Acta Optica Sinica, Volume. 17, Issue 11, 1503(1997)
Studies on "Abnormal" Temperature Effect and Transition Mechanism of 5D0-7F0 Transition of Eu3+ in EuCl3·6H2O
The transition mechanism and “abnormal” temperature effect of 5D 0 - 7F 0 transition of Eu 3+ in EuCl 3·6H 2O are studied. By analysing the intensity ratios of the 5D 0 - 7F 0 transition to the lowest energy level line of the 5D 0 - 7F 2 transition of fluorescence spectra at different tempertures, it is found that 7F 2 state (mainly the lowest energy level) can couple with 7F 0 state by four 245 cm -1 phonons. The 7F 0 state becomes a mixed state, so the “forbidden” 5D 0 - 7F 0 transition can be allowed and its oscillator strength varies with temperature. Therefore, the transition mechanism and the relationship between the oscillator strength of 5D 0 - 7F 0 transition in EuCl 3·6H 2O and temperature are well explained.
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[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Studies on "Abnormal" Temperature Effect and Transition Mechanism of 5D0-7F0 Transition of Eu3+ in EuCl3·6H2O[J]. Acta Optica Sinica, 1997, 17(11): 1503