Direct Observation of a Ramsauer-Townsend Effect in Positron-Argon Collisions
Authors:
- 15 March 1976
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 36 (11) , 580-584
Abstract
Transmission measurements of the total scattering cross section for positrons of welldefined energy colliding with argon atoms in the energy range extending from 0.4 to 18 eV reveal a shallow minimum in the vicinity of 2 eV. The measured total cross section at the minimum is 2.4× . These measurements also reveal an abrupt increase in the total cross section above the threshold for positronium formation (9.0 eV).
Keywords
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