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Title: Spectroscopic and neutron detection properties of rare earth and titanium doped LiAlO 2 single crystals

In this study, LiAlO 2 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 LiAlO 2 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 LiAlO 2 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:
 [1] ;  [1] ;  [1] ;  [2] ;  [1]
  1. Washington State Univ., Pullman, WA (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Report Number(s):
PNNL-SA-121859
Journal ID: ISSN 0022-2313; PII: S0022231316315320
Grant/Contract Number:
AC0576RL01830; AC05-76RL01830; PNNL-SA-121859
Type:
Published Article
Journal Name:
Journal of Luminescence
Additional Journal Information:
Journal Volume: 190; Journal ID: ISSN 0022-2313
Publisher:
Elsevier
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1376735
Alternate Identifier(s):
OSTI ID: 1364380

Dickens, Peter T., Marcial, Jose, McCloy, John, McDonald, Benjamin S., and Lynn, Kelvin G.. Spectroscopic and neutron detection properties of rare earth and titanium doped LiAlO2 single crystals. United States: N. p., Web. doi:10.1016/j.jlumin.2017.05.047.
Dickens, Peter T., Marcial, Jose, McCloy, John, McDonald, Benjamin S., & Lynn, Kelvin G.. Spectroscopic and neutron detection properties of rare earth and titanium doped LiAlO2 single crystals. United States. doi:10.1016/j.jlumin.2017.05.047.
Dickens, Peter T., Marcial, Jose, McCloy, John, McDonald, Benjamin S., and Lynn, Kelvin G.. 2017. "Spectroscopic and neutron detection properties of rare earth and titanium doped LiAlO2 single crystals". United States. doi: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, Jose 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 = ,
volume = 190,
place = {United States},
year = {2017},
month = {5}
}