POSITRONIUM-ARGON SCATTERING

Authors
ZAFAR N LARICCHIA G CHARLTON M GARNER A
Citation
N. Zafar et al., POSITRONIUM-ARGON SCATTERING, Physical review letters, 76(10), 1996, pp. 1595-1598
Citations number
32
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
76
Issue
10
Year of publication
1996
Pages
1595 - 1598
Database
ISI
SICI code
0031-9007(1996)76:10<1595:PS>2.0.ZU;2-D
Abstract
The total cross section sigma(T) for orthopositronium (o-Ps) scatterin g from argon gas has been measured directly for the first time using a variable energy o-Ps beam in the range 16-95 eV. The cross section is found to rise from a value of approximately 9 X 10(-20) to 15 X 10(-2 0) m(2) in the 16-30 eV range and thereafter decline slowly to 11 X 10 (-20) m(2) at the highest energy investigated. Comparison with theory suggests that the increase in sigma(T) is probably due to inelastic pr ocesses.