Positron backscattering from solid targets: Modeling of scattering processes via various approaches

B. Kribaa (1) , Z. Rouabah (1) , C. Le Loirec (2) , C. Champion (3) , N. Bouarissa (4)

1 Materials and Electronic Systems Laboratory (LMSE)
2 DISC (CEA, LIST) - Département Imagerie et Simulation pour le Contrôle (CEA, LIST)
3 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
4 Uni M'sila - University of M'sila / Université Mohamed Boudiaf - M'sila

Monte Carlo simulation of 1-4 keV positron backscattering from semi-infinite solid targets ranging from Be (z = 4) to Au (z = 79) with normal angle of incidence is here reported. In our study, the elastic and inelastic scattering cross sections are modeled by using various approaches based on either a classical or a quantum mechanical treatment. Calculations of positron backscattering coefficient are then reported for the solid targets of interest. The results obtained show a fairly good agreement with the data available in the literature. The dependence of the positron backscattering coefficient versus the atomic number of the solid target of interest has been investigated. In this respect, polynomial functions are proposed which does not require any recourse to Monte Carlo calculations.

Mots clés: Polynomial functions; Monte Carlo calculation; Atoms; Backscattering; Electrons; Inelastic scattering; Intelligent systems; Positrons; Quantum theory; Backscattering coefficients; Elastic and inelastic scattering; Elastic cross sections; Inelastic cross sections; Quantum-mechanical treatments; Semi-infinite solids; Monte Carlo methods

Domaines: Physique [physics]

B. Kribaa, Z. Rouabah, C. Le Loirec, C. Champion, N. Bouarissa. Positron backscattering from solid targets: Modeling of scattering processes via various approaches. Micron, 2016, 87, pp.46-50. ⟨10.1016/j.micron.2016.04.009⟩. ⟨cea-01845389⟩