High aspect ratio composite structures with 48.5% thermal neutron detection efficiency

Q. Shao, L. F. Voss, A. M. Conway, R. J. Nikolic, M. A. Dar, C. L. Cheung

Research output: Contribution to journalArticle

36 Scopus citations


The pillar structured thermal neutron detector is based on the combination of high aspect ratio silicon p-i-n pillars surrounded by the neutron converter material 10B. By etching high aspect ratio pillar structures into silicon, the result is a device that efficiently absorbs the thermal neutron flux by accommodating a large volume fraction of 10B within the silicon pillar array. Here, we report a thermal neutron detection efficiency of 48.5% using a 50 μm pillar array with an aspect ratio of 25:1.

Original languageEnglish (US)
Article number063505
JournalApplied Physics Letters
Issue number6
Publication statusPublished - Feb 11 2013


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this