Conduction transients in single-crystal octadecane |
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Authors: | MR Belmont RM Hooper PAC Amechi |
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Institution: | Department of Engineering Science, University of Exeter, North Park Road, Exeter, Devon, EX4 4QF, United Kingdom |
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Abstract: | Charge transients were measured in high-quality single-crystal octadecane after electron beam irradiation. The signals produced were of significantly greater duration than the ionization pulse but were not interpretable by conventional uniform field time-of-flight analysis. By assuming that the specimens contained a strong inbuilt polarization field, it was possible to predict the properties of the observed charge transients and obtain values for the positive and negative drift mobilities. The results indicated a positive species with a mobility of 0.7 × 10?4 m2 V?1 s?1 and a negative carrier value of 1.6 × 10?4 m2 V?1 s?1. The standard deviations observed in the data were large, being 0.3 × 10?4 m2 V?1 s?1 and 0.8 × 10?4 m2 V?1 s?1, respectively. This scatter was significantly in excess of the estimated experimental error. |
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