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A Preliminary Observation on AgGaSe2 as a Nuclear Radiation Detector

Published online by Cambridge University Press:  15 February 2011

Eiji Sakai
Affiliation:
Japan Atomic Energy Research Institute, Tokaimura, Nakagun, Ibarakiken,Japan 319–11
Hiromichi Horinaka
Affiliation:
Japan Atomic Energy Research Institute, Tokaimura, Nakagun, Ibarakiken,Japan 319–11
Hajimu Sonomura
Affiliation:
Japan Atomic Energy Research Institute, Tokaimura, Nakagun, Ibarakiken,Japan 319–11
Takeshi Miyauchi
Affiliation:
Japan Atomic Energy Research Institute, Tokaimura, Nakagun, Ibarakiken,Japan 319–11
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Abstract

An about 108 ohm-cm AgGaSe2 crystal of 0.5 mm × 4 mm × 4 mm was polished and contacts were made by evaporating 130 μg/cm2 gold of 3 mm diameter on the two faces of the crystal. The detector was tested using 5.5 MeV alpha-particles at room temperature. Noise increased above an applied bias voltage of 80 V. For + 50 V applied on the electrode opposite to the particle incident electrode, i.e., for electron traversal mode, the preamplifier output pulses showed a risetime of 20 μs and an amplitude of about one-tenth of that obtained from a silicon surface-barrier detector whereas the silicon detector showed a risetime of 0.07 μs. For - 50 V applied on the same electrode, i.e., for hole traversal mode, no pulses were observed.

Type
Research Article
Copyright
Copyright © Materials Research Society 1983

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References

REFERENCES

1. For example, Sakai, E., Nucl. Instr. and Meth. 196, 121 (1982).CrossRefGoogle Scholar
2. Burger, A., Shilo, I. and Schieber, M., IEEE 1982 Nucl. Sci. Symp., IGI0, Washington, D. C. (October 1982).Google Scholar
2a To be published in IEEE Trans. Nucl. Sci. NS–30, No.1 (February 1983).Google Scholar