Autoionization dynamics of helium nanodroplets resonantly excited by intense XUV laser pulses
The ionization dynamics of helium droplets irradiated by intense, femtosecond extreme ultraviolet (XUV) pulses is investigated in detail by photoelectron spectroscopy. Helium droplets are resonantly excited to atomic-like 2p states with a photon energy of 21.5 eV and autoionize by interatomic Coulom...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2020-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ab9554 |
| _version_ | 1797750161229742080 |
|---|---|
| author | Y Ovcharenko A C LaForge B Langbehn O Plekan R Cucini P Finetti P O’Keeffe D Iablonskyi T Nishiyama K Ueda P Piseri M Di Fraia R Richter M Coreno C Callegari K C Prince F Stienkemeier T Möller M Mudrich |
| author_facet | Y Ovcharenko A C LaForge B Langbehn O Plekan R Cucini P Finetti P O’Keeffe D Iablonskyi T Nishiyama K Ueda P Piseri M Di Fraia R Richter M Coreno C Callegari K C Prince F Stienkemeier T Möller M Mudrich |
| author_sort | Y Ovcharenko |
| collection | DOAJ |
| description | The ionization dynamics of helium droplets irradiated by intense, femtosecond extreme ultraviolet (XUV) pulses is investigated in detail by photoelectron spectroscopy. Helium droplets are resonantly excited to atomic-like 2p states with a photon energy of 21.5 eV and autoionize by interatomic Coulombic decay (ICD). A complex evolution of the electron spectra as a function of droplet size (250 to 10 ^6 He atoms per droplet) and XUV intensity (10 ^9 –10 ^12 W cm ^−2 ) is observed, ranging from narrow atomic-like peaks that are due to binary autoionization, to an unstructured feature characteristic of electron emission from a nanoplasma. The experimental results are analyzed and interpreted with the help of a numerical simulation based on rate equations taking into account all relevant processes—multi-step ionization, electronic relaxation, ICD, secondary inelastic collisions, desorption of electronically excited atoms, and collective autoionization (CAI). |
| first_indexed | 2024-03-12T16:29:40Z |
| format | Article |
| id | doaj.art-ad509fe9086642089686921be94692f3 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:29:40Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-ad509fe9086642089686921be94692f32023-08-08T15:35:20ZengIOP PublishingNew Journal of Physics1367-26302020-01-0122808304310.1088/1367-2630/ab9554Autoionization dynamics of helium nanodroplets resonantly excited by intense XUV laser pulsesY Ovcharenko0https://orcid.org/0000-0001-6804-9781A C LaForge1B Langbehn2https://orcid.org/0000-0002-3245-8169O Plekan3R Cucini4https://orcid.org/0000-0001-8516-1409P Finetti5P O’Keeffe6D Iablonskyi7T Nishiyama8K Ueda9P Piseri10M Di Fraia11R Richter12M Coreno13https://orcid.org/0000-0003-4376-808XC Callegari14https://orcid.org/0000-0001-5491-7752K C Prince15https://orcid.org/0000-0002-5416-7354F Stienkemeier16https://orcid.org/0000-0001-6014-8013T Möller17M Mudrich18https://orcid.org/0000-0003-4959-5220Institut für Optik und Atomare Physik , TU Berlin, 10623 Berlin, Germany; European XFEL GmbH , 22607 Hamburg, GermanyPhysikalisches Institut, Universität Freiburg , 79104 Freiburg, GermanyInstitut für Optik und Atomare Physik , TU Berlin, 10623 Berlin, GermanyElettra-Sincrotrone Trieste , 34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste , 34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste , 34149 Basovizza, Trieste, ItalyISM-CNR , Area della Ricerca di Roma 1, Monterotondo Scalo 00015, ItalyInstitute of Multidisciplinary Research for Advanced Materials, Tohoku University , 980-8577 Sendai, JapanDivision of Physics and Astronomy, Graduate School of Science, Kyoto University , 606-8501 Kyoto, JapanInstitute of Multidisciplinary Research for Advanced Materials, Tohoku University , 980-8577 Sendai, JapanCIMAINA and Dipartimento di Fisica, Università degli Studi di Milano , 20133 Milano, ItalyElettra-Sincrotrone Trieste , 34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste , 34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste , 34149 Basovizza, Trieste, Italy; ISM-CNR , Area della Ricerca di Roma 1, Monterotondo Scalo 00015, ItalyElettra-Sincrotrone Trieste , 34149 Basovizza, Trieste, ItalyElettra-Sincrotrone Trieste , 34149 Basovizza, Trieste, Italy; Centre for Translational Atomaterials, and Department of Chemistry and Biotechnology , Swinburne University of Technology, Melbourne, AustraliaPhysikalisches Institut, Universität Freiburg , 79104 Freiburg, Germany; Freiburg Institute of Advanced Studies (FRIAS), University of Freiburg , 79194 Freiburg, GermanyInstitut für Optik und Atomare Physik , TU Berlin, 10623 Berlin, GermanyDepartment of Physics and Astronomy, Aarhus University , 8000 C Aarhus, DenmarkThe ionization dynamics of helium droplets irradiated by intense, femtosecond extreme ultraviolet (XUV) pulses is investigated in detail by photoelectron spectroscopy. Helium droplets are resonantly excited to atomic-like 2p states with a photon energy of 21.5 eV and autoionize by interatomic Coulombic decay (ICD). A complex evolution of the electron spectra as a function of droplet size (250 to 10 ^6 He atoms per droplet) and XUV intensity (10 ^9 –10 ^12 W cm ^−2 ) is observed, ranging from narrow atomic-like peaks that are due to binary autoionization, to an unstructured feature characteristic of electron emission from a nanoplasma. The experimental results are analyzed and interpreted with the help of a numerical simulation based on rate equations taking into account all relevant processes—multi-step ionization, electronic relaxation, ICD, secondary inelastic collisions, desorption of electronically excited atoms, and collective autoionization (CAI).https://doi.org/10.1088/1367-2630/ab9554He nanodropletsinteratomic Coulombic decaycollective autoionizationnanoplasma |
| spellingShingle | Y Ovcharenko A C LaForge B Langbehn O Plekan R Cucini P Finetti P O’Keeffe D Iablonskyi T Nishiyama K Ueda P Piseri M Di Fraia R Richter M Coreno C Callegari K C Prince F Stienkemeier T Möller M Mudrich Autoionization dynamics of helium nanodroplets resonantly excited by intense XUV laser pulses New Journal of Physics He nanodroplets interatomic Coulombic decay collective autoionization nanoplasma |
| title | Autoionization dynamics of helium nanodroplets resonantly excited by intense XUV laser pulses |
| title_full | Autoionization dynamics of helium nanodroplets resonantly excited by intense XUV laser pulses |
| title_fullStr | Autoionization dynamics of helium nanodroplets resonantly excited by intense XUV laser pulses |
| title_full_unstemmed | Autoionization dynamics of helium nanodroplets resonantly excited by intense XUV laser pulses |
| title_short | Autoionization dynamics of helium nanodroplets resonantly excited by intense XUV laser pulses |
| title_sort | autoionization dynamics of helium nanodroplets resonantly excited by intense xuv laser pulses |
| topic | He nanodroplets interatomic Coulombic decay collective autoionization nanoplasma |
| url | https://doi.org/10.1088/1367-2630/ab9554 |
| work_keys_str_mv | AT yovcharenko autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT aclaforge autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT blangbehn autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT oplekan autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT rcucini autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT pfinetti autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT pokeeffe autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT diablonskyi autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT tnishiyama autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT kueda autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT ppiseri autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT mdifraia autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT rrichter autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT mcoreno autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT ccallegari autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT kcprince autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT fstienkemeier autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT tmoller autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses AT mmudrich autoionizationdynamicsofheliumnanodropletsresonantlyexcitedbyintensexuvlaserpulses |