Journal of Physics B Atomic and Molecular Physics · 1979 · 15 citations · 9 references
Natural SciencesPhysicsNuclear PhysicsCross Section DataNuclear Cross SectionsNuclear DecayRadioactive DecayCollision Cross SectionsElectron-positron CollisionsHelium Isotopes
The fraction of positrons forming positronium in helium gas in a conventional positron lifetime system is enhanced by the addition of small quantities of any other gas. The magnitude of this increase at very low concentrations is used to measure the mean positronium formation cross section for a number of gases.
9
Positron lifetime spectra for the noble gases
P. G. Coleman, T C Griffith, G R Heyland et al. · Journal of Physics B Atomic and Molecular Physics · 1975 · 78 citations
Total cross-section measurements for 2–400 eV positrons in the rare gases
K. F. Canter, P. G. Coleman, T C Griffith et al. · Applied Physics A · 1974 · 47 citations