Radiation and spectral characteristics of sapphire crystals produced by various methods

Apanasenko, A. L.; Kazakov, N. A.; Kulagin, N. A.; Landar, S. V.; Litvinov, L. A.; Ovechkin, A. E.

doi:10.1007/bf00663836

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…So, it is indispensable for knowledge of its service performance under various space-radiation environments [8,9]. Radiation and spectral characteristics of sapphire produced by various methods have been studied [10][11][12]. Electron paramagnetic resonance (EPR) spectroscopy has also been employed to study the irradiation effect [13][14][15][16][17], which is more sensitive to paramagnetic defects, such as exchange-coupled ion pairs and unpaired electron in sapphire.…”

Section: Introductionmentioning

confidence: 99%

Electron paramagnetic resonance in gamma-ray, electron and neutron flux irradiated sapphire

Zhang

et al. 2012

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Introductionmentioning

confidence: 99%

Electron paramagnetic resonance in gamma-ray, electron and neutron flux irradiated sapphire

Zhang

et al. 2012

Nuclear Instruments and Methods in Physics Research Section B:

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“…Furthermore, radiation effects of sapphire crystal depend on not only irradiation conditions (irradiation source and fluence, etc.) [14], but also its chemical composition (impurity element content) and preparation process [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Radiation resistance of synthetic sapphire crystal irradiated by low‐energy neutron flux

Wang¹,

Han²,

Zhang³

et al. 2009

Cryst. Res. Technol.

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In this paper, high‐quality sapphire crystal grown by an improved Kyropoulos‐like method, was irradiated by low‐energy neutron (i.e. high proportion of thermal neutron) with various flux (low: 7.5×1015 n/cm2, medium: 7.0×1016 n/cm2 and high: 3.8×1017 n/cm2). The characteristic features of neutron fluence dependence of radiation‐defect formation process, mainly including its change of the structural and optical properties prior to and after irradiation, were investigated by optical absorption (OA), photoluminescence (PL), electron paramagnetic resonance (EPR) and positron annihilation spectroscopy (PAS). It is found that sapphire crystal exhibits high radiation resistance to low‐energy neutron with low fluence. But with the increase of irradiation fluence, it is still sensitive to neutron irradiation mostly in the UV‐visible spectral range, as irradiation‐induced color centers appear, including F‐type and their aggregate centers. Finally, the formation mechanism of the irradiation defects is also discussed. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Electron paramagnetic resonance spectral studies on natural sapphire

Reddy¹,

Reddy²,

Reddy

et al. 2009

Molecular Physics

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Radiation and spectral characteristics of sapphire crystals produced by various methods

Cited by 3 publications

References 5 publications

Electron paramagnetic resonance in gamma-ray, electron and neutron flux irradiated sapphire

Electron paramagnetic resonance in gamma-ray, electron and neutron flux irradiated sapphire

Radiation resistance of synthetic sapphire crystal irradiated by low‐energy neutron flux

Electron paramagnetic resonance spectral studies on natural sapphire

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