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- W2373951978 abstract "The optical properties of Gd2O3∶Eu3+ nanoparticles immersed in different solvent were investigated.The 4f intraconfigurational transition peaks are nearly not changed by the surrounding media.The spontaneous emission lifetime of 5D0 of Eu3+ in Gd2O3 nanocrystalline is significantly affected by the surrounding media,mainly due to the refractive index of the media and the filling factor of the nanocrystalline.Different models predict substantially different dependences of radiative lifetime on the surrounding media.There are some measurements intended to discriminate these models have been given,and most experimental results tend to agree with the real-cavity model.Especially,recent measurements on the radiative lifetime of Eu3+ ion embedded in glass with varying refractive index also tend to agree with the real-cavity model in contrary to the general belief that the virtual-cavity model should be more relevant.With states of opposite parity,depends strongly on the environment and does not serve as a good examination of the real-and virtual models.To overcome the problem in 4f →4f transitions,Duan and Reid analyzed the lifetimes of 5d→4f transitions of Ce3+ ions in hosts with different refractive indices and the results maintained the textbook virtual-cavity model.However,there was no intention to answer the questions why most other experimental results agree with the real-cavity model,and which model should be used for a given situation.The two models that describe the radiative lifetime:virtual cavity and real-cavity model,are with respect to interstitial and substitutional impurities,respectively.In our experiment,the real-cavity model is more reliable." @default.
- W2373951978 created "2016-06-24" @default.
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- W2373951978 date "2008-01-01" @default.
- W2373951978 modified "2023-09-26" @default.
- W2373951978 title "The Spontaneous Radiation of Eu~(3+) in Gd_2O_3∶Eu~(3+) Nanocrystalline Surrounded by Different Media" @default.
- W2373951978 hasPublicationYear "2008" @default.
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