铀(Ⅵ)在氟化钙基体中的低温荧光光谱

FLUORESCENCE OF U(Ⅵ) IN CaF2 MATRIX.

摘要: <正> 本文以氮分子激光器作为激发光源,在78—300°K温度范围内测定了铀(Ⅳ)在氟化钙基体中的荧光光谱、非声子线跃迁(5215A)和5284A的声子模的荧光寿命以及强度与温度之间的关系。

Abstract: The green fluorescence of U(Ⅵ) in CaF2 matrix was investigated in the temperature range 78-300·K with a N2 laser as an excitation source. The fluorescence spectrum can be interpreted as a no-phonon line with vibrational structure on the side. The temperature dependence of the no-phonon line is in agreement with theoretical calculation. The fluorescence lifetime of no-phonon line transition increases with decreasing the temperature and is 170 μs and 560 μs at 300·K and 78·K respectively.