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Optimisation of importance sampling implementation in rare-event shielding simulations using Geant4 — arXiv:2609.03822

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.03822
License (as archived): CC0-1.0
Archived: 2026-10-17T03:08:03.171Z
SHA-256 of the archived text: f18f11977a1ee2090e23dc58be83a2a502097f54b8a15eeec21ed391e57bcaa5
Stable URL of this page: https://metraipolis.com/documento/dc_05c4eda81c19

How to cite

Optimisation of importance sampling implementation in rare-event shielding simulations using Geant4 — arXiv:2609.03822 — arXiv (en), https://arxiv.org/abs/2609.03822 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_05c4eda81c19 (Metraipolis archive dc_05c4eda81c19, sha256 f18f11977a1ee2090e23dc58be83a2a502097f54b8a15eeec21ed391e57bcaa5)

BibTeX

@misc{dc05c4eda81c19,
  title = {Optimisation of importance sampling implementation in rare-event shielding simulations using Geant4 — arXiv:2609.03822},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.03822},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_05c4eda81c19; sha256 f18f11977a1ee2090e23dc58be83a2a502097f54b8a15eeec21ed391e57bcaa5},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.03822. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Rare-event search experiments demand ever-lower backgrounds, and the resulting radio-pure materials and suppressive shielding make related background simulations computationally expensive without event biasing. We present a method for optimising the widely used importance splitting and Russian roulette technique for rare-event searches, in which a whole number of equal-width importance layers fill the shielding geometry. Balancing relative uncertainty against execution time, we optimise the layer thickness for both $\gamma$-rays and neutrons, and across different shielding materials and thicknesses. Expressed as a multiple of the primary particle's mean free path, the optimal thickness generalises across energies for a given particle type and yields a physics-based prediction applicable to any shielding design. The same trend reveals that over-biasing is possible, with relative uncertainty worsening at high layer counts for fixed execution time. The optimal configuration gives an $\mathcal{O}$(20) gain in computational efficiency over the unbiased case.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-04 in physics.comp-ph).
Categorie arXiv: Instrumentation and Detectors (physics.ins-det) ; High Energy Physics - Experiment (hep-ex); Computational Physics (physics.comp-ph).
Pagina del lavoro: https://arxiv.org/abs/2609.03822 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-17T03:00:43.901Z dalla pagina https://arxiv.org/catchup/physics.comp-ph/2026-09-04?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).