低气压下飞秒激光诱导铜等离子体诊断以及能级布居时间演化

【作者】 李菲菲； 满宝元； 刘栋； 杨诚； 孙艳娜； 陈传松；

【Author】 C.S.Chen;

【机构】 山东师范大学,物理与电子科学学院；

【摘要】 文章研究了在10Pa背景气压飞秒激光诱导铜等离子体的时空演化。不同时刻的等离子体膨胀速度也由时间飞行谱(TOF)得到。本文计算了电子密度和电子温度,并分析了它们随时间的变化趋势。此外,文章还通过521nm谱线与510nm谱线的强度之比,讨论了2D5/2(3d104d)和2P3/2(3d104p)这两个激发态的粒子布居数的时间演化。更多还原

【Abstract】 Temporal and spatial evolution of emission spectra arising from a femtosecond laser-induced copper plasma were investigated under the background pressure of 10 Pa. The expansion velocities of the plasma at different moments were derived from the time of flight（TOF） curves. The electron density and temperature were determined and their variations with time delay were also analyzed. Furthermore, the temporal evolution of relative population for the two excited states ²D_5/2(3d¹⁰4d) and ²P_3/2(3d¹⁰4p) were discussed in terms of the intensity ratio of lines 521 nm and 510 nm.更多还原