Ce: LYSO crystal (chemical formula Ce: Lu2(1-x)Y2xSiO3, also known as cerium-doped yttrium lutetium silicate crystal) is a scintillation crystal with excellent comprehensive performance, which is widely used in the field of scientific research and industrial high-energy ray detection.  The absorption peak and excitation peak of LYSO crystal are mainly concentrated in 230-360nm, and the emission wavelength is in the range of 400-450nm, which matches well with the receiving sensitive wavelength range of photomultiplier tube (PMT) and silicon photodiode (PD).

Ce: LYSO crystal exhibits stable physical and chemical properties, high thermal conductivity, and resistance to harsh use environments. It shows excellent scintillating properties, for example, high scintillating efficiency, high light yield, and fast decay time (about 27ns). Ce: LYSO crystals are widely used in photomultiplier tubes, photoelectric counters, scintillation screens, and other devices. It is also used in the field of high-energy particle detection, such as alpha particles, beta rays, gamma rays, extreme ultraviolet rays, etc. Because of the excellent scintillation performance of Ce:YAG crystal, it is widely used in CT, scanning electron microscope SEM and other equipment. In particular, Ce: LYSO scintillation crystals and lutetium silicate Ce: LSO crystals have almost the same optical performance and scintillation performance. At the same time, due to the introduction of Y ions, the melting point of the crystal and the production cost are greatly reduced.  In recent years, it has been widely used in nuclear medicine imaging, radiation detection, and high-energy physics experimental research, which has promoted the development of a new generation of medical imaging equipment. Which has great significance in the prevention, diagnosis, and treatment of medical diseases.


Parameter

Material Features

Chemical formulaCe: LYSO
Density (g/cm3)7.15
Melting point (℃)2050
Hardness (Mho)5.8
HygroscopicNo
CleavageNo
Solubility (g/100gH2O)N/A
Crystal structureMono
Thermal expansion coeff(C-1)7.0*10-6

Scintillator Properties

Wavelength(Max. emission) (nm)410
Wavelength range (nm)TBA
Decay time (ns)40
Light yield (photons/keV)25
Light output relative to Nal(Tl)  (%)75
Refractive index1.82@410nm
Radiation length (cm)1.1
Optical transmission (um)TBA
Transmittance (%)TBA
Reflection loss/surface (%)TBA
Energy resolution (%)8
Neutron capture cross-section (barns)TBA
Anti-radiation1*108

Spertrum

Feature

  • High density
  • High light yield
  • Fast decay time
  • Chemically inert
  • High sensitivity
  • High energy resolution
  • Excellent scintillating efficiency

Application

  • γ-ray detection
  • X-ray medical imaging
  • Nuclear physics
  • Nuclear radiation detection
  • PET

Reference

[1]  Sabet H ,  Blackberg L ,  Ozsahin D U , et al. A sub-mm spatial resolution LYSO:Ce detector for small animal PET[C]// 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). IEEE, 2016.
[2]  Ding D ,  Liu B ,  Wu Y , et al. Effect of yttrium on electron–phonon coupling strength of 5d state of Ce3+ ion in LYSO:Ce crystals[J]. Journal of Luminescence, 2014, 154:260-266.
[3]  Wanarak C ,  Chewpraditkul W ,  Phunpueok A , et al. Luminescence and Scintillation Properties of Ce-Doped LYSO and YSO Crystals[J]. Advanced Materials Research, 2011, 199-200:1796-1803.

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