Time-resolved photoelectron imaging of complex resonances in molecular nitrogen
| Autor: | Per Johnsson, Jasper Peschel, Kevin C. Prince, Stephen T. Pratt, N. G. Harshitha, Primož Rebernik Ribič, Yu Luo, Michele Di Fraia, Paolo Carpeggiani, Dominik Ertel, Carlo Callegari, Matteo Moioli, Emma Rose Simpson, Hikaru Fujise, Kiyoshi Ueda, Shu Saito, Johan Mauritsson, Praveen Kumar Maroju, Heide Ibrahim, Giuseppe Sansone, Oksana Plekan, Miltcho B. Danailov, Anna Olofsson, François Légaré, Sergei Kühn, Alexander Demidovich, Daehyun You, Tamás Csizmadia, Ronak Shah, Mizuho Fushitani, Mathieu Dumergue, Giovanni De Ninno, Akiyoshi Hishikawa, Lorenzo Raimondi, Marco Zangrando, Luca Giannessi |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
010304 chemical physics Absorption spectroscopy General Physics and Astronomy Ionic bonding 010402 general chemistry Laser 01 natural sciences Spectral line 0104 chemical sciences law.invention law Ionization 0103 physical sciences Physics::Atomic and Molecular Clusters Physical and Theoretical Chemistry Atomic physics Exponential decay Quantum Fermi Gamma-ray Space Telescope |
| Zdroj: | The Journal of chemical physics. 154(14) |
| ISSN: | 1089-7690 |
| Popis: | We have used the FERMI free-electron laser to perform time-resolved photoelectron imaging experiments on a complex group of resonances near 15.38 eV in the absorption spectrum of molecular nitrogen, N2, under jet-cooled conditions. The new data complement and extend the earlier work of Fushitani et al. [Opt. Express 27, 19702–19711 (2019)], who recorded time-resolved photoelectron spectra for this same group of resonances. Time-dependent oscillations are observed in both the photoelectron yields and the photoelectron angular distributions, providing insight into the interactions among the resonant intermediate states. In addition, for most states, we observe an exponential decay of the photoelectron yield that depends on the ionic final state. This observation can be rationalized by the different lifetimes for the intermediate states contributing to a particular ionization channel. Although there are nine resonances within the group, we show that by detecting individual photoelectron final states and their angular dependence, we can identify and differentiate quantum pathways within this complex system. |
| Databáze: | OpenAIRE |
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