Crystal Growth and Characterization of Calcium Metaborate Scintillators
Crystal Growth and Characterization of Calcium Metaborate Scintillators
复制标题
偏硼酸钙闪烁体的晶体生长和表征
DOI：
10.1016/j.nima.2012.11.002
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
藤本裕
中科院分区：
文献类型：
--
作者：
H. Akamatsu;Y. Kumagai;F. Oba;K. Fujita;K. Tanaka;I. Tanaka;藤本裕
采用射频加热提拉法生长了偏硼酸钙CaB 2 O 4单晶。在这些晶体中，观察到沿生长方向沿着的平面解理。晶体具有80%的透明度，并且在190- 900 nm波长范围内没有检测到吸收带。在241 Am 5.5MeV α射线激发下，CaB 2 O 4的辐射发光光谱在300- 400 nm处有一个宽的本征发光峰，该发光峰可能是晶格缺陷或激子发射的结果。根据脉冲高度谱，当被来自252 Cf源的中子照射时，闪烁光产生大约3200个光子/中子（ph/n）。
Calcium metaborate CaB2O4single crystals were grown by the Czochralski (CZ) method with the radio-frequency (RF) heating system. In these crystals, a plane cleavage was observed along the growth direction. The crystals had an 80% transparency, and no absorption bands were detected in the 190–900nm wavelength range. The241Am 5.5MeV α-ray-excited radioluminescence spectrum of CaB2O4demonstrated a broad intrinsic luminescence peak at 300–400nm, which originated from the lattice defects or an exciton-based emission. According to the pulse height spectrum, when irradiated by neutrons from a252Cf source, the scintillation light yielded approximately 3200 photons per neutron (ph/n).