Abstract

RAMOS, Dayron et al. Energy calibration of GaAs:Cr-based Timepix detector with alpha particles. Nucleus [online]. 2018, n.64, pp. 24-29.  Epub May 24, 2019. ISSN 2075-5635.

The advanced GaAs:Cr material for radiation detection is in the scope of many scientific and technological institutions in the world, as a result of its proved superior properties and economic advantages. The energy calibration of a hybrid GaAs:Cr-based Timepix detector with alpha particles performed in the Dzhelepov Laboratory of Nuclear Problems at Joint Institute for Nuclear Research confirms that the device is able to register these particles in energy range from 3140 to 7687 keV. The mathematical simulation was used to calculate the transmitted energy, making possible the experimental calibration with the use of Mylar as absorbent. By calibrating the detector with characteristic X rays of some target materials and using a two steps fitting procedure was determined the relationship between the photon energies and the registered by the detector TOT counts. The energy calibration with alpha particles was performed according to a linear function and verified with the measurement of the 218Po line of radon in air.

Keywords : Cuba; mathematical models; JINR; international cooperation; experimental data; calibration.

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