<i>Treasures from the Bodleian Library</i>. A. G. Hassall , W. O. Hassall

Kaplan, Robin

doi:10.1086/arlisnanews.4.3.27945635

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“…and (iii) the main contribution to the scattering comes from the ionization channel. Using the results obtained for monochromatic Compton line spectra [34], one can find that for the 1s initial electron state, with the accuracy which is higher than experimental resolution, the last criterion becomes…”

Section: Attosecond Compton Linesmentioning

confidence: 99%

Unifiedab initiotreatment of attosecond photoionization and Compton scattering

Yudin

Bondar

Patchkovskii

et al. 2009

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

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We present a new theoretical approach to attosecond laserassisted photo-and Compton ionization. Attosecond x-ray absorption and scattering are described byŜ (1,2) -matrices, which are coherent superpositions of "monochromatic"Ŝ (1,2) -matrices in a laser-modified Furry representation. Besides refining the existing theory of the soft x-ray photoelectron attosecond streak camera and spectral phase interferometry (ASC and ASPI), we formulate a theory of hard x-ray photoelectron and Compton ASC and ASPI. The resulting scheme has a simple structure and leads to closed-form expressions for ionization amplitudes. We investigate Compton electron interference in the separable Coulomb-Volkov continuum with both Coulomb and laser fields treated non-perturbatively. We find that at laser-field intensities below 10 13 Wcm −2 normalized Compton lines almost coincide with the lines obtained in the laserfree regime. At higher intensities, attosecond interferences survive integration over electron momenta, and feature prominently in the Compton lines themselves. We define a regime where the electron ground-state density can be measured with controllable accuracy in an attosecond time interval. The new theory provides a firm basis for extracting photo-and Compton electron phases and atomic and molecular wavefunctions from experimental data. ‡ Unless stated otherwise, the Hartree atomic units (a.u., |e| = me = = 1 and the velocity of light c ≈137.036) are used below.

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Section: Attosecond Compton Linesmentioning

confidence: 99%