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Growth and characterization of strontium metaborate scintillators

机译：偏硼酸锶闪烁体的生长和表征

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The undoped and 0.5% Ce~(3+)-doped strontium metaborate SrB_2O_4 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 Ce~(3+)-doped SrB_2O_4 crystal showed absorption band around 240-320 nm, which is corresponding to the 4f-5d transition of Ce~(3+). Intense emission band at 375 nm due to the Ce~(3+) 5d-4f transition was observed under ~(241)Am 5.5 MeV α-ray excitation. The scintillation decay time showed fast (50 ns) and slow (1430 ns) components ascribed to the Ce~(3+) 5d-4f transition and lattice defect in the crystal, respectively. The scintillation light yield of Ce~(3+)-doped SrB_2O_4 was calculated to be about 1000 ph under ~(252)Cf irradiation.
机译：采用射频（RF）加热系统微拉法成功地生长了未掺杂和掺杂Ce〜（3+）的Ce〜（3+）掺杂0.5％SrB_2O_4单晶，并研究了其闪烁特性，包括光学性质和辐射响应。晶体。掺Ce〜（3+）的SrB_2O_4晶体在240-320 nm附近出现吸收带，对应于Ce〜（3+）的4f-5d跃迁。在〜（241）Am 5.5 MeVα射线激发下，观察到由于Ce〜（3+）5d-4f跃迁而在375 nm处产生的强发射带。闪烁衰减时间分别显示了快（50 ns）和慢（1430 ns）的成分，分别归因于晶体中Ce〜（3+）5d-4f的跃迁和晶格缺陷。经Ce〜（3+）掺杂的SrB_2O_4在〜（252）Cf辐照下的闪烁光输出经计算约为1000 ph / n。

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