Ce:YAG scintillator

Figure 9.13 shows examples of ablation patterns taken in a single shot and observed by (a) an optical microscope and (b) an atomic force microscope (AFM). The diameter of the circular hole is approximately 2 pm, which agrees well with the Ce YAG scintillator experiment. 

We used an imaging system as shown in Fig. 9.6 to observe the focal spot of the harmonic beams. The harmonics were focused onto a Ce YAG scintillator by the ellipsoidal mirror. Figure 9.15 shows the 1/e2 beam spot size... 

Although Nd YAG requires large, defect-free single crystals [89], polycrystalline ceramics are cheaper to manufacture and there is increasing use of YAG ceramics [90] as scintillators for radiation detection, for example Ce-doped YAG ceramics [91, 92], In this case, the luminescence comes both from the activation of the Ce ion, with additional UV contribution, and from the YAG host itself. 

E. Zych, et al., Luminescence properties of ce-activated yag optical ceramic scintillator materials. J. Luminescence 75(3), 193-203 (1997). 

Apart from the applications mentioned earlier, it is worth mentioning the extended usage of YAG Ce and derived compositions in phosphors for white light LED, which in the last decade gave way to a new generation of solid-state lighting, see reviews Wu et al. (2007) and Ye et al. (2010) and references therein. Also a ceramic version of YAG Ce has been reported for such an application recently (Nishiura et al. 2011). Scintillation ceramics prepared from nanopowder precursors and... 

East optical ceramics based on Ce-doped YAG have been reported [114]. Scintillation and Imninescence properties of the highly dense transparent YAG Ce ceramics were compared with those of a single crystal. Both the ceramics and the single crystal exhibited a dominant decay of 85 ns, when they were excited with gamma rays. At the same time, the ceramics also showed a new rapid component of... 

Yanagida T, Roh T, Takahashi H, Hirakuri S, Kokubun M, Makishima K et al (2007) Improvement of ceramic YAG(Ce) scintillators to (YGd)3Al50i2(Ce) for gamma-ray detectors. Nucl Instrum Methods Phys Res Sect A Accelerators Spectrometers Detectors Assoc Equip 579 23-26... 

Zych E, Brecher C, Wojtowicz AJ, Lingeitat H (1997) Luminescence proptaties of Ce-activated YAG optical ceramic scintillator materials. J Lumin 75 193-203... 

Mihokova E, Niki M, Mares JA, Beitlerova A, Vedda A, Nejezchleb K et al (2007) Luminescence and scintillation properties of YAG Ce single crystal and optical ceramics. J Lumin 126 77-80... 

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