Identification of heavy nucleus tracks and structure defects in natural crystals

Investigations on the use of extraterrestrial crystals as detectors of heavy charged particles are continued. The technique of track discrimination of charged particles from the intrinsic defects of crystal structure (capillar inclusions and dislocations) is proposed. The specific feature of all elongated structure inperfections, namely their strictly oriented position in crystal volume, correlating with main geometric directions characteristic to the given class of symmetry is in the basis of the method. In order to disriminate figures of etching of cappillar inclusions crystals are preliminary heated for annealing of microdefects, created by heavy nuclei of cosmic radiation. As an example determined are crystallographic directions in the sample of olivine from Marjalachti meteorite. Comparison of linear defect projections with standard maps of main crystallographic directions of the given crystal permits to carry out unambiguous identification of etched tracks of nuclei with Z>=50. The given technique is the necessary stage of investigations on the track search from stops of hypothetic superheavy elements, which can be synthesized in burst-like processes occurring in galaxy objects