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Time-resolved observation of interatomic excitation-energy transfer in argon dimers

MPS-Authors
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Mizuno,  Tomoya
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Cörlin,  Philipp
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Pfeifer,  Thomas
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Fischer,  Andreas
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Moshammer,  Robert
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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Citation

Mizuno, T., Cörlin, P., Miteva, T., Gokhberg, K., Kuleff, A., Cederbaum, L. S., et al. (2017). Time-resolved observation of interatomic excitation-energy transfer in argon dimers. The Journal of Chemical Physics, 146(10): 104305. doi:10.1063/1.4978233.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002C-E0AD-E
Abstract
The ultrafast transfer of excitation energy from one atom to its neighbor is observed in singly charged argon dimers in a time-resolved extreme ultraviolet (XUV)-pump IR-probe experiment. In the pump step, bound 3s-hole states in the dimer are populated by single XUV-photon ionization. The excitation-energy transfer at avoided crossings of the potential-energy curves leads to dissociation of the dimer, which is experimentally observed by further ionization with a time-delayed IR-probe pulse. From the measured pump-probe delay-dependent kinetic-energy release of coincident Ar+ + Ar+ ions, we conclude that the transfer of energy occurs on a time scale of about 800fs . This mechanism represents a fast relaxation process below the energy threshold for interatomic Coulombic decay.