Electron Correlations in Sequential Two-Photon Double Ionization of an Ar Atom

Electron Correlations in Sequential Two-Photon Double Ionization of an Ar Atom

Bibliografiska uppgifter
Parent link:Atoms
Vol. 10, iss. 4.— 2022.— [139, 12 p.]
Institutionell upphovsman: Национальный исследовательский Томский политехнический университет Школа базовой инженерной подготовки Отделение математики и информатики
Övriga upphovsmän: Lagutin B. M. Boris Mikhaylovich, Petrov I. D. Ivan Dmitrievich, Sukhorukov V. L. Viktor Lvovich, Kilin V. A. Viktor Andreevich, Novikovsky N. M. Nikolay Mikhaylovich, Demekhin F. V. Filipp Vladimirovich, Ehresmann A. Arno
Sammanfattning:Title screen
Sequential two-photon ionization is a process that is experimentally accessible due to the use of new free-electron laser sources for excitation. For the prototypical rare Ar gas atoms, a photoelectron spectrum (PES) corresponding to the second step of the sequential two-photon double ionization (2PDIII) at a photon excitation energy of 65.3 eV was studied theoretically with a focus on the consequences of electron correlations in the considered process. The calculation predicts many intense lines at low photoelectron energies, which cannot be explained on the basis of a one-electron approximation. The processes that lead to the appearance of these lines include many-electron correlations, either in the first or second step of photoionization. A significant fraction of the intensity of the low-energy part of PES is associated with the Auger decay of the excited states formed at the second step of 2PDI. The shape of the low-energy part of the 2PDIII PES is expected to be dependent on both the energy of photon excitations and the flux of the exciting beam.
Publicerad: 2022
Ämnen:
электронный ресурс
труды учёных ТПУ
sequential photoionization
double ionization
photoelectron spectra
argon
many-electron correlations
free-electron laser
фотоионизация
фотоэлектронные спектры
аргон
Länkar:https://doi.org/10.3390/atoms10040139
Materialtyp: Elektronisk Bokavsnitt
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=669369

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