Accession Number : AD1042003


Title :   Radiological and Nuclear Detection Material Science: Novel Rare-Earth Semiconductors for Solid-State Neutron Detectors and Thin High-k Dielectrics


Descriptive Note : Technical Report,15 Nov 2006,14 Jan 2012


Corporate Author : NEBRASKA UNIV LINCOLN LINCOLN United States


Personal Author(s) : Dowben,Peter ; Belashchenko,Kirill ; Losovyj,Yaroslav ; Brand,Jennifer


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1042003.pdf


Report Date : 01 Nov 2017


Pagination or Media Count : 28


Abstract : Specifically, the goals have been to investigate new materials based primarily on rare earth semiconductors, and explore new solid state detector configurations of these materials as neutron detectors. Seven materials (monoclinic and cubic Gd/HfO2 alloys, monoclinic and cubic Gd2O3, Gd/EuO, Gd doped GaN, and Li2B4O7) have been modeled, synthesized and made into devices. Various exemplar materials have been fabricated and the theoretical modeling has been completed for gadolinium oxide/hafnium alloys oxide, the gadolinium oxides, gadolinium doped europium oxides and gadolinium doped GaN. Neutron testing has also been achieved for the Gd/HfO2 alloy to silicon devices, Gd2O3 heterostructure diodes and, to a limited extent, lithium tetraborate. Characterization of heterojunction devices made from the Gd/EuO alloy has been performed. The more recent efforts (2011) within the scope of the project have emphasized Li2B4O7 because this materials exceptional merits as a neutron detector material by itself and also because of the potential of this material for oxide-to-oxide heterostructures.


Descriptors :   semiconductor devices , neutron detectors , advanced materials , gadolinium oxide , solid state electronics


Subject Categories : Nuclear Physics & Elementary Particle Physics
      Properties of Metals and Alloys
      Electrical and Electronic Equipment
      Test Facilities, Equipment and Methods


Distribution Statement : APPROVED FOR PUBLIC RELEASE