ABSTRACT The thermally stimulated luminescence and IR absorption spectra of MgO:Mn2+ crystals irradiated in different reactors have been studied. It has been shown that dependence of TSL peaks (450 and 550 K) and optical absorption bands (3290, 3720 and 1600 cm-1) on neutron fluence correlate. The trend of these changes in the same fluence range (1014-1017 n/cm2) depends both on the initial state of the crystal and on the irradiation source, which may be explained by the “small dose effect”.
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nullM. Abramishvili, Z. Akhvlediani, M. Galustashvili, G. Dekanozishvili, T. Kalabegishvili, V. Kvatchadze and V. Tavkhelidze, "Peculiarities of Radiation Effects in MgO:Mn2+ Crystals," Journal of Modern Physics, Vol. 2 No. 8, 2011, pp. 841-844. doi: 10.4236/jmp.2011.28099.
 S. Dolgov, T. K?rner, A. Lushchik, A. Maaroos, N. Mironova-Ulmane and S. Nakonechny, “Thermoluminescence Centers Created Selectively in MgO Crystals by Fast Neutrons,” Radiation Protection Dosimetry, Vol. 100, No. 1-4, 2002, pp. 127-130.
 V. Kvachadze, G. Dekanozishvili, T. Kalabegishvili, V. Vylet, M. Galustashvili, Z. Akhvlediani, N. Keratishvili and D. Zardiashvili, “Thermally Stimulated Luminescence of MgO Ceramic and Single Crystal Samples Irradiated in Reactor,” Radiation Effects and Defects in Solids, Vol. 162, No. 1, 2007, pp. 17-24.
 V. Kvatchadze, G. Dekanozishvili, M. Abramishvili, Z. Akhvlediani, M. Galustashvili and T. Kalabegishvili, “Thermoluminescence and Absorption Spectra of MgO Crystals Irradiated by Fast Neutron Fluxes of Low Intensity,” Physica Status Solidi (A), Vol. 206, No. 11, 2009, pp. 2581-2585. doi:10.1002/pssa.200925016
 R. Atabekyan, V. Vinetskii, V. Gevorkyan, R. Ezoyan and G. Eritsyan, “Optical Small Effect in the Radiation State Physics,” Pis’ma v Zhurnal Tekhnicheskoi Fiziki, Vol. 9, No. 23, 1983, pp. 1448- 1451.
 M. G. Abramishvili, K. A. Garibashvili, A. I. Kurasbediani, V. G. Kvachadze, Z. G. Akhvlediani, M. G. Galustashvili, T. L. Kalabegishvili and S. Sobolevskaya, “The Optical and Paramagnetic Absorption Spectra of MgO: Mn Single Crystals Irradiated in a Reactor,” Radiation Effects and Defects in Solids, Vol. 159, No.10, 2004, pp. 543-550. doi:10.1080/10420150412331326921
 P. Kofstad, “Deviration from the Atoichiometry, Diffusion in the Simple Metallioc Oxidex,” Mir, Moscow, 1975.
 M. G. Abramishvili, Z. G. Akhvlediani, M. G. Galustashvili, T. L. Kalabegishvili, A. I. Kurasbediani and V. G. Kvachadze, ”Radiation-Induced Alterations of MgO: IR Absorption Spectra in a Wide Interval of Wave Numbers,” Radiation Effects and Defects in Solids, Vol. 160, No. 6, 2005, pp. 237-224.