The drift of positrons under the action of an electric field in Kapton has been observed by using a variable-energy positron beam and the Doppler broadening technique. Even if the maximum applied field (2 MV/cm) is so high that the electrostatic work for a displacement of less than 0.15 nm is larger than the thermal energy, the experimental data can be fit by the diffusion model with a field-independent mobility. The best-fit value of the mobility (ca. 1×10-3 cm2 V-1 s-1) is extremely low in comparison with other dielectrics. The results are discussed with regards to the interaction of positrons with the molecular field. © 1992 Springer-Verlag.

Experimental study of positron motion in Kapton / R. Brusa;A. Dupasquier;E. Galvanetto;A. Zecca. - In: APPLIED PHYSICS. A, SOLIDS AND SURFACES. - ISSN 0721-7250. - STAMPA. - 54:(1992), pp. 233-238. [10.1007/BF00323842]

Experimental study of positron motion in Kapton

GALVANETTO, EMANUELE;
1992

Abstract

The drift of positrons under the action of an electric field in Kapton has been observed by using a variable-energy positron beam and the Doppler broadening technique. Even if the maximum applied field (2 MV/cm) is so high that the electrostatic work for a displacement of less than 0.15 nm is larger than the thermal energy, the experimental data can be fit by the diffusion model with a field-independent mobility. The best-fit value of the mobility (ca. 1×10-3 cm2 V-1 s-1) is extremely low in comparison with other dielectrics. The results are discussed with regards to the interaction of positrons with the molecular field. © 1992 Springer-Verlag.
1992
54
233
238
R. Brusa;A. Dupasquier;E. Galvanetto;A. Zecca
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/780252
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