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采用扩散法在KCl:Li:Na晶体中形成了浓度适当、分布均匀的F心.以汞灯进行色心转型,获得了F_A(II)心和F_B(II)心.测量77K时晶体的吸收谱,观察到明显的双峰结构.在相同的温度下测得晶体的荧光谱.F_b(II)心和F_A(II)心的荧光峰分别为2.49μm和2.66μm.采用点离子模型并在离子尺度修正中计入次近邻离子的贡献,计算了KCl晶体F_A(Li)心的非微扰态,然后以微扰法计算了F_A(Li)心的能级位置.计算值与实验值比较,结果令人满意. 相似文献
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由宽波段双光子泵浦的铷光解离受激发射光谱 总被引:1,自引:0,他引:1
本文报导了由宽波段双光子泵浦铷分子,使之光解离而产生位于2.25、2.29和2.73μm的受激辐射的实验结果。当氮分子泵浦的染料激光输出从6500A扫描到7050A时,始终可探测到分别对应于6P_(3/2)—4D_(5/2)、6P_(1/2)—4D_(3/2)和6P_(3/2)—6S跃迁的三条受激发射线。文中对上述结果和机理进行了讨论。 相似文献
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Observation of the 532 nm-laser-induced fluorescence spectra of two kinds of Cr:Mg2SiO4 crystalline samples grown in different atomsphere are reported. The experiments were con-ducted at both room temperature and liquid-nitrogen temperature. The fluorescence spectra of the two kinds of samples were different with respect to the polarizing direction of the inducing leser, and two emission bands with different polarized characters and various en-hancement in intensity at low temperatures were also found. In the light of the calculated results by Ms-Xα method, the main experimental results are explained. 相似文献
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