6:1 aspect ratio silicon pillar based thermal neutron detector filled with 10B

R. J. Nikolić, A. M. Conway, C. E. Reinhardt, R. T. Graff, T. F. Wang, N. Deo, C. L. Cheung

Research output: Contribution to journalArticle

66 Scopus citations

Abstract

Current helium-3 tube based thermal neutron detectors have shortcomings in achieving simultaneously high efficiency and low voltage while maintaining adequate fieldability performance. By using a three-dimensional silicon p-i-n diode pillar array filled with boron-10 these constraints can be overcome. The fabricated pillar structured detector reported here is composed of 2 μm diameter silicon pillars with a 4 μm pitch and height of 12 μm. A thermal neutron detection efficiency of 7.3+-0.6% and a neutron-to-gamma discrimination of 105 at 2 V reverse bias were measured for this detector. When scaled to larger aspect ratio, a high efficiency device is possible.

Original languageEnglish (US)
Article number133502
JournalApplied Physics Letters
Volume93
Issue number13
DOIs
StatePublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Nikolić, R. J., Conway, A. M., Reinhardt, C. E., Graff, R. T., Wang, T. F., Deo, N., & Cheung, C. L. (2008). 6:1 aspect ratio silicon pillar based thermal neutron detector filled with 10B. Applied Physics Letters, 93(13), [133502]. https://doi.org/10.1063/1.2985817