Influence of the helium autoionization structures on the single/double ionization signal

被引：0

作者：

L.A.A. Nikolopoulos

Takashi Nakajima

P. Lambropoulos

机构：

[1] Institute of Electronic Structure and Laser,

[2] FORTH,undefined

[3] P.O. Box 1527,undefined

[4] Heraklion,undefined

[5] Crete 71110,undefined

[6] Greece,undefined

[7] Institute of Advanced Energy,undefined

[8] Kyoto University,undefined

[9] Gokasho,undefined

[10] Uji,undefined

[11] Kyoto 611-0011,undefined

[12] Japan,undefined

[13] Dept. of Physics,undefined

[14] Univ. of Crete,undefined

[15] P.O. Box 1527,undefined

[16] Heraklion,undefined

[17] Crete 71110,undefined

[18] Greece,undefined

来源：

The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics | 2002年 / 20卷

关键词：

PACS. 32.80.Rm Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states) – 32.80.Dz Autoionization;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Calculations of intense field (around 1016 W/cm2) single- and double-ionization processes in helium at XUV wavelengths are presented. The laser wavelength is chosen near the | 2s2p1P autoionization structure and the dynamics are explored. Single and double ionization yields, as well as the photoelectron energy spectrum for photon energies around the autoionization structure are calculated. In the case of a pulse of few femtoseconds duration, no significant enhancement of the double ionization yield has been found in tuning the photon frequency around the peak of the resonance. It is also shown that in the case of a long pulse (and hence narrow compared with the relevant autoionization width), the branching ratio of double to single ionization yield can be relatively enhanced by tuning to the absorption minimum of the resonance.

引用

页码：297 / 304

页数：7

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