Fluorescence of Trivalent‐Europium‐Doped Yttrium Oxysulfide

摘要: The fluorescence spectrum of trivalent europium in the site C3υ symmetry polycrystalline Y2O2S:Eu3+ is investigated region 4000–9000 A. Of total 363 transitions between crystal components J = 0 to J = 3 states 5D and those J = 6 7F, almost two thirds are observed. Transitions originating 5D3 state Eu3+ particularly intense at 77°K. Some lines unidentified levels, higher than energy, also present. Thirty‐nine 44 5D0–3, 7F0–6 identified. perhaps an optimal case identification degeneracies without benefit additional information afforded by polarization studies or Zeeman effect. From a consideration all possible assignments species for levels 7F1–4 systematic fashion, small number self‐consistent sets crystal‐field parameters obtained. Intensity data reduce t...