium is 303K. The method of perturbed angular correlation of gamma rays (PAC) was used to determine the solubility of 111In probe atoms present at of 10-10 mole fraction. Below 303K and above ... -
Nuclear relaxation in CoGa3 lattice structures
(2010-01)Perturbed Angular Correlation (PAC) Spectroscopy is a method utilized to study hyperfine interactions within solids by observing the gamma rays emitted by the nuclear decay of probe atoms that have been artificially infused ...