Nature and Formation Mechanism of γ-Induced Color Centers with Optical Absorption Band 665 nm in KS-4V and KI Quartz Glasses

Journal Article · Sun Oct 15 04:00:00 EDT 2017 · Atomic Energy (New York)

DOI:https://doi.org/10.1007/S10512-017-0287-Z· OSTI ID:22810326

Islamov, A. Kh.; Ibragimova, E. M.; Faizullaev, B. S.; Khaiitboev, I. A.; Khaiitov, I. A. ^[1]

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1. Institute of Nuclear Physics, Academy of Sciences of the Republic of Uzbekistan (Uzbekistan)

The aim of the experiment was to elucidate the formation mechanism of color centers with optical absorption band in the region 660–680 nm, which are induced in KS-4V and KI quartz glasses under irradiation by {sup 60}Co γ-rays at dose rate 2.5 Gy/sec and temperature 77, 273, and 310 K in the dose range 30–10{sup 5} Gy. The 665 nm band is induced efficiently in KI samples, which contain more metallic impurities (<10 ppm). It is shown that the 665 nm band induced in KS-4V after soaking at 300 K for 40 min diminishes by approximately 30% and almost vanishes after 3 h; it is thermally stable at <300 K and is completely annealed at ≥323 K. The accumulation kinetics of color centers of the 665 nm band in KS-4V at >4·10{sup 2} Gy is caused by rupture of the M{sup +}O–Si≡ bond near aluminum ≡Al{sup 3+}. In contrast to KS-4 and KI glasses, KU-1 glass is recommended for small windows in the ITR reactor for the visible part of the spectrum.

• OSTI ID: 22810326
• Journal Information: Atomic Energy (New York), Journal Name: Atomic Energy (New York) Journal Issue: 6 Vol. 122; ISSN 1063-4258
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ABSORPTION
ALUMINIUM
ANNEALING
COBALT 60
COLOR CENTERS
DOSE RATES
IMPURITIES
IRRADIATION
RADIATION DOSES
ZERO POWER REACTORS