Fluorescence of Mn2+ in CaCO3 |
| |
| Authors: | GM Aguilar MI Osendi |
| |
| Institution: | Universidad Autónoma de Madrid, Dpto. Optica y Estructura de la Materia, Facultad de Ciencias, C-IV, Cantoblanco (Madrid-34), Spain |
| |
| Abstract: | The fluorescence of Mn2+ ion as impurity in CaCO3 has been investigated. Emission bands from the 4D(Eg), 4D(T2g) and 4G(T1g) levels have been observed. The analysis of excitation and emission spectra has allowed to obtain the values of field strength (Dq) for the excited energy levels of Mn2+ in CaCO3 lattice. The temperature dependence of excitation and emission spectra yield an activation energy for thermal quenching of luminescence very close to theoretical calculation. The behaviour of luminescence lifetime with temperature has also been obtained. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
