Pepe, I.
Paul, DAL.
Deutsch, Jules
[UCL]
Prieels, René
[UCL]
The intensity of the orthopositronium component and its lifetime have been measured in liquid nitrogen as a function of electric field. While the lifetime remains constant at about 12.5 ns, the fraction of positronium formed is about 20% at zero field and monotonically to an asymptotic value near 6% as the field is raised to 3.2 MV m-1. The is roughly exponential with a drop off rate of 2.0 MV m-1. The results are a further indication of the importance of Mogensen's spur mechanism in the positronium formation process.
Référence bibliographique |
Pepe, I. ; Paul, DAL. ; Deutsch, Jules ; Prieels, René. Positronium Formation in Liquid-nitrogen As a Function of Electric-field. In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 26, no. 13, p. L373-L378 (1993) |
Permalien |
http://hdl.handle.net/2078.1/49598 |