MC-PEPTITA: A Monte Carlo model for Photon, Electron and Positron Tracking In Terrestrial Atmosphere-Application for a terrestrial gamma ray flash

In this study, a Monte Carlo model has been developed for a Cerenkov-based fiber-optic gamma-ray sensor (CFOGRS) using the GEANT4 simulation toolkit. The detection material for gamma rays in CFOGRS is the transparent silica core of the optical fiber, which is also used for optical signal propagation. The model implemented with the GEANT4 includes the transport process of gamma rays, as well as the physical processes of Compton scattering, the Cerenkov effect, and optical photon propagation within the optical fiber. The model also simulated the applicability of the CFOGRS in a radiation environment by using the Monte Carlo code of GEANT4.

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A Monte Carlo Model for Gamma-Ray Klein-Nishina Scattering Probabilities to Finite Detectors

Journal of Nuclear Science and Technology ◽

10.1080/18811248.1996.9731990 ◽

1996 ◽

Vol 33 (9) ◽

pp. 736-740

Author(s):

Deng LI ◽

Cai SHAOHUI ◽

Huang ZHENGFENG ◽

Huang JIE

Keyword(s):

Monte Carlo ◽

Gamma Ray ◽

Monte Carlo Model

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Particle Acceleration in Mildly Relativistic Outflows of Fast Energetic Transient Sources

Universe ◽

10.3390/universe8010032 ◽

2022 ◽

Vol 8 (1) ◽

pp. 32

Author(s):

Andrei Bykov ◽

Vadim Romansky ◽

Sergei Osipov

Keyword(s):

Monte Carlo ◽

Particle Acceleration ◽

Gamma Ray ◽

Broad Band ◽

Monte Carlo Model ◽

High Energy ◽

Relativistic Electrons ◽

Particle In Cell ◽

Transient Sources ◽

Relativistic Outflows

Recent discovery of fast blue optical transients (FBOTs)—a new class of energetic transient sources—can shed light on the long-standing problem of supernova—long gamma-ray burst connections. A distinctive feature of such objects is the presence of modestly relativistic outflows which place them in between the non-relativistic and relativistic supernovae-related events. Here we present the results of kinetic particle-in-cell and Monte Carlo simulations of particle acceleration and magnetic field amplification by shocks with the velocities in the interval between 0.1 and 0.7 c. These simulations are needed for the interpretation of the observed broad band radiation of FBOTs. Their fast, mildly to moderately relativistic outflows may efficiently accelerate relativistic particles. With particle-in-cell simulations we demonstrate that synchrotron radiation of accelerated relativistic electrons in the shock downstream may fit the observed radio fluxes. At longer timescales, well beyond those reachable within a particle-in-cell approach, our nonlinear Monte Carlo model predicts that protons and nuclei can be accelerated to petaelectronvolt (PeV) energies. Therefore, such fast and energetic transient sources can contribute to galactic populations of high energy cosmic rays.

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Modeling of germanium detector and its sourceless calibration

Nuclear Technology and Radiation Protection ◽

10.2298/ntrp0802051s ◽

2008 ◽

Vol 23 (2) ◽

pp. 51-57

Author(s):

Milijana Steljic ◽

Miodrag Milosevic ◽

Petar Belicev

Keyword(s):

Monte Carlo ◽

Monte Carlo Simulations ◽

Uncertainty Analysis ◽

Response Function ◽

Gamma Ray ◽

Monte Carlo Model ◽

Pulse Height ◽

Germanium Detector ◽

Gamma Ray Detector

The paper describes the procedure of adapting a coaxial high-precision germanium detector to a device with numerical calibration. The procedure includes the determination of detector dimensions and establishing the corresponding model of the system. In order to achieve a successful calibration of the system without the usage of standard sources, Monte Carlo simulations were performed to determine its efficiency and pulse-height response function. A detailed Monte Carlo model was developed using the MCNP-5.0 code. The obtained results have indicated that this method represents a valuable tool for the quantitative uncertainty analysis of radiation spectrometers and gamma-ray detector calibration, thus minimizing the need for the deployment of radioactive sources.

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