Detection of particles of metals in the shell casing for a partial species identification of weapons with the use of x-ray function-spectral analysis

Abstract

One of the current in the examination of gunshot injuries is to determine the combustion charge or factors that accompany the shot. At the same time, the question remains about the use of a scapegoat or non-narrative short-barrel weapon. Therefore, by detecting particles of metal balls membrane formed passing through the bore rifle, their visual, stereomikroskopichnoho research and using infrared rays and renthenfluorestsentnoho spectral analysis was possible species of partial identification of said weapons. The archival material of the department of the word-medical criminology of the Kiev city clinic bureau of a forensic medicine was used in the work. The obtained results were processed by standard methods of variation statistics. The study in the thickness of the lower edge of the input gunshot wounds were found strips of metal density yellow color with a high content of copper (Cu), zinc (Zn) and lead (Pb), which indicates the characteristics of the membrane balls outside covered with red brass (an alloy of copper and zinc). The main metal of bullets of 4 mm caliber, provided for examination, was lead. In the study of the surface of the globe №1, facing the canal weapons found four areas of wiping material shell formed from the action fields rifling firearms is the rifling on the surface membrane of the globe, the bottom of which is parallel to the rolls and grooves alternating with one another . Thus, the detection of metallic strips of yellow density, resulting from passing through the channel rifle, gave reason to identify it as the weapon used in isolation. Elevated levels of copper (Cu), zinc (Zn) and lead (Pb) indicates that the outside shell of the balls were coated red brass (an alloy of copper and zinc). So the ball was shell.