TY - JOUR
T1 - Photoluminescence and scintillation properties of Yb2+-doped ACaCl3 (A = Cs, Rb, K) crystals
AU - Mizoi, Kohei
AU - Arai, Miki
AU - Fujimoto, Yutaka
AU - Nakauchi, Daisuke
AU - Koshimizu, Masanori
AU - Yanagida, Takayuki
AU - Asai, Keisuke
N1 - Funding Information:
This research was supported by a Grant-in-Aid for Scientific Research (A) (No. 18H03890 , 2018–2021) funded by the Japan Society for the Promotion of Science . This research was partially involved in the Cooperative Research Project of the Research Center for Biomedical Engineering, Ministry of Education, Culture, Sports, Science and Technology.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11
Y1 - 2020/11
N2 - Photoluminescence and scintillation properties are reported for ACaCl3:Yb2+ (A = Cs, Rb, K) crystals that were grown by a self-seeding solidification method. Single emission bands centered at approximately 445 nm with two decay time constants of approximately 10 and 200 μs were observed for photoluminescence and scintillation and are attributed to fast and slow components of spin-forbidden Yb2+ 5d–4f transitions, respectively. Light yields of ACaCl3:Yb2+ were estimated to be (3,600–5,200) photons/MeV on the basis of pulse height spectra. If the slow components are considered, they were estimated to be (59,000–75,000) photons/MeV, which are higher than previously reported Yb2+-doped scintillators and those used in X-ray CT scanners (CsI:Tl+, CWO, and GOS). The developed ACaCl3:Yb2+ (A = Cs, Rb, K) scintillator materials have the potential to replace conventional scintillators in current-mode detectors due to their high light yields.
AB - Photoluminescence and scintillation properties are reported for ACaCl3:Yb2+ (A = Cs, Rb, K) crystals that were grown by a self-seeding solidification method. Single emission bands centered at approximately 445 nm with two decay time constants of approximately 10 and 200 μs were observed for photoluminescence and scintillation and are attributed to fast and slow components of spin-forbidden Yb2+ 5d–4f transitions, respectively. Light yields of ACaCl3:Yb2+ were estimated to be (3,600–5,200) photons/MeV on the basis of pulse height spectra. If the slow components are considered, they were estimated to be (59,000–75,000) photons/MeV, which are higher than previously reported Yb2+-doped scintillators and those used in X-ray CT scanners (CsI:Tl+, CWO, and GOS). The developed ACaCl3:Yb2+ (A = Cs, Rb, K) scintillator materials have the potential to replace conventional scintillators in current-mode detectors due to their high light yields.
KW - Luminescence
KW - Scintillator
KW - Ytterbium
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U2 - 10.1016/j.jlumin.2020.117521
DO - 10.1016/j.jlumin.2020.117521
M3 - Article
AN - SCOPUS:85089389732
VL - 227
JO - Journal of Luminescence
JF - Journal of Luminescence
SN - 0022-2313
M1 - 117521
ER -