Characterization of LFS-3 scintillator in comparison with LSO
Characterization of LFS-3 scintillator in comparison with LSO
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DOI：
10.1016/j.nima.2010.12.094
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发表时间：
2011-10-01
影响因子：
1.4
通讯作者：
Owczarczyk, J.
中科院分区：
文献类型：
--
作者：
Grodzicka, M.;Moszynski, M.;Owczarczyk, J.
本文研究了LFS-3闪烁体在伽马能谱中的性能，并与著名的LSO晶体进行了比较。这些测试包括光电子数量、能量分辨率和非均衡性方面的光输出测量。时间分辨率是在符合实验中用511keV湮没量子从Na-22伽马源测量的。根据Thomas-Bollinger单光子法获得的时间谱，计算了光脉冲的衰减时间常数。在13.9Gbq Am-241强光源照射晶体约30ms后，测得余辉。与LSO相比，LFS-3提高了Cs-137对662条关键伽马射线的能量分辨率，缩短了衰变时间常数，提高了时间分辨率。对于Cs-137的能量分辨率为662keV的LFS-3，衰变时间和时间分辨率分别为7.66+/-0.23%、40.5+/-1.2 ns和161+/-5ps，而对于LSO，这些参数分别为8.13+/-0.23%、43.9+/-1.3 ns和173+/-5ps。研究表明，LFS-3晶体是LSO晶体的优良替代品。(C)2010爱思唯尔B.V.保留所有权利。
Performance of Lutetium Fine Silicate (LFS-3) scintillator in gamma-ray spectrometry has been investigated in comparison with the well known LSO crystal. The tests covered measurements of light output in terms of number of photoelectrons, energy resolution and non-proportionality. Time resolution was measured in coincidence experiments with 511 keV annihilation quanta from a Na-22 gamma source. Decay time constants of the light pulse were calculated on the basis of timing spectra obtained using Thomas-Bollinger single photon method. Afterglow was measured about 30 ms after the crystal was irradiated by a strong 13.9 GBq Am-241 source. Improvement in the energy resolution for 662 key gamma-rays from Cs-137, shorter decay time constants and better time resolution were observed in case of LFS-3, when compared with LSO. For LFS-3 energy resolution for 662 keV from Cs-137, decay time and time resolution were equal to about 7.66 +/- 0.23%, 40.5 +/- 1.2 ns and 161 +/- 5 ps, respectively, whereas for LSO the same parameters were equal to 8.13 +/- 0.23%, 43.9 +/- 1.3 ns and 173 +/- 5 Ps, respectively. The study showed that LFS-3 crystal is an excellent substitute for LSO crystal. (C) 2010 Elsevier B.V. All rights reserved.