6533b839fe1ef96bd12a59da

RESEARCH PRODUCT

Nonlinear density dependence of the positron decay rate in helium

Risto M. Nieminen

subject

PhysicsAntiparticleAnnihilationScatteringchemistry.chemical_elementPositronchemistryAntimatterPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentPhysics::Atomic PhysicsPositron emissionAtomic physicsHeliumLepton

description

The decay rate of thermalized positrons in helium is calculated as a function of the fluid density, incorporating the multiple scattering of the positron off the atoms. The obtained nonlinearity agrees with experimental data outside the self-trapping region.

https://doi.org/10.1103/physreva.21.1347