Calculated and measured angular correlation between photoelectrons and Auger electrons from K-shell ionization

Robicheaux, F.; Jones, Michael Peyton; Schöffler, M. S.; Jahnke, T.; Kreidi, K.; Titze, J.; Stuck, C.; Dörner, R.; Belkacem, A.; Weber, Thorsten; Landers, A. L.

doi:10.1088/0953-4075/45/17/175001

Cited by 7 publications

(24 citation statements)

References 22 publications

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“…For the quantum-mechanical method [17,19,20] used in this paper, we use Eq. (1), a time-independent inhomogeneous equation, to describe the propagation of the photoelectron; the process after the Auger decay is described by a time-dependent Schrödinger equation with a source term for the two ionized electrons [Eq.…”

Section: A Quantum-mechanical Methodsmentioning

confidence: 99%

“…We use S(t) = 1/{1 + exp[10(1 − 5t/t f )]}, where t f is the final time of the calculation [17]. There are three parts in H : the Hamiltonian for the photoelectron, the Auger electron, and the interaction between the two ionized electrons.…”

Section: A Quantum-mechanical Methodsmentioning

confidence: 99%

“…The physical process of photoabsorption followed by sequential double ionization has been studied extensively in the past decades [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The first electron emitted from the nucleus is called the photoelectron because its ionization is due to photoabsorption.…”

Section: Introductionmentioning

confidence: 99%

“…During the past decades, this problem has been investigated within different atomic systems, namely, 4d 3/2,5/2 photoionization following N -OO Auger decay in Xe [1][2][3][4][5][6][7], Ar 3d photoionization followed by Auger decay [12,13], 1s or 2s photoionization with subsequent Auger decay in Ne [8][9][10][11]17], and 3d 5/2,3/2 photoionization followed by Auger decay in Kr [15,16]. These papers covered a wide energy range.…”

Section: Introductionmentioning

confidence: 99%

“…To achieve this goal, we perform calculations with a numerical method [17,19,20] and refer to this as the timedependent Schrödinger equation (TDSE) method in which all Coulomb interactions between each pair of particles are fully taken into account. To confirm the validity of the results, we also redo the calculations with a classical-trajectory Monte Carlo (CTMC) method.…”

Section: Introductionmentioning

confidence: 99%

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Low-energy photoelectron dynamics in Kr3d5/2photoionization followed by Auger decay

Wang

Loch

2015

Phys. Rev. A

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The effects induced during the process of inner-shell photoionization followed by Auger decay are investigated for the photoionization of Kr 3d 5/2 in an extremely low photoelectron energy regime. Both the photoelectron energy and relative angular distributions are calculated with a recently developed quantum-mechanical method where all the Coulomb interactions between each pair of particles are fully considered. The photoelectron energy distribution is asymmetric with respect to the initial photoelectron energy, and its peak shifts to a lower energy. As the absorbed photon energy is reduced, the peak of the photoelectron energy distribution moves to the negative energy range. As a manifestation of these dynamics, peak structures are observed in the relative angular distribution. We also simulate the process with a classical-trajectory Monte Carlo method, obtaining similar results to the quantum-mechanical ones.

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Section: A Quantum-mechanical Methodsmentioning

confidence: 99%

Section: A Quantum-mechanical Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low-energy photoelectron dynamics in Kr3d5/2photoionization followed by Auger decay

Wang

Loch

2015

Phys. Rev. A

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Comparison of different quantum mechanical methods for inner atomic shell photo-ionization followed by Auger decay

Wang¹,

Sheinerman²,

Robicheaux³

2014

J. Phys. B: At. Mol. Opt. Phys.

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A numerical time-dependent quantum mechanical approach was developed previously for simulating the process of photoionization followed by Auger decay for cases where the photoelectron energy is not very large; the method accurately calculates the interaction between the two active electrons, but simplifies their interaction with the core electrons. More established theoretical methods, which take account of postcollision interaction effects, allow an accurate description of this process when the photoelectron energy is not too low. We demonstrate that using the time-dependent method (although with some simplifications that are needed for its numerical implementation) for low energy photoelectrons and more established methods for higher energy allows accurate calculations for nearly all possible combinations of electron energy. This is confirmed by performing calculations of the photoelectron energy and angular distributions for the 1 s photoionization of Ne, with a subsequent KLL Auger transition. By computing the energy and angular distributions for energies where the two groups of methods should agree and where they should disagree, we demonstrate their consistency and range of accuracy. For the regions where the methods disagree, we discuss the reasons for any discrepancies and the trends in the differences. In addition, some of our calculations are compared with existing experimental data for the same system. The agreement found in the comparison confirms the reliability of the theoretical approaches.

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Energy dependence of angular momentum transfer in post-collision interaction. Classical view

Gerchikov

Sheinerman

2018

J. Phys. B: At. Mol. Opt. Phys.

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A classical approach to the description of angular momentum transfer between the Auger electron and photoelectron in post-collision interaction is worked out. The results of the classical approach coincide with the quantum mechanical ones at the photoionization threshold. Besides, the approach developed provides a description of angular momentum transfer beyond the photoionization threshold. In particular, it is suitable in the energy region of comparable velocities of two emitted electrons.

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Calculated and measured angular correlation between photoelectrons and Auger electrons from K-shell ionization

Cited by 7 publications

References 22 publications

Low-energy photoelectron dynamics in Kr3d5/2photoionization followed by Auger decay

Low-energy photoelectron dynamics in Kr3d5/2photoionization followed by Auger decay

Comparison of different quantum mechanical methods for inner atomic shell photo-ionization followed by Auger decay

Energy dependence of angular momentum transfer in post-collision interaction. Classical view

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