A fast-neutron detector based on single-crystalline silicon

V. A. Varlachev, E. S. Solodovnikov

Research output: Contribution to journalArticle


It is shown that the change of the specific electrical conductivity (SEC) of silicon single crystals in the process of their irradiation is directly proportional to the fast-neutron fluence. This is used as the basis of the principle of the neutron-flux detection. The coefficient of proportionality depends on the neutron spectrum, but does not depend on the initial SEC, which significantly simplifies detector calibration. A set of wafers with different SEC values has been manufactured using the technology silicon neutron-transmutation doping. The SEC has been measured by the four-probe method. A simple method for measuring the SEC without recourse to any special setup is proposed. The random measurement error of the fast-neutron fluence was ∼10%, and the absolute one was ∼37%.

Original languageEnglish
Pages (from-to)171-174
Number of pages4
JournalInstruments and Experimental Techniques
Issue number2
Publication statusPublished - Mar 2008

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Instrumentation

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