Triple Photoionization of Lithium

Wehlitz, R.; Huang, Ming-Tie; DePaola, B. D.; Levin, J. C.; Sellin, I. A.; Nagata, Tetsuo; Cooper, J.; Azuma, Y.

doi:10.1103/physrevlett.81.1813

Cited by 86 publications

(91 citation statements)

References 25 publications

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“…While the total triple ionization cross section has already been measured [3] and compares favorably with our results, the electronic angular correlation probability is not known experimentally. However, it should be measurable with state of the art experimental techniques.…”

Section: Introductionsupporting

confidence: 71%

“…where R 3+ and R 2+ are the experimental triple-to-single and double-to-single photoionization ratios, respectively [3,4,13]. Figure 1b also illustrates the numerical effort involved in computing P 3+ .…”

Section: Triple Photoionization Cross Sectionmentioning

confidence: 99%

“…Experimentally, the first data on triple ionization appeared only recently [3,4], compared to data on photo double ionization which date back to the late sixties of the last century [5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Coulomb four-body problem in a classical framework: triple photoionization of lithium

Emmanouilidou¹,

Rost²

2006

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

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Abstract. Formulating a quasiclassical approach we determine the cross section for the complete four-body break-up of the lithium ground state following single photon absorption from threshold up to 220 eV excess energy. In addition, we develop a new classification scheme for three-electron ionizing trajectories in terms of electron-electron collisions, thereby identifying two main ionization paths which the three electrons in the ground state of lithium follow to escape to the continuum. The dominant escape paths manifest themselves in a characteristic "T-shape" break-up pattern of the three electrons which implies observable structures in the electronic angular correlation probability. This break-up pattern prevails for excess energies so low that the Wannier threshold law σ ∝ E α describes already the triple ionization cross section, whose predicted value α = 2.16 we can confirm quantitatively.

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Section: Introductionsupporting

confidence: 71%

Section: Triple Photoionization Cross Sectionmentioning

confidence: 99%

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The Coulomb four-body problem in a classical framework: triple photoionization of lithium

Emmanouilidou¹,

Rost²

2006

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

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show abstract

“…Another direction of present experimental and theoretical investigations is focused on the double and even triple photoionization of three-electron targets in the ground state [14,15,16,17,18,19,20,21,22]. At present, the lightest targets, namely, the lithium atom or the Be + ion, are used only.…”

mentioning

confidence: 99%

“…(5), (12), and (13). The expression (14) involves summation over the electron polarizations in the final state and averaging over those of the initial state. The factor 2 accounts for the existence of two K-shell electrons; each of them can be coupled with the L-shell electron.…”

mentioning

confidence: 99%

Nonrelativistic double photoeffect on lithium-like ions at high energies

Михайлов

Nefiodov

et al. 2006

Physics Letters A

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The total cross section for double ionization of lithiumlike ions by a high-energy photon is calculated in leading order of the nonrelativistic perturbation theory. The partial contributions due to simultaneous and sequential emissions of two electrons are taken into account. The cross section under consideration is shown to be related to those for double photoeffect on the ground and excited 2 1,3 S states of heliumlike ions. The double-to-single ionization ratio is equal to R = 0.288/Z 2 for lithiumlike ions with moderate nuclear charge numbers Z. However, even for the lightest three-electron targets such as Li and Be + , analytical predictions are found to be in good agreement with the numerical calculations performed within the framework of different rather involved approaches.

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The Approach to Asymptotic Behavior in Photoionization

Pratt

Surić

2001

J Chinese Chemical Soc

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The high energy behavior of many atomic processes can be understood in terms of the theory of asymptotic Fourier transforms (AFT). In high energy atomic processes initial or final state wave functions will include continuum states of asymptotic plane wave character, and these will often result in a matrix element which can be viewed as a (multi‐dimensional) Fourier transform. The result will be a behavior of matrix elements and cross sections as inverse powers of the asymptotic momenta, associated with singular behaviors of atomic wave functions, which in turn are associated with the singular (Coulomb) behavior of the interaction of the atomic constituents. The situation is complicated by the Coulomb functions which modify these plane wave behaviors; these result in slowly convergent factors (we call them Stobbe factors) which may be explicitly factored out, yielding a matrix element as a product of a Stobbe factor and a residual matrix element which converges rapidly to its asymptotic form. We will illustrate these ideas here in a discussion of single and double non‐relativistic photoionization, though the approach may also be applied to electron scattering (and with excitation or ionization) and in the relativistic case. The main ideas of the approach can already be illustrated in the discussion of ionization of a particle in a central potential. Within this approach we explain both (for single ionization) the persistent high energy deviations from independent particle approximation predictions and (for double ionization) the shake–off and quasi–free contributions. We also discuss the importance of final state interactions and retardation corrections.

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Triple Photoionization of Lithium

Cited by 86 publications

References 25 publications

The Coulomb four-body problem in a classical framework: triple photoionization of lithium

The Coulomb four-body problem in a classical framework: triple photoionization of lithium

Nonrelativistic double photoeffect on lithium-like ions at high energies

The Approach to Asymptotic Behavior in Photoionization

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