نتایج جستجو برای: geant4 code
تعداد نتایج: 168902 فیلتر نتایج به سال:
Much research is being conducted on position-sensitive scintillation detectors for medical imaging, particularly for emission tomography. Monte Carlo simulations play an essential role in many of these research activities. As the scintillation process, the transport of scintillation photons through the crystal(s), and the conversion of these photons into electronic signals each have a major inf...
20 Modelling the radio-induced effects in biological medium requires accurate physics models to 21 describe in detail the main physical interactions induced by all the charged particles present in 22 the irradiated medium (secondary as well as primary ones). These interactions include 23 inelastic events like ionization and excitation processes as well as elastic scattering, the latter 24 being...
Imaging and identifying materials with high atomic numbers and densities, especially radioactive materials, is one of the issues that have been especially considered in recent years. Due to some limitations in conventional and old imaging techniques, finding an alternative method is very important. The cosmic muons with an infinite source are one of the sources that have been recently studied f...
The building block of the surface detector of the Pierre Auger Observatory is a water Cherenkov tank. The response to shower particles is simulated using a dedicated program based on GEANT4. To check the simulation chain, we compare the simulated signals produced by cosmic muons at various zenith angles with experimental data from a special Cherenkov detector equipped with a muon hodoscope. The...
روش طیف سنجی نابودی پوزیترون در دو دهه ی اخیر گسترش فراوانی یافته است و به درک بیشتر ساختار و خواص مواد مختلف از جمله رسانا ها و نیمه رسانا ها کمک شایانی نموده است. دقت و حساسیت بالا و همچنین غیر مخرب بودن از مهمترین مزیت های این روش است، به همین دلیل می توان از آن در بررسی ساختار لایه های نازک و نمونه های بسیار کوچک مواد استفاده کرد. در این رساله، پروفایل نفوذ پوزیترون های کم انرژی در مواد مخت...
Abstract The FY-3 satellites are China's second generation polar-orbiting meteorological satellites. high-energy particle detector (HEPD) suite of measures protons and electrons in different energy ranges. As the fifth satellite series, FY-3E continues to observe electrons. Here, we use Monte Carlo simulations based on GEANT4 code model electron calibrate electron/proton campaigns at Space Elec...
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