Crystal growth and scintillation properties of Nd-doped Lu3Al5O12 single crystals with different Nd concentrations

Growth and scintillation properties of Nd-doped Lu3Al5O12 single crystals by Czochralski and micro-pulling-down methods

“…Parity-allowed Ce 3 þ and Pr 3 þ 5d-4f emission and Yb-doped materials show nanoseconds decay time [2,3,7]. On the contrast, parity-forbidden Nd 3 þ 4f-4f emission showed microseconds decay time [6]. Unlike PET, which requires fast ns decay time, in X-ray radiology such as X-ray CT or X-ray security in the airport, dozens of microseconds decay time is acceptable because they read out a signal as an integrated current generally from Si photodiode based detectors [8][9][10].…”

“…Recently, our group developed Nd-doped LuAG (Nd:LuAG) single crystals with the micro-pulling-down (m-PD) method [6]. In laser materials, Nd-doped materials, such as Nd:YAG and Nd:YVO 4 are well known.…”

“…However, scintillation characteristics of Nd 3 þ 4f-4f transitions had not been studied sufficiently. Based on this background our group chose Nd ions as an emission center and we evaluated scintillation characteristics of the m-PD grown Nd:LuAG [6]. Parity-allowed Ce 3 þ and Pr 3 þ 5d-4f emission and Yb-doped materials show nanoseconds decay time [2,3,7].…”

Dopant segregation in rare earth doped lutetium aluminum garnet single crystals grown by the micro-pulling down method

“…Our group recently reported scintillation properties of Nd:LuAG single crystals grown by the m-PD method [8]. The scintllator showed emission peaks originated from 4f-4f transitions of Nd 3 þ ions in the visible region and the light yield was 7600 photons/MeV by the irradiation of gamma-ray.…”

Actively Q-switched laser performance of Nd:LuAG crystal with birefringence compensator

“…In 2011, Ding et al (2011) synthesized a novel nanoscaled-Nd:LuAG with fluorescence lifetime of 320 ls and emission cross-section (from 4F 3/2 to 4I 11/2 ) of 28.9910 -20 cm 2 . The scintillation properties of the Nd:LuAG crystal have also been evaluated (Sugiyama et al 2011). The physical and optical properties of Nd:LuAG crystal have been proven to be similar as that of Nd:YAG crystal (Brown et al 2014).…”