Dr. Jan Chojcan

Office: room no. 180
Phone: +48 71 375-9314
Fax: +48 71 328-7365
Email: chojcan@ifd.uni.wroc.pl

Biographical Information:
Assistant, Senior Assistant, Assistant Professor, University of Wroc³aw from 1974.
B.Sc. (University of Wroc³aw) 1974
Ph.D. (University of Wroc³aw) 1983
Hab. (University of Wroc³aw) 2004

Research Interests
I use positrons from radioactive isotopes as well as gamma rays to study the bulk properties of solids. By measuring the positron lifetime spectra and the Mössbauer spectra of nuclear gamma resonance absorption, information is gained on the submicroscopic structure of the sample. The methods have found particular utility in the study of formation and annealing of open-volume (vacancy-like) point defects as well as distribution of admixtures in iron based solid solutions and hence the thermodynamic parameters of the materials - heat of solution for example.

Selected publications:

  • J.Chojcan, "A dilute-limit heat of solution of 3d transition metals in iron studied with 57Fe Mössbauer spectroscopy", Hyperfine Interactions 156, 523-529 (2004).
  • J.Chojcan, "Interactions between V atoms in iron-based Fe-V solid solutions", Journal of Alloys and Compounds 350, 62-67 (2003)
  • J.Chojcan, "Thermal defects in Fe-Cr solid solutions revealed by 57Fe Mössbauer spectroscopy", Journal of Alloys and Compounds 337, 25-29 (2002).
  • J.Chojcan and M.Sachanbiñski, "Atomic-scale vacuities and age of obsidians", Materials Science Forum 363-365, 362-364 (2001).
  • J.Chojcan, "Interactions between impurity atoms of 3d transition metals dissolved in iron", Journal of Alloys and Compounds 264, 50-53 (1998).