Growth and characterization of strontium metaborate scintillators
Growth and characterization of strontium metaborate scintillators
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DOI：
10.1016/j.optmat.2011.04.016
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发表时间：
2011-12-01
影响因子：
3.9
通讯作者：
Yoshikawa, Akira
中科院分区：
文献类型：
--
作者：
Fujimoto, Yutaka;Yanagida, Takayuki;Yoshikawa, Akira
采用射频加热微提拉法成功生长了未掺杂和0.5%Ce ~（3+）掺杂偏硼酸锶SrB_2 O_4单晶，并对其闪烁特性进行了研究。Ce ~（3+）掺杂的SrB_2 O_4晶体在240-320 nm处有明显的吸收带，对应于Ce ~（3+）的4f ~ 5d跃迁。在Am-241 5.5 MeV α射线激发下，观察到Ce ~（3+）5d-4f跃迁产生的375 nm强发射带。闪烁衰减时间显示快（50 ns）和慢（1430 ns）的成分归因于Ce 3+的5d-4f跃迁和晶体中的晶格缺陷，分别。Ce ~（3+）掺杂的SrB_2 O_4在Cf-252照射下的闪烁光产额约为1000 ph/n。(C)2011 Elsevier B. V.保留所有权利。
The undoped and 0.5% Ce3+-doped strontium metaborate SrB2O4 single crystals has been grown successfully by micro-pulling down method with radio frequency (RF) heating system, and scintillation characteristics including optical properties and radiation response were studied for these crystals. The Ce3+-doped SrB2O4 crystal showed absorption band around 240-320 nm, which is corresponding to the 4f-5d transition of Ce3+. Intense emission band at 375 nm due to the Ce3+ 5d-4f transition was observed under Am-241 5.5 MeV alpha-ray excitation. The scintillation decay time showed fast (50 ns) and slow (1430 ns) components ascribed to the Ce3+ 5d-4f transition and lattice defect in the crystal, respectively. The scintillation light yield of Ce3+-doped SrB2O4 was calculated to be about 1000 ph/n under Cf-252 irradiation. (C) 2011 Elsevier B.V. All rights reserved.