| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1686486 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2006 | 4 Pages |
Abstract
Ionoluminescence emission spectra induced by 2 MeV protons are reported for a range of carbonates. A major feature in these spectra, are the Mn2+ luminescence centres that appear within all the samples. The emission wavelengths for the Mn2+ are linearly correlated to the metal–oxygen bonding length, both in rhombohedral and orthorhombic lattices for the minerals studied. The Mn2+ band, is in each case related to the corresponding energy level diagram of the mineral’s crystal lattice, as this ion perturbs the crystal field term, which for emission in rhombohedral calcite has a value of 1000 cm−1, and for orthorhombic sites in aragonite is 1200 cm−1.
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Authors
H. Calvo del Castillo, J.L. Ruvalcaba Sil, M.A. Álvarez, P. Beneitez, M.A. Millán, T. Calderón,