Jakub Čížek

TL;DR: In this article, a spectrometer for positron-lifetime measurements assembled from two BaF2 scintillation detectors and two 8-bit, 4 GS s - 1 digitizes in a master-slave configuration is described in detail.

TL;DR: In this article, a complex investigation of mechanical properties is performed using uni-axial tensile and compression deformation tests and also by Vickers indentation that simulates multiaxial deformation, and it was shown that by tailoring the c/a ratio the typical texture development could be effectively suppressed in magnesium alloys processed by ECAP and in such way the negative effect of texture on strength can be avoided.

TL;DR: In this article, a systematic study of various, nominally undoped ZnO single crystals, either hydrothermally grown (HTG) or melt grown (MG), has been performed.

TL;DR: A spectrometer for measuring positron lifetimes in solids is described in this article, which consists of a pair of BaF2 scintillators coupled to Philips photomultipliers XP2020Q and a fast-slow coincidence system composed of standard NIM modules.

TL;DR: In this article, the authors used positron annihilation spectroscopy (PAS) combined with transmission electron microscopy, X-ray diffraction (XRD) and Vicker's microhardness (HV) measurements to examine the evolution of the microstructure during HPT processing.