ISSN:
1432-0630
Keywords:
66.30
;
71.60
;
78.70 B
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00323842
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