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首页> 外文期刊>Nuclear Instruments & Methods in Physics Research. B, Beam Interactions with Materials and Atoms >Effect of annealing in thermostimulated luminescence (TSL) on natural blue colour calcite crystals
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Effect of annealing in thermostimulated luminescence (TSL) on natural blue colour calcite crystals

机译：热刺激发光（TSL）中的退火对天然蓝色方解石晶体的影响

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摘要

The thermostimulated luminescence (TSL) glow curve characteristics of 10 blue coloured calcite crystals of Southern Tamilnadu are analysed. The natural thermoluminescence (NTL) measurements were carried out for all the samples and annealed in air at the temperatures ranging from 200 to 700℃, at an interval of 50℃, for 1 h duration. The glow curves of annealed and unannealed samples irradiated with a gamma dose of 500 Gy show three peaks at 145, 255 and 345℃, respectively, when recorded with a linear heating rate of 10℃/s. Annealing treatment above 400℃ increases the sensitivity of all TSL peaks except 345℃. On the other hand, annealing at 700℃ caused a collapse in the TSL sensitivity. The enhancement in TSL sensitivity was found to depend on the annealing temperature and time. Annealing treatment at 600℃ for 5 h followed by quenching in air is the optimum conditions for TSL sensitization. The response to gamma irradiation is linear in the range from 1 to 10~4 Gy. The emission spectra of all the samples show an emission at around 610 nm but with different intensities for each sample. With reference to earlier work, it may be assumed that the recombination site always involves Mn~(2+) ions.
机译：分析了南部泰米尔纳德邦的10种蓝色方解石晶体的热刺激发光（TSL）辉光曲线特征。对所有样品进行自然热致发光（NTL）测量，并在空气中于200至700℃的温度下以50℃的间隔退火1小时。当以10℃/ s的线性加热速率记录时，用500 Gyγ辐照的退火和未退火样品的辉光曲线分别在145、255和345℃出现三个峰。 400℃以上的退火处理可提高除345℃以外的所有TSL峰的灵敏度。另一方面，在700℃退火导致TSL灵敏度下降。发现TSL灵敏度的提高取决于退火温度和时间。 TSL敏化的最佳条件是在600℃退火5h，然后在空气中淬火。在1到10〜4 Gy范围内，对伽玛射线的响应是线性的。所有样品的发射光谱显示在610 nm附近发射，但每个样品的发射强度不同。参考先前的工作，可以假定重组位点总是包含Mn〜（2+）离子。

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