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724115.pdf (1.31 MB)

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2021-12-13

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cc-by (c) Salvat Gavaldà, Francesc et al., 2021
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/189531

Collisions of nucleons with atoms: calculated cross sections and Monte Carlo simulation

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Recurs relacionat

https://doi.org/10.3389/fphy.2021.733949

Resum

After a summary description of the theory of elastic collisions of nucleons with atoms, we present the calculation of a generic database of differential and integrated cross sections for the simulation of multiple elastic collisions of protons and neutrons with kinetic energies larger than 100 keV. The relativistic plane-wave Born approximation, with binding and Coulomb-deflection corrections, has been used to calculate a database of proton-impact ionization of K-shell and L-, M-, and N-subshells of neutral atoms These databases cover the whole energy range of interest for all the elements in the periodic system, from hydrogen to einsteinium (Z = 1-99); they are provided as part of the penh distribution package. The Monte Carlo code system penh for the simulation of coupled electron-photon-proton transport is extended to account for the effect of the transport of neutrons (released in proton-induced nuclear reactions) in calculations of dose distributions from proton beams. A simplified description of neutron transport, in which neutron-induced nuclear reactions are described as a fractionally absorbing process, is shown to give simulated depth-dose distributions in good agreement with those generated by the Geant4 code. The proton-impact ionization database, combined with the description of atomic relaxation data and electron transport in penelope, allows the simulation of proton-induced x-ray emission spectra from targets with complex geometries.

Matèries

Fotons, Col·lisions (Física nuclear), Neutrons

Matèries (anglès)

Photons, Collisions (Nuclear physics), Neutrons

Citació

Col·leccions

Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

Citació

SALVAT GAVALDÀ, Francesc and QUESADA, José Manuel. Collisions of nucleons with atoms: calculated cross sections and Monte Carlo simulation. Frontiers In Physics. 2021. Vol. 9, num. 733949. ISSN 2296-424X. [consulted: 19 of August of 2026]. Available at: https://hdl.handle.net/2445/189531

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