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Rechargeable solid state neutron detector and visible radiation indicator

United States Patent

9,658,350
May 23, 2017
View the Complete Patent at the US Patent & Trademark Office
LISe Crystals
A radiation detection device, including: a support structure; and a chalcopyrite crystal coupled to the support structure; wherein, when the chalcopyrite crystal is exposed to radiation, a visible spectrum of the chalcopyrite crystal changes from an initial color to a modified color. The visible spectrum of the chalcopyrite crystal is changed back from the modified color to the initial color by annealing the chalcopyrite crystal at an elevated temperature below a melting point of the chalcopyrite crystal over time. The chalcopyrite crystal is optionally a .sup.6LiInSe.sub.2 crystal. The radiation is comprised of neutrons that decrease the .sup.6Li concentration of the chalcopyrite crystal via a .sup.6Li(n,.alpha.) reaction. The initial color is yellow and the modified color is one of orange and red. The annealing temperature is between about 450 degrees C. and about 650 degrees C. and the annealing time is between about 12 hrs and about 36 hrs.
Stowe; Ashley C. (Knoxville, TN), Wiggins; Brenden (Oak Ridge, TN), Burger; Arnold (Nashville, TN)
CONSOLIDATED NUCLEAR SECURITY, LLC (Oak Ridge, TN), FISK UNIVERSITY (Nashville, TN)
14/ 729,715
20150285924
June 3, 2015
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The U.S. Government has rights to the present disclosure pursuant to Contract No. DE-NA0001942 between the U.S. Department of Energy and Consolidated Nuclear Security, LLC.