Electron-Nuclear Coupling through Autoionizing States after Strong-Field Excitation of H_{2} Molecules.
Phys Rev Lett
; 118(18): 183201, 2017 May 05.
Article
em En
| MEDLINE
| ID: mdl-28524692
ABSTRACT
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.
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En
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2017
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Article