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SUMMARY:Developments of Geant4 physics models and user applications
DTSTART;VALUE=DATE-TIME:20261030T140000Z
DTEND;VALUE=DATE-TIME:20261030T142000Z
DTSTAMP;VALUE=DATE-TIME:20261027T142531Z
UID:indico-contribution-6344@cern.ch
DESCRIPTION:Speakers: Vladimir Ivantchenko (Tomsk State Research Universit
 y)\nWe report results of developments carried out in the framework of proj
 ect of Tomsk State Research University supported by the Government of Russ
 ian Federation.\nThe Geant4 toolkit is widely used in HEP and in other app
 lication domains including space science and radiation medicine. For the G
 eant4 electro-magnetic physics two new processes we provided: muon pair pr
 oduction by relativistic muons\; positron annihilation into 2 or 3 gamma q
 uanta considering radiative corrections and formation of a positronium sta
 te at rest. The last process is important for simulation of PET tomography
 \, in the new model a linear polarization of photons and Doppler broading 
 are implemented. For prediction of radiation effects in space and for stud
 y of radiation therapy we contributed to Geant4-DNA project devoting model
 s for protons and ions interaction with liquid water and comparisons of th
 ese results with experimental data.\n\nFor hadronic physics of Geant4 a ge
 neral method to compute hadronic cross sections was developed based on Gla
 uber theory with Gribov corrections and on experimental data. Provided cro
 ss sections are applicable to any energy of any hadron. We study and impro
 ve low-energy cross sections of low energy neutrons starting from kinetic 
 energy 1 eV. We improved Geant4 pre-compound model and de-excitation modul
 e. Results of validation versus experimental data will be presented.\n\nSe
 veral specific applications of Geant4 were developed. A possibility of usi
 ng an accelerator-driven system of the Prometheus proton therapy complex t
 o obtain medical isotopes was studied. An accelerator-driven system with u
 ranium target was simulated in Geant4 software.\n\nWe have developed a new
  portal GEANT4RU for education purpose\, and for use in researches in vari
 ous application domains. In this work we present this software for the fir
 st time.\n\nhttps://indico.particle.mephi.ru/event/626/contributions/6344/
LOCATION: Conference Hall 2
URL:https://indico.particle.mephi.ru/event/626/contributions/6344/
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