Positronium Formation in Liquid-nitrogen As a Function of Electric-field
(1993) Journal of Physics B: Atomic, Molecular and Optical Physics —
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- Abstract
- 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.
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Pepe, I., Paul, DAL., Deutsch, J., & Prieels, R. (1993). Positronium Formation in Liquid-nitrogen As a Function of Electric-field. Journal of Physics B: Atomic, Molecular and Optical Physics. https://doi.org/10.1088/0953-4075/26/13/010