Problems of Forensic Sciences 2020 Vol. 124 (CXXIV) 211-236
APPLICATION OF ELECTRON MICROSCOPY, X-RAY SPECTROMETRY AND COMPUTED MICRO-TOMOGRAPHY FOR CHARACTERISATION OF GUNSHOT RESIDUE DEPOSITION IN TEXTILE AT CLOSE RANGE
Zuzanna BROŻEK-MUCHA1, Patrycja BOROWSKA1,2, Jacek TARASIUK3, Sebastian WROŃSKI 3
1Institute of Forensic Research, Kraków, Poland
2Jagiellonian University, Faculty of Chemistry, Kraków, Poland
3AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland
Streszczenie
A study of the distribution of gunshot residue originating from a hunting rifle on knitted cotton fabric depending on shooting distance was performed using scanning electron microscope with energy dispersive X-ray spectrometry, X-ray fluorescence micro-spectrometry, and micro-computed tomography. An information on the mechanism of interactions of the projectile and combustion gasses together with solid gunshot residue and cotton knitted fabric was obtained in both macro and micro scale. Characterisation of the systems of spherical inorganic gunshot particles and comparison to these originating from small arms provided an experimental confirmation that their properties as well as their movement and suspension in the air being described according to the Stokes law are similar to each other. This finding provided a scientific contribution to reasoning on shooting distance from the identification of gunshot residue as the only evidence in cases, when reference firearm and ammunition are not available for forensic examinations.
Słowa kluczowe
Spherical particles; Gunshot residue; Gunshot patterns; Cotton knitted textile; Hunting rifle cal. 12/70 cartridges; Scanning electron microscopy and energy dispersive X-ray spectrometry; Micro-X-ray fluorescence spectrometry; X-ray computed micro-tomogra