Dresden 2026 – scientific programme

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FM: Fachverband Funktionsmaterialien

FM 7: Crystal Defects and Real Structure Physics in Diamond and Functional Materials I

FM 7.6: Talk

Tuesday, March 10, 2026, 11:00–11:15, BEY/0E40

Creation of Color Centers in Magnesium Fluoride Single Crystals by Irradiation with MeV Heavy Ions — •Ayman El-Said — Physics Department and Interdisciplinary Research Center for Advanced Materials, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia

The irradiation of ionic halide single crystals with MeV heavy ions can lead to the creation of various types of color centers [1]. Here, MgF2 single crystals were irradiated with MeV heavy ions of different energies and fluence [2]. UV-Vis spectroscopic measurements demonstrate the existence of F1-, F2-, and F3-centers due to ion irradiation. The type, concentration and creation efficiency of the observed color centers are studied in terms of ion fluence and energy loss. The results are not only of high importance for understanding the creation mechanism of the induced color centers but also for the degradation of optical materials in high-altitude and space environments.

Acknowledgements: Parts of this research were carried out at the Ion Beam Center at the Helmholtz-Zentrum Dresden-Rossendorf e. V., a member of the Helmholtz Association. Ayman S. El-Said acknowledges the support by KFUPM, Saudi Arabia (Project: ISP24236).

[1] K. Schwartz, C. Trautmann, A.S. El-Said, R. Neumann, M. Toulemonde, W. Knolle, Phys. Rev. B 70, 184104 (2004). [2] A.S. El-Said, Rad. Phys. and Chem. 227, 112369 (2025).

Keywords: Color Centers; Defects; Heavy ions