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An Encapsulated Silicon Junction Alpha-Particle Detector

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3 Author(s)
P. P. Webb ; RCA Victor Res. Labs., Montreal, Canada ; R. L. Williams ; R. W. Jackson

The construction of a silicon diffused junction alpha detector in a form which allows complete encapsulation and protection of the junction edge, and which preserves a good geometry is described. The unit is inherently shielded from electrical pickup, and is shielded from ambient light by a thin metallic film over the sensitive surface. A modified form of the same encapsulation has been used for large area units of 2 cm2 suitable for contamination monitoring. Measurements of energy resolution and other characteristics are reported for units of sensitive area 5 mm2, 20 mm2 and 200 mm2.

Published in:

IRE Transactions on Nuclear Science  (Volume:7 ,  Issue: 2-3 )