Modelling neutron transport in planetary media via analytical multigroup diffusion theory

P. Panfili, A. Luciani, Roberto Furfaro, Barry D Ganapol, D. Mostacci

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A novel analytical solution to the 1D, steady-state, multi-slab, multi-group diffusion equation is proposed as a mean to compute the energy-dependent galactic cosmic ray-induced neutron fluxes established in planetary media. More specifically, the proposed algorithm is implemented to allow fast and highly accurate determination of low-energy cosmic ray neutrons inside the Earth's surface and atmosphere. Two sets of experimental measurements have been considered to validate our model. In both cases, a good agreement between the calculated and observed neutron fluxes is achieved. Subsequently, neutron diffusion calculations have been performed for various Earth-based scenarios comprising (a) two-slab (air-soil) configuration and (b) three-slab (air-soil-ice) configuration to investigate the functional relationship between soil composition and neutron spatial distribution.

Original languageEnglish (US)
Pages (from-to)340-344
Number of pages5
JournalRadiation Effects and Defects in Solids
Volume164
Issue number5-6
DOIs
StatePublished - May 2009

Fingerprint

diffusion theory
soils
Neutrons
slabs
Neutron flux
Cosmic rays
flux (rate)
Soils
neutrons
Earth (planet)
air
Earth atmosphere
Ice
Earth surface
Air
configurations
Spatial distribution
cosmic rays
spatial distribution
ice

Keywords

  • Diffusion
  • Earth
  • Galactic cosmic rays
  • Neutrons

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Nuclear and High Energy Physics
  • Radiation
  • Materials Science(all)

Cite this

Modelling neutron transport in planetary media via analytical multigroup diffusion theory. / Panfili, P.; Luciani, A.; Furfaro, Roberto; Ganapol, Barry D; Mostacci, D.

In: Radiation Effects and Defects in Solids, Vol. 164, No. 5-6, 05.2009, p. 340-344.

Research output: Contribution to journalArticle

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