Monte Carlo studies of positrons in matter. Method and application to annihilation spectra in helium gas
- 1 August 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 16 (2), 518-524
- https://doi.org/10.1103/physreva.16.518
Abstract
A Monte Carlo method is described for simulating the trajectories and annihilation of positrons in matter. The technique is applied to the calculation of annihilation spectra of slow positrons in helium gas at several temperatures and with various assumed distributions for the initial positron momenta. The results obtained are essentially independent of the initial momentum distribution and are in excellent agreement with the available experimental and theoretical data. Advantages of the Monte Carlo formulation for treating a wide range of problems in positron annihilation are discussed.Keywords
This publication has 20 references indexed in Scilit:
- Positron and orthopositronium decay rates in helium at high densitiesPhysical Review A, 1977
- Diffusion of positrons in helium gasJournal of Physics B: Atomic and Molecular Physics, 1977
- Positron lifetime spectra for the noble gasesJournal of Physics B: Atomic and Molecular Physics, 1975
- Electric Field and Temperature Dependence of Positron Annihilation in Argon GasCanadian Journal of Physics, 1974
- Positron studies of condensed matterAdvances in Physics, 1973
- Slow positrons in rare gasesContemporary Physics, 1972
- Temperature dependence of positron annihilation in helium, neon and argonJournal of Physics B: Atomic and Molecular Physics, 1972
- Positron diffusion and annihilation in heliumJournal of Physics B: Atomic and Molecular Physics, 1969
- Annihilation of Positrons in Argon II. TheoreticalPhysical Review B, 1969
- Electric field dependence of the annihilation rate of positrons in heliumPhysics Letters A, 1969