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- W2040252722 abstract "By means of Zeeman anisotropy fluorescence (ZAF) and its field dependence (up to 55.8 kG), the authors have investigated the 4.2 K narrow-line fluorescence of KCl:${mathrm{Sm}}^{2+}$ and identified some hitherto unreported ${mathrm{Sm}}^{2+}$ sites. The strong no-field line at 7693.5 AA{} ($^{5}D_{0}ensuremath{rightarrow}^{7}F_{3}$) and a very weak no-field line at 8742.8 AA{} ($^{5}D_{0}ensuremath{rightarrow}^{7}F_{5}$) are shown to be of ${C}_{3v}$ symmetry origin. The 24.5-kG ZAF pattern observed in the 7696-7700-AA{} ($^{5}D_{0}ensuremath{rightarrow}^{7}F_{3}$) region has been identified to originate from a type-II ${C}_{s}$ site. The 26.5-kG ZAF patterns of the ${C}_{3v}$ no-field line at 7693.5 AA{} and the type-I ${C}_{s}$ no-field line at 7694.5 AA{} overlap in the 7693-7695.3-AA{} region, and are elucidated through the field dependence of their Zeeman components. Characteristic radiative lifetimes of the $^{5}D_{0}$ level in several ${mathrm{Sm}}^{2+}$ symmetry types have been determined from dominant transitions to the $^{7}F_{J}$ ($J<~4$) levels. There are two distinct ${C}_{4v}$ sites: one with a lifetime of 9.5 msec, and the other 11.2 msec. ${C}_{2v}$ and type-I ${C}_{s}$ sites have lifetimes of 10.5 and 10.8 msec, respectively, which are indistinguishable within the experimental error. The role of ${mathrm{O}}^{2ensuremath{-}}$ compensation of ${mathrm{Sm}}^{2+}$ in addition to ${mathrm{K}}^{+}$ vacancy compensation in KCl is discussed in terms of these findings." @default.
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- W2040252722 date "1971-01-01" @default.
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- W2040252722 title "Zeeman Anisotropy Fluorescence Spectroscopy, Characteristic Radiative Lifetimes, and Novel Site Symmetries in KCl:<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>Sm</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>" @default.
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- W2040252722 doi "https://doi.org/10.1103/physrevb.3.50" @default.
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