An electromagnetic physics constructor for low energy polarised X-/gamma ray transport in Geant4

Jeremy M.C. Brown; Matthew R. Dimmock

doi:10.1016/j.nimb.2021.06.009

An electromagnetic physics constructor for low energy polarised X-/gamma ray transport in Geant4

Jeremy M.C. Brown, Matthew R. Dimmock

Medical Imaging & Radiation Sciences

Research output: Contribution to journal › Article › Research › peer-review

Abstract

The production, application, and/or measurement of polarised X-/gamma rays are key to the fields of synchrotron science and X-/gamma-ray astronomy. The design, development and optimisation of experimental equipment utilised in these fields typically relies on the use of Monte Carlo radiation transport modelling toolkits such as Geant4. In this work the Geant4 “G4LowEPPhysics” electromagnetic physics constructor has been reconfigured to offer a best set of electromagnetic physics models for studies exploring the transport of low energy polarised X-/gamma rays. An overview of the physics models implemented in “G4LowEPPhysics”, and it's experimental validation against Compton X-ray polarimetry measurements of the BL38B1 beamline at the SPring-8 synchrotron (Sayo, Japan) is reported. “G4LowEPPhysics” is shown to be able to reproduce the experimental results obtained at the BL38B1 beamline (SPring-8) to within a level of accuracy on the same order as Geant4’s X-/gamma ray interaction cross-sectional data uncertainty (approximately ± 5 %).

Original language	English
Pages (from-to)	176-182
Number of pages	7
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	502
DOIs	https://doi.org/10.1016/j.nimb.2021.06.009
Publication status	Published - 1 Sept 2021

Keywords

Compton scattering
Gamma-ray astronomy
Geant4
Polarized gamma ray
Synchrotron radiation facility
X-ray astronomy

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title = "An electromagnetic physics constructor for low energy polarised X-/gamma ray transport in Geant4",

abstract = "The production, application, and/or measurement of polarised X-/gamma rays are key to the fields of synchrotron science and X-/gamma-ray astronomy. The design, development and optimisation of experimental equipment utilised in these fields typically relies on the use of Monte Carlo radiation transport modelling toolkits such as Geant4. In this work the Geant4 “G4LowEPPhysics” electromagnetic physics constructor has been reconfigured to offer a best set of electromagnetic physics models for studies exploring the transport of low energy polarised X-/gamma rays. An overview of the physics models implemented in “G4LowEPPhysics”, and it's experimental validation against Compton X-ray polarimetry measurements of the BL38B1 beamline at the SPring-8 synchrotron (Sayo, Japan) is reported. “G4LowEPPhysics” is shown to be able to reproduce the experimental results obtained at the BL38B1 beamline (SPring-8) to within a level of accuracy on the same order as Geant4{\textquoteright}s X-/gamma ray interaction cross-sectional data uncertainty (approximately ± 5 %).",

keywords = "Compton scattering, Gamma-ray astronomy, Geant4, Polarized gamma ray, Synchrotron radiation facility, X-ray astronomy",

author = "Brown, {Jeremy M.C.} and Dimmock, {Matthew R.}",

note = "Funding Information: J. M. C. Brown would like to acknowledge Professor Fuyuki Tokanai of Yamagata University (Japan) for their helpful clarification of the experimental setup and methodology implemented in Tokanai et al. [50]. Supporting data sets are accessible at the Delft University of Technology Research Data repository ( https://data.4tu.nl/). Publisher Copyright: {\textcopyright} 2021 The Author(s) Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

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An electromagnetic physics constructor for low energy polarised X-/gamma ray transport in Geant4

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Keywords

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