Electron-Nuclear Coupling through Autoionizing States after Strong-Field Excitation of H2 Molecules

被引：15

作者：

Mi, Yonghao ^{[1
]}

Camus, Nicolas ^{[1
]}

Fechner, Lutz ^{[1
]}

Laux, Martin ^{[1
]}

Moshammer, Robert ^{[1
]}

Pfeifer, Thomas ^{[1
]}

机构：

[1] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 18期

关键词：

ABOVE-THRESHOLD IONIZATION; SUBPICOSECOND LASER-PULSES; H2; MOLECULE; PHOTOIONIZATION; DISSOCIATION; LOCALIZATION; DEPENDENCE; ENERGIES; DYNAMICS;

D O I：

10.1103/PhysRevLett.118.183201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Channel-selective electron emission from strong-field photoionization of H-2 molecules is experimentally investigated by using ultrashort laser pulses and a reaction microscope. The electron momenta and energy spectra in coincidence with bound and dissociative ionization channels are compared. Surprisingly, we observed an enhancement of the photoelectron yield in the low-energy region for the bound ionization channel. By further investigation of asymmetrical electron emission using two-color laser pulses, this enhancement is understood as the population of the autoionizing states of H-2 molecules in which vibrational energy is transferred to electronic energy. This general mechanism provides access to the vibrational-state distribution of molecular ions produced in a strong-field interaction.

引用

页数：5

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