Open AccessInelastic cross sections for positron scattering from atomic hydrogen
Author(s) -
M. Weber,
A. Hofmann,
Wilhelm Raith,
Wolfgang Sperber,
F. M. Jacobsen,
Kelvin G. Lynn
Publication year - 1994
Language(s) - English
Resource type - Reports
DOI - 10.2172/79980
Subject(s) - positron , physics , positronium , atomic physics , scattering , cross section (physics) , nuclear physics , hydrogen , inelastic scattering , range (aeronautics) , elastic scattering , electron , materials science , optics , quantum mechanics , composite material
Positronium formation (Ps) cross sections for positrons impinging on atomic hydrogen were measured in the impact energy range from 13eV to 255eV at the High Intensity Positron (HIP) beam at Brookhaven National Laboratory (BNL). The Ps-formation cross section was found to rise rapidly from the threshold at 6.8eV to a maximum value of (2.98 {plus_minus} 0.18) {times} 10{sup {minus}16} cm{sup 2} for {approx} 15eV positrons. By 75eV it drops below the detection limit of 0.17 {times} 10{sup {minus}16} cm{sup 2} which is the present level of statistical uncertainty. The experiment was modified to enable the measurement of doubly differential scattering cross sections