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High-order above-threshold dissociation of molecules

Electrons bound to atoms or molecules can simultaneously absorb multiple photons via the above-threshold ionization featured with discrete peaks in the photoelectron spectrum on account of the quantized nature of the light energy. Analogously, the above-threshold dissociation of molecules has been p...

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Autores principales: Lu, Peifen, Wang, Junping, Li, Hui, Lin, Kang, Gong, Xiaochun, Song, Qiying, Ji, Qinying, Zhang, Wenbin, Ma, Junyang, Li, Hanxiao, Zeng, Heping, He, Feng, Wu, Jian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Academy of Sciences 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5834714/
https://www.ncbi.nlm.nih.gov/pubmed/29440495
http://dx.doi.org/10.1073/pnas.1719481115
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author Lu, Peifen
Wang, Junping
Li, Hui
Lin, Kang
Gong, Xiaochun
Song, Qiying
Ji, Qinying
Zhang, Wenbin
Ma, Junyang
Li, Hanxiao
Zeng, Heping
He, Feng
Wu, Jian
author_facet Lu, Peifen
Wang, Junping
Li, Hui
Lin, Kang
Gong, Xiaochun
Song, Qiying
Ji, Qinying
Zhang, Wenbin
Ma, Junyang
Li, Hanxiao
Zeng, Heping
He, Feng
Wu, Jian
author_sort Lu, Peifen
collection PubMed
description Electrons bound to atoms or molecules can simultaneously absorb multiple photons via the above-threshold ionization featured with discrete peaks in the photoelectron spectrum on account of the quantized nature of the light energy. Analogously, the above-threshold dissociation of molecules has been proposed to address the multiple-photon energy deposition in the nuclei of molecules. In this case, nuclear energy spectra consisting of photon-energy spaced peaks exceeding the binding energy of the molecular bond are predicted. Although the observation of such phenomena is difficult, this scenario is nevertheless logical and is based on the fundamental laws. Here, we report conclusive experimental observation of high-order above-threshold dissociation of H(2) in strong laser fields where the tunneling-ionized electron transfers the absorbed multiphoton energy, which is above the ionization threshold to the nuclei via the field-driven inelastic rescattering. Our results provide an unambiguous evidence that the electron and nuclei of a molecule as a whole absorb multiple photons, and thus above-threshold ionization and above-threshold dissociation must appear simultaneously, which is the cornerstone of the nowadays strong-field molecular physics.
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spelling pubmed-58347142018-03-06 High-order above-threshold dissociation of molecules Lu, Peifen Wang, Junping Li, Hui Lin, Kang Gong, Xiaochun Song, Qiying Ji, Qinying Zhang, Wenbin Ma, Junyang Li, Hanxiao Zeng, Heping He, Feng Wu, Jian Proc Natl Acad Sci U S A Physical Sciences Electrons bound to atoms or molecules can simultaneously absorb multiple photons via the above-threshold ionization featured with discrete peaks in the photoelectron spectrum on account of the quantized nature of the light energy. Analogously, the above-threshold dissociation of molecules has been proposed to address the multiple-photon energy deposition in the nuclei of molecules. In this case, nuclear energy spectra consisting of photon-energy spaced peaks exceeding the binding energy of the molecular bond are predicted. Although the observation of such phenomena is difficult, this scenario is nevertheless logical and is based on the fundamental laws. Here, we report conclusive experimental observation of high-order above-threshold dissociation of H(2) in strong laser fields where the tunneling-ionized electron transfers the absorbed multiphoton energy, which is above the ionization threshold to the nuclei via the field-driven inelastic rescattering. Our results provide an unambiguous evidence that the electron and nuclei of a molecule as a whole absorb multiple photons, and thus above-threshold ionization and above-threshold dissociation must appear simultaneously, which is the cornerstone of the nowadays strong-field molecular physics. National Academy of Sciences 2018-02-27 2018-02-13 /pmc/articles/PMC5834714/ /pubmed/29440495 http://dx.doi.org/10.1073/pnas.1719481115 Text en Copyright © 2018 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/ This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) .
spellingShingle Physical Sciences
Lu, Peifen
Wang, Junping
Li, Hui
Lin, Kang
Gong, Xiaochun
Song, Qiying
Ji, Qinying
Zhang, Wenbin
Ma, Junyang
Li, Hanxiao
Zeng, Heping
He, Feng
Wu, Jian
High-order above-threshold dissociation of molecules
title High-order above-threshold dissociation of molecules
title_full High-order above-threshold dissociation of molecules
title_fullStr High-order above-threshold dissociation of molecules
title_full_unstemmed High-order above-threshold dissociation of molecules
title_short High-order above-threshold dissociation of molecules
title_sort high-order above-threshold dissociation of molecules
topic Physical Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5834714/
https://www.ncbi.nlm.nih.gov/pubmed/29440495
http://dx.doi.org/10.1073/pnas.1719481115
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