Bhardwaj V R, Aseyev S A, Mehendale M, Yudin G L, Villeneuve D M, Rayner D M, Ivanov M Y, Corkum P B
National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6.
Phys Rev Lett. 2001 Apr 16;86(16):3522-5. doi: 10.1103/PhysRevLett.86.3522.
In intense field ionization, an electron removed from the atomic core oscillates in the combined fields of the laser and the parent ion. This oscillation forces repeated revivals of its spatial correlation with the bound electrons. The total probability of double ionization depends on the number of returns and therefore on the number of optical periods in the laser pulse. We observed the yield of Ne(2+) relative to Ne(+) with 12 fs pulses to be clearly less compared to 50 fs pulses in qualitative agreement with our theoretical model.
在强场电离过程中，从原子核移除的电子在激光和母离子的组合场中振荡。这种振荡迫使它与束缚电子的空间相关性反复恢复。双电离的总概率取决于返回次数，因此取决于激光脉冲中的光学周期数。我们观察到，与50飞秒脉冲相比，12飞秒脉冲下Ne(2+)相对于Ne(+)的产率明显更低，这与我们的理论模型定性一致。
