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Fabrication and characterization of silicon based thermal neutron detector with hot wire chemical vapor deposited boron carbide converter

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Title Fabrication and characterization of silicon based thermal neutron detector with hot wire chemical vapor deposited boron carbide converter
 
Creator CHAUDHARI, P
SINGH, A
TOPKAR, A
DUSANE, R
 
Subject AMORPHOUS-SILICON
FILMS
DECOMPOSITION
SILANE
DESIGN
Ortho-carborane
HWCVD
Boron carbide
Neutron detector
Silicon PIN diode
SIMS
 
Description In order to utilize the well established silicon detector technology for neutron detection application, a silicon based thermal neutron detector was fabricated by integrating a thin boron carbide layer as a neutron converter with a silicon PIN detector. Hot wire chemical vapor deposition (HWCVD), which is a low cost, low temperature process for deposition of thin films with precise thickness was explored as a technique for direct deposition of a boron carbide layer over the metalized front surface of the detector chip. The presence of B-C bonding and B-10 isotope in the boron carbide film were confirmed by Fourier transform infrared spectroscopy and secondary ion mass spectrometry respectively. The deposition of HWCVD boron carbide layer being a low temperature process was observed not to cause degradation of the PIN detector. The response of the detector with 0.2 mu m and 0.5 mu m thick boron carbide layer was examined in a nuclear reactor. The pulse height spectrum shows evidence of thermal neutron response with signature of (n, a) reaction. The results presented in this article indicate that HWCVD boron carbide deposition technique would be suitable for low cost industrial fabrication of PIN based single element or 1D/2D position sensitive thermal neutron detectors. (C) 2015 Elsevier B.V. All rights reserved,
 
Publisher ELSEVIER SCIENCE BV
 
Date 2016-01-15T04:46:28Z
2016-01-15T04:46:28Z
2015
 
Type Article
 
Identifier NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 779,33-38
0168-9002
1872-9576
http://dx.doi.org/10.1016/j.nima.2015.01.043
http://dspace.library.iitb.ac.in/jspui/handle/100/17793
 
Language en