TY - JOUR
T1 - Low energy positron interactions with rare gas atoms
T2 - Threshold features and benchmark cross sections
AU - Sullivan, James
AU - Caradonna, Peter
AU - Jones, Adric
AU - Machacek, Josh
AU - Makochekanwa, Casten
AU - McEachran, Robert
AU - Mueller, Dennis
AU - Buckman, Stephen
PY - 2011
Y1 - 2011
N2 - Using a high resolution (∼60 meV FWHM) positron beam from a Surko buffer-gas trap, we have measured grand total cross sections as well as total elastic, positronium formation and electronic excitation cross sections in the rare gases. Strong threshold (Wigner) cusps are observed in the elastic scattering channel in all the rare gases at the opening of the positronium formation channel. We present low energy elastic scattering measurements for neon which show excellent agreement with recent theory and potentially establish this system as a 'benchmark'.
AB - Using a high resolution (∼60 meV FWHM) positron beam from a Surko buffer-gas trap, we have measured grand total cross sections as well as total elastic, positronium formation and electronic excitation cross sections in the rare gases. Strong threshold (Wigner) cusps are observed in the elastic scattering channel in all the rare gases at the opening of the positronium formation channel. We present low energy elastic scattering measurements for neon which show excellent agreement with recent theory and potentially establish this system as a 'benchmark'.
UR - http://www.scopus.com/inward/record.url?scp=79952176471&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/262/1/012056
DO - 10.1088/1742-6596/262/1/012056
M3 - Article
AN - SCOPUS:79952176471
SN - 1742-6588
VL - 262
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012056
ER -