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首页> 外文期刊>Physica, B. Condensed Matter >Effects of neutron irradiation and subsequent annealing on the optical characteristics of sapphire
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Effects of neutron irradiation and subsequent annealing on the optical characteristics of sapphire

机译：中子辐照及后续退火对蓝宝石光学特性的影响

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摘要

In this paper, the effect of neutron irradiation on sapphire single crystal with fast neutron of 1.0×10~(18) and 1.0×10~(19) neutrons/cm~2 has been investigated along with the effect of annealing temperature. It is found that the colorless transparent sapphire single crystals were turned yellow after 10 MeV fast neutron irradiation at room temperature. There are peaks at 206, 230, 258, 305, 358 and 452 nm after neutron irradiation. And the intensity of optical absorption bands decrease with wavelength and annealing temperature. A new absorption peak at 452 nm was found after isothermal annealing at 400 °C for 10 min, which was ascribed to F2 color center. Because of the recombination of interstitial ions and vacancies, color centers were almost removed after annealing at 1000 °C. The TL peaks were found to shift to higher temperature after neutron irradiation. And a higher fluence of the neutron irradiation would result in deep traps revealed as the new TL peaks at 176 and 227 °C.
机译：本文研究了中子辐照对快中子1.0×10〜（18）和1.0×10〜（19）中子/ cm〜2的蓝宝石单晶的影响以及退火温度的影响。发现在室温下10 MeV快速中子辐照后，无色透明的蓝宝石单晶变成黄色。中子辐照后在206、230、258、305、358和452 nm处出现峰。并且光吸收带的强度随着波长和退火温度而降低。在400°C等温退火10分钟后，在452 nm处发现一个新的吸收峰，该峰归因于F2色心。由于间隙离子和空位的重组，在1000°C退火后几乎消除了色心。发现中子辐照后，TL峰移至较高温度。中子辐照度的更高通量将导致深陷阱，因为在176和227°C处出现了新的TL峰。

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