Positron Scattering at Thermal Energies

• Authors: K. Fedus , G. Karwasz
• Languages of publication: EN

Abstracts

EN

Modified effective range theory in analytical form is used to extrapolate elastic cross-sections down to thermal energies for positron scattering from five atomic and molecular targets including Ar, H_2, N_2, C_6H_6 (benzene) and C_6H_{12} (c-hexane). The derived scattering parameters are then used to estimate the annihilation rates for chosen elements using a simple formula by Gribakin. We show that a combination of two simple models has a potential for accurate parameterization of coefficients describing the interaction of thermal positrons with non-polar targets of low polarizability such as Ar and N_2.

Keywords

EN

34.80.-i; 34.80.Bm; 34.80.Uv

Discipline

• 34.80.Uv: Positron scattering
• 34.80.-i: Electron and positron scattering
• 34.80.Bm: Elastic scattering

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 3
• Pages: 829-832

Dates

published

2014-03

Contributors

author

K. Fedus

• Institute of Physics, Nicolaus Copernicus University, Grudziądzka 5/7, 87-100 Toruń, Poland

author

G. Karwasz

• Institute of Physics, Nicolaus Copernicus University, Grudziądzka 5/7, 87-100 Toruń, Poland

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Identifiers

DOI

10.12693/APhysPolA.125.829