5d→4f Radiative Transition Probabilities of Ce^<3+> and Eu^<2+> in Crystals
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Formulation of radiative transition probabilities of 5d'-+4f' of' Co" andof 4f '5d-+4f' of Eu" in a cubic crystal field is performed using pur'e 5d and 4fwavefunctions. The emitting state of Ce" is 5#(7'.) or 5#(7F). The ccupled statesof the 4f '('F ) core and 5d (7. or e) are taken as the emitting states of Eu". Linestrengths are calculated for all possible transitions, and transition probabilitydistributions over the terminal states are obtained. The estimated ra.diative life-times of Ce" are about a half oi' the observed ones. For Eu", th?e calculatedlifetimes are about thirty times as long as the observed ones. The theory suggeststhat Ce" has the largest radiative transition probability in the rar?c-earth tonsexhibiting 5d -4f luminescence.
- 社団法人日本物理学会の論文
- 1980-04-15
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