2007 JINST TH 001
Ph.D. degree thesis
accepted by
University of Frankfurt, Germany, in 2007
G�bor Laczk�
Supervisor: Volker Dangendorf
Investigation of the Radial Ionization Distribution of Heavy Ions with an Optical Particle Track Chamber and
Monte-Carlo Simulations
Keywords:
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Detector physics: concepts, processes, methods, modelling and simulations
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Instrumentation and techniques for medical imaging, diagnostics and therapy
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Instrumentation and techniques for dosimetry, monitoring and radiation
Abstract:
The difference in the relative biological efficiency (RBE) of ions of
same linear energy transfer (LET) but different atomic number (Z) can
be attributed to the difference in the radial ionisation
distribution. In this contribution we present data from measurements
of the spatial ionisation pattern of heavy ions of various Z but
similar LET and compare the results with track structure data obtained
by Monte Carlo simulations. The measurements were made with a time
projection chamber with optical readout (Optical Avalanche Chamber,
OPAC) which is able to quantitatively capture the spatial ionisation
pattern of an ion traversing the chamber.
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