Growth and luminescent properties of Cs2HfCl6 scintillators doped with alkaline earth metals
Result description
Nondoped Cs2HfCl6 (CHC) and alkaline earth metal-doped CHC (AE:CHC) crystals were grown by the vertical Bridgman–Stockbarger method. The spectra of the AE:CHC under X-ray excitation were similar to those for the AE-free crystal. Thus, AE doping did not change emission wavelength of CHC. We determined the light outputs and energy resolutions of nondoped CHC and AE:CHC by measuring pulse-height spectra under 662-keV gamma-ray excitation of a 137Cs source. Nondoped CHC had a light output of 44000 photons/MeV and energy resolution of 5.2%, the 0.5 at% Sr:CHC had a light output of only 28000 photons/MeV and energy resolution of 10%. Scintillation decay also did not change. The nonproportional response values of light output versus gamma-ray energy did not improve in AE:CHC either. The doped AEs can be responsible for creation of defect trap levels which would hamper the carrier transport in CHC structure.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Growth and luminescent properties of Cs2HfCl6 scintillators doped with alkaline earth metals
Original language description
Nondoped Cs2HfCl6 (CHC) and alkaline earth metal-doped CHC (AE:CHC) crystals were grown by the vertical Bridgman–Stockbarger method. The spectra of the AE:CHC under X-ray excitation were similar to those for the AE-free crystal. Thus, AE doping did not change emission wavelength of CHC. We determined the light outputs and energy resolutions of nondoped CHC and AE:CHC by measuring pulse-height spectra under 662-keV gamma-ray excitation of a 137Cs source. Nondoped CHC had a light output of 44000 photons/MeV and energy resolution of 5.2%, the 0.5 at% Sr:CHC had a light output of only 28000 photons/MeV and energy resolution of 10%. Scintillation decay also did not change. The nonproportional response values of light output versus gamma-ray energy did not improve in AE:CHC either. The doped AEs can be responsible for creation of defect trap levels which would hamper the carrier transport in CHC structure.
Czech name
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Czech description
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Classification
Type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IEEE Transactions on Nuclear Science
ISSN
0018-9499
e-ISSN
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Volume of the periodical
65
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
2169-2173
UT code for WoS article
000442365000032
EID of the result in the Scopus database
2-s2.0-85048599664
Basic information
Result type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
OECD FORD
Condensed matter physics (including formerly solid state physics, supercond.)
Year of implementation
2018