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Pulse Shape Study of Chemical Vapor Deposited Diamond Alpha Particle Detectors

Published online by Cambridge University Press:  01 February 2011

S. G. Wang ,
P. J. Sellin ,
A. Lohstroh  and
M. E. Özsan
S. G. Wang
Affiliation:
Department of Physics, School of Electronics and Physical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom
P. J. Sellin
Affiliation:
Department of Physics, School of Electronics and Physical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom
A. Lohstroh
Affiliation:
Department of Physics, School of Electronics and Physical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom
M. E. Özsan
Affiliation:
Department of Physics, School of Electronics and Physical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom
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Abstract

We report a study of pulse shapes of a radiation detector with a sandwich structure fabricated from chemical vapor deposited (CVD) polycrystalline diamond. The pulse shapes were recorded at room temperature using 5.486 MeV alpha particles from 241Am source. Only “fast” component was observed in the electron predominated pulses, whereas both “fast” and “slow” components were obtained in the hole predominated pulses, suggesting that electron charge drift is prompt and no detrapping occurred. In contrast, hole charge drift is slower than expected and trapping-detrapping took place during hole travel process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 828: Symposium A – Semiconductor Materials for Sensing , 2004 , A8.7
Copyright
Copyright © Materials Research Society 2005

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References

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