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Základní principy a metody pozitronové anihilační spektroskopie (PAS) a využití této techniky ve fyzice pevných
látek a materiálovém výzkumu, přehled nejdůležitějších experimentálních metod PAS, analýza experimentálních
dat získaných při PAS experimentech. Studentům bude dána možnost práce se spektrometry PAS a programy pro
analýzu dat a teoretické výpočty pozitronových parametrů.
Předmět byl vytvořen za podpory projektů Univerzity Karlovy z OP VVV Zvýšení kvality vzdělávání na UK a jeho
relevance pro potřeby trhu práce a Vybavení laboratoří pro experimentální složku výuky fyziky.
Last update: Valentová Helena, doc. RNDr., Ph.D. (31.01.2018)
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The aim of this lecture is to provide introduction to positron annihilation spectroscopy and its applications in study of lattice defects in solids. Last update: Čížek Jakub, prof. Mgr., Ph.D. (10.06.2019)
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Oral exam. Obtaining of credit is necessary for exam. Credit will be given for successful solution of given problem. Last update: Čížek Jakub, prof. Mgr., Ph.D. (10.06.2019)
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P. Hautojärvi (ed.) Positrons in solids, Springer-Verlag, Berlin (1979). A. Dupasquier, A.P. Mills (eds.), Proceedings of the International School of Physics "Enrico Fermi", IOS Press, Varenna (1995). R. Krause-Rehberg, H.S. Leipner, Positron annihilation in semiconductors, Springer-Velag, Berlin (1999). O.E. Mogensen: Positron annihilation in chemistry, Springer-Verlag, Berlin (1995). W.R. Leo: Techniques for nuclear and particle physics experiments, Springer-Verlag, Berlin (1987). M.J. Puska, R.M. Niemien: Theory of positrons in solids and on solid surfaces, Rev. Mod. Phys. 66, 841-897 (1994). F. Tuomisto, I. Makkonen: Defect identification in semiconductors with positron annihilation: Experiment and theory, Rev. Mod. Phys. 85, 1583-1631 (2013). P.J. Schultz, K.G. Lynn, Interaction of positron beams with surfaces, thin films, and interfaces, Rev. Mod. Phys. 60, 701 (1988). Ch. Hugenschmidt, Positrons in surface physics, Surf. Sci. Reports 71, 547-594 (2016) Last update: Čížek Jakub, prof. Mgr., Ph.D. (10.06.2019)
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lecture Last update: Čížek Jakub, prof. Mgr., Ph.D. (10.06.2019)
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Oral exam covers topics presented in lectures during semester. Last update: Čížek Jakub, prof. Mgr., Ph.D. (10.06.2019)
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Dirac theory of antimatter Positron and its fundamental properties Positron annihilation Positron sources and energetic spectra of emitted positrons Positron interaction with solid matter, positron thermalization, implantation profile Observable related to positron annihilation: positron lifetime, Doppler shift in energy of annihilation ration, angular correlation Basic experimental techniques, detectors and spectrometers Positron trapping at defects, simple trapping model Positron lifetime spectroscopy, positron lifetime spectrum and its analysis Angular correlations, Fermi surface reconstruction Doppler broadening of annihilation photo-peak, line shape parameters S, W Electron structure of solids and lattice defects Positron trapping in vacancies, determination of vacancy concentration, vacancy clusters Point defects in metals, semiconductors and insulators Positron trapping in dislocations, diffusion trapping model and its applications Positron confinement in precipitates, positron affinity Coincidence measurement of Doppler broadening and annihilation photo-peak and its applications Characterization of local chemical environment of defects Ab-initio theoretical calculations of positron parameters Moderation of positrons Slow positron beams with variable energy, defect depth profile, S(E) curve, S-W plot Pulsed positron beams Positronium and its properties Decay of positronium, Tao-Eldrup model Positronium porosimetry Positron diffraction Transmission and scanning positron microscope
Last update: Čížek Jakub, prof. Mgr., Ph.D. (10.06.2019)
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