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“The ratio of ED to MD transitions is less than 1 indicates that the trivalent rare earth ions occupy the symmetry site nature of the host lattice. On the contrary, the trivalent rare earth ions occupy the asymmetry site nature of the host lattice. Obviously, the ED transition (609 nm) is stronger than the MD transition (591 nm). The ED/MD values for curve a, b, c and d are 1.47, 1.62, 1.57, and 1.36, respectively. Therefore, Eu3+ ions occupy asymmetry site in Y2P4O13 lattice.” 这段话有问题 要求重写 你们看看怎么修改下 大概意思：当 ED 跃迁强度和MD 跃迁强度的跃迁强度小于1时，说明三价稀土离子占据对称性的位置，反之，如果此比值大于1，三价稀土离子占据非对称性的位置。明显，ED 跃迁强度高于MD 跃迁强度。ED/MD 的比值对于曲线 a, b, c ， d 分别是1.47, 1.62, 1.57, and 1.36,。因此Eu3+占据非对称性的位置 |
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liujun2008(liouzhan654代发): 金币+1, 感谢交流 2017-12-01 13:49:52
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liujun2008(liouzhan654代发): 金币+1, 感谢交流 2017-12-01 13:49:52
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2楼2017-12-01 10:24:36
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liujun2008: 金币+20, ★有帮助, 谢谢 2017-12-01 17:19:48
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liujun2008: 金币+20, ★有帮助, 谢谢 2017-12-01 17:19:48
| It is wellknown that the trivalent rare earth ions occupy the symmetry sites in the host lattice as the transition intensity ratio of ED to that of MD is no more than 1; otherwise, they hold the asymmetry ones. It is Obviously from the experimental results that the ED transition intensity at 609 nm is stronger than that of the MD's at 591 nm. Therefore, the ED/MD values for curve a, b, c and d are 1.47, 1.62, 1.57, and 1.36, respectively, that is to say, the Eu3+ ions take up the asymmetry sites in Y2P4O13 lattice. |
3楼2017-12-01 14:26:49