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Title: Spectroscopic and neutron detection properties of rare earth and titanium doped LiAlO2 single crystals

Abstract

In this study, LiAlO2 crystals doped with rare-earth elements and Ti were produced by the CZ method and spectroscopic and neutron detection properties were investigated. Photoluminescence revealed no clear luminescent activation of LiAlO2 by the rare-earth dopants though some interesting luminescence was observed from secondary phases within the crystal. Gamma-ray pulse height spectra collected using a 137Cs source exhibited only a Compton edge for the crystals. Neutron modeling using Monte Carlo N-Particle Transport Code revealed most neutrons used in the detection setup are thermalized, and while using natural lithium in the crystal growth, which contains 7.6% 6Li, a 10 mm Ø by 10 mm sample of LiAlO2 has a 70.7% intrinsic thermal neutron capture efficiency. Furthermore, the pulse height spectra collected using a 241Am-Be neutron source demonstrated a distinct neutron peak.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1376735
Alternate Identifier(s):
OSTI ID: 1364380
Report Number(s):
PNNL-SA-121859
Journal ID: ISSN 0022-2313; S0022231316315320; PII: S0022231316315320
Grant/Contract Number:  
AC05-76RL01830; PNNL-SA-121859; AC0576RL01830
Resource Type:
Published Article
Journal Name:
Journal of Luminescence
Additional Journal Information:
Journal Name: Journal of Luminescence Journal Volume: 190 Journal Issue: C; Journal ID: ISSN 0022-2313
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Dickens, Peter T., Marcial, José, McCloy, John, McDonald, Benjamin S., and Lynn, Kelvin G. Spectroscopic and neutron detection properties of rare earth and titanium doped LiAlO2 single crystals. Netherlands: N. p., 2017. Web. https://doi.org/10.1016/j.jlumin.2017.05.047.
Dickens, Peter T., Marcial, José, McCloy, John, McDonald, Benjamin S., & Lynn, Kelvin G. Spectroscopic and neutron detection properties of rare earth and titanium doped LiAlO2 single crystals. Netherlands. https://doi.org/10.1016/j.jlumin.2017.05.047
Dickens, Peter T., Marcial, José, McCloy, John, McDonald, Benjamin S., and Lynn, Kelvin G. Sun . "Spectroscopic and neutron detection properties of rare earth and titanium doped LiAlO2 single crystals". Netherlands. https://doi.org/10.1016/j.jlumin.2017.05.047.
@article{osti_1376735,
title = {Spectroscopic and neutron detection properties of rare earth and titanium doped LiAlO2 single crystals},
author = {Dickens, Peter T. and Marcial, José and McCloy, John and McDonald, Benjamin S. and Lynn, Kelvin G.},
abstractNote = {In this study, LiAlO2 crystals doped with rare-earth elements and Ti were produced by the CZ method and spectroscopic and neutron detection properties were investigated. Photoluminescence revealed no clear luminescent activation of LiAlO2 by the rare-earth dopants though some interesting luminescence was observed from secondary phases within the crystal. Gamma-ray pulse height spectra collected using a 137Cs source exhibited only a Compton edge for the crystals. Neutron modeling using Monte Carlo N-Particle Transport Code revealed most neutrons used in the detection setup are thermalized, and while using natural lithium in the crystal growth, which contains 7.6% 6Li, a 10 mm Ø by 10 mm sample of LiAlO2 has a 70.7% intrinsic thermal neutron capture efficiency. Furthermore, the pulse height spectra collected using a 241Am-Be neutron source demonstrated a distinct neutron peak.},
doi = {10.1016/j.jlumin.2017.05.047},
journal = {Journal of Luminescence},
number = C,
volume = 190,
place = {Netherlands},
year = {2017},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.jlumin.2017.05.047

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Cited by: 1 work
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Works referencing / citing this record:

The Role of the Cu on OSL Emission in Gamma-LiAlO2:Cu Crystal
journal, January 2020


Ultra-Low Voltage Metal Oxide Thin Film Transistor by Low-Temperature Annealed Solution Processed LiAlO2 Gate Dielectric
journal, November 2019

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