As recently shown by Vicanek and Urbassek, the mean v of the large angle collisions suffered by a charged particle before slowing down to rest in a solid is a quantity that plays an important role in determining the backscattering probability from solid targets. V depends both on the range and on the transport cross section of the particles penetrating the solid. In these paper we give an analytical expression to calculate v for low energy positrons (E < 5 keV), based on a numerical code for the calculations of the differential elastic scattering cross section. Then we compare the backscattering coefficients, obtained by using the calculated values of v, to the results obtained with Monte Carlo simulations and to the available experimental data.
Backscattering of Positrons from Solid Targets
Dapor, Maurizio;
1998-01-01
Abstract
As recently shown by Vicanek and Urbassek, the mean v of the large angle collisions suffered by a charged particle before slowing down to rest in a solid is a quantity that plays an important role in determining the backscattering probability from solid targets. V depends both on the range and on the transport cross section of the particles penetrating the solid. In these paper we give an analytical expression to calculate v for low energy positrons (E < 5 keV), based on a numerical code for the calculations of the differential elastic scattering cross section. Then we compare the backscattering coefficients, obtained by using the calculated values of v, to the results obtained with Monte Carlo simulations and to the available experimental data.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
