| Autor: |
Malashkevich, G. E., Lapina, V. A., Semkova, G. I., Pershukevich, P. P., Shevchenko, G. P. |
| Předmět: |
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| Zdroj: |
JETP Letters; 3/25/2003, Vol. 77 Issue 6, p291, 4p |
| Abstrakt: |
The luminescence of Eu[sup 3+] ions implanted in ultradisperse diamond powders, activated by impregnating with a solution of Eu(NO[sub 3])[sub 3] · 6H[sub 2]O and heat-treated at various temperatures, is studied. A multiple increase in the efficiency of excitation in the charge-transfer band is observed for the [sup 5]D[sub 0] state of Eu[sup 3+] ions as compared to europium nitrate heat-treated similarly. This effect is explained by an increase in the degree of Eu-O bond covalency and a change in the activator coordination polyhedron due to the formation of chemical bonds Eu-O-C. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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