论文标题
无居和欧盟，NA共掺杂的LICAALF6闪烁晶体：顺磁中心，电荷诱捕和能量转移特性
Undoped and Eu, Na co-doped LiCaAlF6 scintillation crystals: paramagnetic centers, charge trapping and energy transfer properties
论文作者
论文摘要
通过电子顺磁共振，放射性发光和以相关方式应用的热刺激的发光技术，研究了Licaalf6未源和欧盟Na共掺杂的单晶。暴露于X射线辐照的未掺杂样品表现出两个类似孔的电荷捕获中心的创建，即形式的分子离子：CLF-和F2^ - F2^ - 二聚体。它们的陷阱深度和频率因子被确定如下：ET1 = 1.7 eV和ET2 = 1.1。 EV分别用于陷阱深度和f〜10^13 s-1的频率因子。已经发现，在LICAALF6中，Europium Prevable Charge状态为2+：EU，NA样本，但是，也存在一些EU3+的数量。此外，有两个EU2+中心：主导的EU2+（CA）和低结合EU2+（li）。后者的量很容易由钠混合物支配，而前者对NA共同兴奋剂不敏感。欧盟和NA共同兴奋剂影响了LICAALF6主机中的缺陷分布和掺入。
Single crystals of LiCaAlF6 undoped and Eu, Na co-doped were studied by electron paramagnetic resonance, radioluminescence and thermally stimulated luminescence techniques applied in a correlated manner. The undoped samples exposed to X-ray irradiation exhibited two hole-like charge trapping centers creation, the molecular ions of the form: ClF- and F2^- - F2^- dimer. Their trap depths and frequency factors were determined as follows: Et1=1.7 eV and Et2=1.1. eV for trap depths and f ~ 10^13 s-1 for frequency factor, respectively. It was found that the europium preferable charge state is 2+ in the LiCaAlF6:Eu,Na samples, however, some amount of the Eu3+ is also present. Moreover, there were two Eu2+ centers: the dominating Eu2+(Ca) and the low-content Eu2+(Li). The amount of the latter is easily governed by the sodium admixture while the former is insensitive to the Na co-doping. Eu and Na co-doping affected the defects distribution and incorporation in the LiCaAlF6 host.
