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Theoretical study of angle resolved photoelectron emission it the region of autoionizing resonances of single-ionized krypton in sequential two-photon double ionizationтезисы доклада
- Авторы: Grum‐Grzhimaylo A.N., Gryzlova E.V., Kiselev M.D., Popova M.M., Burkov S.M.
- Сборник: Report of Abstracts Science@FELs 2020
- Тезисы
- Год издания: 2020
- Первая страница: 52
- Аннотация: Angle-resolved photoelectron spectroscopy is a powerful tool for investigations of the electronicstructure of condensed and dilute species and of the mechanisms governing thefundamental process of photoionization. Although photoelectron spectroscopy of autoionizingresonances in neutral atomic targets is a well-established research field, the correspondinginvestigations of positive ions only began to attract substantial interest, and actually becamepossible, with the recent advent of intense free-electron lasers (FELs) operating in theextreme ultraviolet (XUV) range [1]. Irradiation of the gaseous target by the high brilliancefemtosecond XUV pulse from FELs produces a high density of free singly charged ions. Theions are subsequently ionized by a second photon from the same pulse. The mechanismof sequential two-photon double ionization (2PDI) was a target of many investigations oftheorists and experimentalists in the last decade [2, 3]. Until recently, PADs in the 2PDIprocess were treated mainly assuming with very few exceptions [4,5] a at continuum of statesfor the positive ions. Here we present photoelectron spectra and angular distributions in theregion of lowest particle-hole autoionizing states 4s4p55p of the krypton ion and investigatetheir behavior at different photon frequencies and fluence. The research is supported by theRussian Foundation for Basic Research (RFBR) under the Project No. 20-52-12023.[1] V. Ayvazyan et al., Eur. Phys. J. D, 37, 297 (2006). [2] M. Braune et al., J. Mod. Opt.63, 324 (2016). [3] A. N. Grum-Grzhimailo, E. V. Gryzlova, S. Fritzsche, N. M. Kabachnik,J. Mod. Opt. 63, 334 (2016). [4] S. Augustin et al., Phys. Rev. A 98, 033408 (2018). [5] P.A. Carpeggiani et al., Nature Physics 15, 170 (2019).
- Добавил в систему: Грызлова Елена Владимировна