摘要
K2YF5 crystals doped Sm3+ ions were synthesized under hydrothermal condition. The absorption, luminescence spectra, and lifetimes of K2YF5:Sm3+ were measured at room temperature. The results were analyzed using Judd-Ofelt (JO) theory giving the values of three 惟2, 惟4, and 惟6 intensity parameters. Using these JO parameters as well as from the emission, various radiative parameters such as transition probabilities (AR), radiative lifetime (喂R), calculated branching ratios (尾R), measured branching ratios (尾mes), and stimulated emission cross-sections (蟽位p) have been calculated for 4G5/2 excited level.