Photon transport physics in Serpent 2 Monte Carlo code

Toni Kaltiaisenaho

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)


This paper presents the photon physics models used in Serpent 2 Monte Carlo particle transport code. The four main photon interactions – photoelectric effect, Rayleigh scattering, Compton scattering and electron–positron pair production – are included in Serpent, accompanied by three secondary photon production mechanisms (electron–positron annihilation, atomic relaxation and bremsstrahlung emitted by electrons and positrons). Models, algorithms and data used for these interaction mechanisms are described, including new efficient sampling algorithms for photoelectron direction and electron–positron pair production.

Original languageEnglish
Article number107143
JournalComputer Physics Communications
Publication statusPublished - Jul 2020
MoE publication typeA1 Journal article-refereed


  • Gamma radiation
  • Monte Carlo
  • Photon physics
  • Photon transport
  • Serpent 2


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