Radiation resistance property of barium gallo-germanate glass doped by Nb<sub>2</sub>O<sub>5</sub>

Liu, Guirong; Chen, Xiao; Liu, Honggang; Wang, Yan; Sun, Min; Yan, Na; Qian, Qi; Yang, Zhongmin

doi:10.1088/1674-1056/ac2b1a

Cited by 1 publication

(2 citation statements)

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“…After years of research, it has been discovered that some polyvalent metal ions, containing niobium (Nb) and antimony (Sb), can strengthen the radiation resistance of germanate glass fibers. 22,23 The possible mechanism of anti-radiation in the germanate glass fibers is speculated as follows: Those polyvalent metal ions can absorb charges generated from high-energy ray-induced ionization through valence state conversion, so as to inhibit the formation of radiation-induced color center defects and improve the radiation resistance of glass fibers. However, because of the difficulty in proving the valent change of polyvalent metal ions in germanate glasses, the anti-radiation mechanism still remains in the nature of conjecture.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, not all polyvalent metal ion dopants would reduce anti‐radiation performance of glass fiber. After years of research, it has been discovered that some polyvalent metal ions, containing niobium (Nb) and antimony (Sb), can strengthen the radiation resistance of germanate glass fibers 22,23 . The possible mechanism of anti‐radiation in the germanate glass fibers is speculated as follows: Those polyvalent metal ions can absorb charges generated from high‐energy ray‐induced ionization through valence state conversion, so as to inhibit the formation of radiation‐induced color center defects and improve the radiation resistance of glass fibers.…”

Section: Introductionmentioning

confidence: 99%

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Heat treatment to regulate bismuth valence toward enhanced radiation resistance in barium gallo‐germanate glass

et al. 2022

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Due to the excellent infrared transparency, low phonon energy, and high rare‐earth solubility, germanate laser glass has attracted much attention in mid‐infrared fiber lasers for potential coherent laser radar systems, optical detection, remote sensing, and laser surgery. However, radiation‐induce darkening often occurs in fiber lasers that operate in radiation environment. Here, we report a useful strategy to improve the radiation resistance by adding multivalence Bi ions and discuss its radiation resistance mechanism. In order to study the effect of valence states on the radiation resistance of barium gallo‐germanate glass, we adjust the valence states of Bi ions by heat treatment, the potential mechanism of which is discussed in detail based on the absorption, photoluminescence (PL), and Raman spectra. The absorption, electron paramagnetic resonance, and photoluminescence spectra have proved the interconversion of Bi ions between low and high valence, which inhibits the formation of Ge‐related electron center (GEC) and non‐bridging oxygen hole center defects in the irradiation process. In addition, the Bi3+ content increased by heat treatment is beneficial to serve as electron‐trapping centers in γ‐ray irradiation, thus further reducing the formation of GEC. This study provides a simple method to achieve Bi valence regulation, so as to improve the radiation resistance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%