Al原子共振双线跃迁几率实验研究

我们用Nd：YAG脉冲激光烧蚀金属Al靶产生等离子体，利用时间分辨技术摄取Al等离子体辐射时间分辨谱，获得Al原子共振双线辐射谱；通过积分谱线下的面积，计算共振双线强度；根据共振双线强度比，推断Al原子共振双线跃迁几率比，并与理论计算结果比较。结果发现，实验结果与理论计算符合的很好。

Investigation on the Transition Probability of the Aluminum Resonant Double Lines

In order to obtain the aluminum resonant double lines, Al I 396.15 nm and Al I 394.40 nm, we have recorded the time-resolved spectra of the plasma induced by Nd:YAG laser ablating metal aluminum in Ar, under the Ar ambient pressure 10 kPa, at 0.1 mm in front of the target, with laser pulse energy 145 mJ/pulse. Relative intensities of the double lines were acquired by integrating the area under the double lines, respectively. According to the ratio of the intensities of the double lines, the ratio of transition probability of the double lines was deduced, and contrasted with the theoretical value. As the result, we found they tally with each other exactly. Limited to our experimental condition, we could only estimate approximately the ratio of transition probability of the double lines. Further experiments were needed for precise measurements of respective transition probability of the double lines.