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Radiation detection, shielding and identification in public safety.
Kumičák, Ivan ; Šťastný, Ondřej (referee) ; Varmuža, Jan (advisor)
A problem of ionizing radiation is considered in this thesis. The work consists of few chapters, where types of ionizing radiation and its interaction with material environment, also separate measures, which characterize both a source of ionizing radiation and influence of ionizing radiation on a life form are describes. Kinds of detectors of ionizing radiation and principles of their running are taken up as well.
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Charge transport in semiconducting radiation detectors
Pipek, Jindřich ; Belas, Eduard (advisor)
This thesis is focused on study of charge transport in semiconducting radiation detectors. Theoretical calculations of current waveforms based on continuity equation and drift-diffusion equation are done. Useful approximations of current waveforms for detector with shallow electron trap are discussed. Monte Carlo simulation of the current waveforms is proposed and applied to fit experimental current waveforms measured using laser-induced transient current technique and for evaluation of charge transport parameters of the detector such as electric field profile, trapping and detrapping time of traps, drift mobility and other parameters. Detectors prepared from semi-insulating GaAs and CdZnTe single crystals are tested using electrical, spectroscopic and optical characterization techniques.
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Charge transport in semiconducting radiation detectors
Pipek, Jindřich ; Belas, Eduard (advisor)
This thesis is focused on study of charge transport in semiconducting radiation detectors. Theoretical calculations of current waveforms based on continuity equation and drift-diffusion equation are done. Useful approximations of current waveforms for detector with shallow electron trap are discussed. Monte Carlo simulation of the current waveforms is proposed and applied to fit experimental current waveforms measured using laser-induced transient current technique and for evaluation of charge transport parameters of the detector such as electric field profile, trapping and detrapping time of traps, drift mobility and other parameters. Detectors prepared from semi-insulating GaAs and CdZnTe single crystals are tested using electrical, spectroscopic and optical characterization techniques.
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Charge transport in semiconducting radiation detectors
Pipek, Jindřich ; Belas, Eduard (advisor) ; Hazdra, Pavel (referee)
This thesis is focused on study of charge transport in semiconducting radiation detectors. Theoretical calculations of current waveforms based on continuity equation and drift-diffusion equation are done. Useful approximations of current waveforms for detector with shallow electron trap are discussed. Monte Carlo simulation of the current waveforms is proposed and applied to fit experimental current waveforms measured using laser-induced transient current technique and for evaluation of charge transport parameters of the detector such as electric field profile, trapping and detrapping time of traps, drift mobility and other parameters. Detectors prepared from semi-insulating GaAs and CdZnTe single crystals are tested using electrical, spectroscopic and optical characterization techniques.
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Radiation detection, shielding and identification in public safety.
Kumičák, Ivan ; Šťastný, Ondřej (referee) ; Varmuža, Jan (advisor)
A problem of ionizing radiation is considered in this thesis. The work consists of few chapters, where types of ionizing radiation and its interaction with material environment, also separate measures, which characterize both a source of ionizing radiation and influence of ionizing radiation on a life form are describes. Kinds of detectors of ionizing radiation and principles of their running are taken up as well.
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Growth of InP crystals for radiation detectors and other application
Pekárek, Ladislav ; Yatskiv, Roman
Bulk InP single crystals were grown by Czochralski method. Various dopants were added to the melt to obtain single crystals suitable for radiation detectors and other application. The intentionally doped of InP crystals were characterized by measurements of resistivity and Hall coefficient. Prototype detectors were prepared and evaluated by spectral detection of alpha particles and x-rays.
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