OBSERVATION OF NONSEQUENTIAL DOUBLE IONIZATION OF HELIUM WITH OPTICAL TUNNELING
OBSERVATION OF NONSEQUENTIAL DOUBLE IONIZATION OF HELIUM WITH OPTICAL TUNNELING
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DOI：
10.1103/physrevlett.69.2642
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发表时间：
1992-11-02
影响因子：
8.6
通讯作者：
KULANDER, KC
中科院分区：
文献类型：
--
作者：
FITTINGHOFF, DN;BOLTON, PR;KULANDER, KC
我们测量了120fs， 614 nm激光脉冲电离氦的离子产量，激光脉冲强度接近10(16)W/cm2。我们发现，对于这些超短脉冲，He+2数据表现出与He+信号并行饱和的特征，表明电离可能是非顺序进行的。我们提出了一种新的机制，这种机制只能存在于隧道状态中，用于这种非顺序电离。
We have measured the ion yields for helium ionized by 120 fs, 614 nm laser pulses for intensities near 10(16) W/cm2. We have found that for these ultrashort pulses the He+2 data exhibit a feature which saturates in parallel with the He+ signal indicating that the ionization may proceed nonsequentially. We propose a new mechanism, which can exist only in the tunneling regime, for such nonsequential ionization.