Excitation of the n=2 states of helium by positron impact

Caradonna, PeterSullivan, JamesJones, AdricMakochekanwa, CastenSlaughter, DanielMueller, DennisBuckman, Stephen2015-12-101050-2947http://hdl.handle.net/1885/52706A high-resolution (ΔE∼55 □ meV) trap-based positron beam has been used to measure absolute scattering cross sections for the excitation of the resolved 2 S1, P states of helium at energies between threshold and 38 eV. The experimental integral crossKeywords: Convergent close couplings; Experimental data; High resolution; Integral cross-sections; Positron beams; Positron impacts; Scattering cross section; Theoretical calculations; Positrons; HeliumExcitation of the n=2 states of helium by positron impact200910.1103/PhysRevA.80.0607012016-02-24