由CH4/Ar放电产生C2负离子,在超声射流条件下,观测到B←X(1-0)跃迁的激光诱导荧光激发谱.对该谱带的转动结构进行了标识,并得到X(v=0)和B(v=1)态的转动常数.另外测量了B(v=1)振动态的寿命,其寿命为80±1 ns.
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