Neutron detection with LiInSe2

Zane W. Bell; A. Burger; Liviu Matei; Michael Groza; Ashley Stowe; Joshua Tower; Alireza Kargar; Huicong Hong

doi:10.1117/12.2189418

26 August 2015 Neutron detection with LiInSe₂

Zane W. Bell, A. Burger, Liviu Matei, Michael Groza, Ashley Stowe, Joshua Tower, Alireza Kargar, Huicong Hong

Proceedings Volume 9593, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVII; 95930D (2015) https://doi.org/10.1117/12.2189418
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

The detection of thermal neutrons has traditionally been accomplished with ³He-tubes, but with the recent shortage of ³He, much research has gone into finding suitable replacements. Both relatively inefficient ¹⁰B- and ⁶LiF-coated silicon diodes and HgI₂ have been known for many years, and engineered structures in Si that have been filled with ¹⁰B and ⁶LiF have shown promise. These devices are intended to realize an optimal juxtaposition of neutron-sensitive material and semiconductor and thereby simulate a semiconductor containing B or Li. Such material has been realized for the first time in the form of ⁶LiInSe₂ in which collectable charge from the ⁶Li(n,t) reaction indicates a neutron event. In this paper we report neutron and gamma responses of ⁶LiInSe₂, we show pulse height spectra from pure gamma sources and from a thermal neutron source, and we derive the μτ product from the position of spectral features as a function of bias voltage. In addition, we demonstrate the observation of the beta decay of ^116mIn in samples exposed to thermal neutrons. This feature of the response serves as an additional confirmation of exposure to neutrons.

Citation Download Citation

Zane W. Bell, A. Burger, Liviu Matei, Michael Groza, Ashley Stowe, Joshua Tower, Alireza Kargar, and Huicong Hong "Neutron detection with LiInSe₂", Proc. SPIE 9593, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVII, 95930D (26 August 2015); https://doi.org/10.1117/12.2189418

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