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脉冲激光烧蚀金属平面铝靶产生的热原子与气相CF4碰撞反应中 ,在 40 0— 60 0nm之间观测到激发态C2 分子的发光光谱 ,它们可归属为Swan带的d3Πg-a3Πu 跃迁中Δv=2 ,1,0 ,- 1,- 2五个振动序列 (v’≤ 6) .光谱强度分析表明 ,C2 激发态的振动温度达 63 40K左右 .与激光烧蚀Al+O2 反应生成AlO的实验结果以及激光烧蚀Cu +CF4的光谱比较 ,对比Al( 2 P1 2 - 2 S1 2 ,3 94 4nm)和C2 的d—a跃迁 ( 0— 0 )带带头 ( 5 16 5nm)的飞行时间轮廓 ,认为激发态的Al( 2 S1 2 )原子通过电子态传能可能是C2 激发态d形成的主要原因
Pulsed laser ablation of hot metal atoms produced by the aluminum target collisions with the gas phase CF4, between 40 0-60 Onm observed excited state C2 molecular emission spectra, which can be attributed to the Swan band d3Πg-a3Πu transition Δv = 2, 1, 0, -1, -2 (v’≤6) .Spectral intensity analysis showed that the vibrational temperature of C2 excited state was about 63 40 K. The reaction with laser ablated Al + O2 generated AlO The experimental results and the laser ablation of Cu + CF4 spectra were compared to compare the flight time of Al (2 P1 2 - 2 S1 2, 3 94 4nm) and C2 d-a transition (0 - 0) Contour that the excited state of the Al (2 S1 2) atom through the electronic state transfer may be the main reason for the formation of C2 excited state d