Biography
Associate Professor
BSc, MSc, PhD (Dalhousie)
Dr. Derek Lawther, an experimental physicist, uses positron annihilation to identify defects in materials such as metals. He probes for defects at the atomic level and works to understand better how to manipulate these defects to produce enhanced physical properties such as increased strength or conductivity.
Recent Publications
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Simulated positron lifetime (SimPL): a Monte Carlo simulator for positron diffusion, trapping, and lifetime spectra
- physica status solidi (c), 2007
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Experimental identification of nitrogen-vacancy complexes in nitrogen implanted silicon
- Applied Physics Letters, 2001
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On the electrical deactivation of arsenic in silicon
- Journal of Vacuum Science & Technology B, 1997
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Chemical information in positron annihilation spectra
- Applied Physics Letters, 1996
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A Doppler broadening positron annihilation technique for the study of defects in bulk samples
- Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms, 1996
Research Classification
- no classification
Research Interests
- Investigation of the links between atomic-scale defects in materials and their corresponding macroscopic physical properties
- Positron annihilation spectroscopy
- Radiation detection and measurement
- Raman spectroscopy
Current Scholars in Physics
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