Luminescence and scintillation properties of BaF2-Ce transparent ceramic

作者：Luo, Junming; Sahi, Sunil; Groza, Michael; Wang, Zhiqiang; Ma, Lun; Chen, Wei^*; Burger, Arnold; Kenarangui, Rasool; Sham, Tsun-Kong; Selim, Farida A.

来源：Optical Materials, 2016, 58: 353-356.

DOI：10.1016/j.optmat.2016.05.059

• Barium fluoride
• Transparent ceramic
• Scintillation
• Photo peak
• Luminescence
• Scintillation decay time

Cerium doped Barium Fluoride (BaF2-Ce) transparent ceramic was fabricated and its luminescence and scintillation properties were studied. The photoluminescence shows the emission peaks at 310 nm and 323 nm and is related to the 5d-4f transitions in Ce3+ ion. Photo peak at 511 keV and 1274 keV were obtained with BaF2-Ce transparent ceramic for Na-22 radioisotopes. Energy resolution of 13.5% at 662 keV is calculated for the BaF2-Ce transparent ceramic. Light yield of 5100 photons/MeV was recorded for BaF2-Ce(0.2%) ceramic and is comparable to its single crystal counterpart. Scintillation decay time measurements shows fast component of 58 ns and a relatively slow component of 434 ns under 662 keV gamma excitation. The slower component in BaF2-Ce(0.2%) ceramic is about 200 ns faster than the STE emission in BaF2 host and is associated with the dipole-dipole energy transfer from the host matrix to Ce3+ luminescence center.

• 出版日期2016-8
• 单位南昌航空大学