YBO_3∶Eu中发光中心的格位与晶场拟合

通过对溶胶 凝胶法制备的YBO3∶Eu的光致发射谱进行分析 ,证实Eu3+ 可能占据两种晶场格位。并采用晶场拟合的方法定量确认这两种晶场格位的对称性分别为C3v和D3,这种指认下能级的拟合结果以及点群选择律和实验结果相当吻合。

TiO_2单晶的表面光电压谱研究

Tio2(001) surface of rutile TiO2 single crystals was studied by surface photovoltage spectrum (SPS) and electrical field-induced surface photovoltage spectrum (EFISPS)techni(lue. The two SPS responses peak at 360 nm and 410 nm were identified as direct transition and indirect transition of TiO2(001) plane, respectively. And it was found that the indirect transition of TiO2 was very sensitive to the external electrical field. These results indicate that SPS and EFlSPS are effective means to study the opto-electrical characteristics ofsemico nd uctors.

晶体场中铁族离子的轨道分裂

用群论和量子力学的方法，推断铁族离子的３ｄ轨道在不同对称性的晶体场中的分裂，进而讨论３ｄ电子在分裂轨道上的分布以及分裂能．再从３ｄ轨道的分裂出发，由量子力学计算有关能级和跃迁的吸收谱的结果，可得到矿物某些性质的微观机制的信息，如矿物颜色的多色性的原因等。