Scintillation properties of Tm-doped Lu3Al5O 12 single crystals

Makoto Sugiyama, Yutaka Fujimoto, Takayuki Yanagida, Daisuke Totsuka, Yuui Yokota, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Using the micro-pulling-down (μ-PD) method, Tm-doped Lu 3Al5O12 (Tm:LuAG) single crystals were grown to examine their scintillation properties. In transmittance spectra, they exhibited about 80% transparency in the wavelengths longer than 320 nm and five absorption lines due to Tm3+ 4f-4f transitions were observed. 241Am α-ray excited radioluminescence spectra were measured and intense 4f-4f emission peaks were observed with the host emission. When excited by 137Cs γ-Ray to obtain pulse height spectra, Tm 1% doped LuAG showed the highest light yield coupled with a photomultiplier (PMT) or a silicon avalanche photodiode (Si-APD). The light yield was estimated to be 5800 and 7300 photons/MeV for PMT and Si-APD, respectively. Decay time profiles consist of two exponential components and the fast and slow components are considered to be attributed to the host and the combination of the host and Tm3+ 4f-4f emission, respectively.

Original languageEnglish
Pages (from-to)439-443
Number of pages5
JournalOptical Materials
Issue number2
Publication statusPublished - 2011 Dec


  • LuAG
  • Scintillator
  • Single crystal


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