# FS-CFEL-3

 2017-04-2512:23 [PUBDB-2017-01875] Journal Article et al Laser control over the ultrafast Coulomb explosion of N$_{2}$$^{2+} after Auger decay: A quantum-dynamics investigation Physical review / A 95(4), 043419 (2017) [10.1103/PhysRevA.95.043419] By theoretical calculation, we demonstrate the possibility to control and partially suppress the Coulomb explosion of N_2 molecules after core-level photoionization by an x-ray laser and subsequent Auger decay. This is achieved by means of a femtosecond infrared laser pulse interacting with the N_{2}$$^{2+}$ dication produced by the x-ray pulse [...] OpenAccess: PDF; 2017-04-1809:40 [PUBDB-2017-01674] Journal Article Santra, R. Interplay between relativistic energy corrections and resonant excitations in x-ray multiphoton ionization dynamics of Xe atoms Physical review / A 95(4), 043412 (2017) [10.1103/PhysRevA.95.043412]   In this paper, we theoretically study x-ray multiphoton ionization dynamics of heavy atoms taking into account relativistic and resonance effects. When an atom is exposed to an intense x-ray pulse generated by an x-ray free-electron laser (XFEL), it is ionized to a highly charged ion via a sequence of single-photon ionization and accompanying relaxation processes, and its final charge state is limited by the last ionic state that can be ionized by a single-photon ionization [...] OpenAccess: PDF; 2017-03-2812:37 [PUBDB-2017-01478] Journal Article Santra, R. Electronic decoherence following photoionization: Full quantum-dynamical treatment of the influence of nuclear motion Physical review / A 95(3), 033425 (2017) [10.1103/PhysRevA.95.033425]   Photoionization using attosecond pulses can lead to the formation of coherent superpositions of the electronic states of the parent ion. However, ultrafast electron ejection triggers not only electronic but also nuclear dynamics—leading to electronic decoherence, which is typically neglected on time scales up to tens of femtoseconds [...] OpenAccess: PDF; 2017-03-0212:30 [PUBDB-2017-01255] Journal Article Santra, R. Compton spectra of atoms at high x-ray intensity Journal of physics / B 50(6), 064003 (2017) [10.1088/1361-6455/aa59cb]   Compton scattering is the nonresonant inelastic scattering of an x-ray photon by an electron and has been used to probe the electron momentum distribution in gas-phase and condensed-matter samples. In the low x-ray intensity regime, Compton scattering from atoms dominantly comes from bound electrons in neutral atoms, neglecting contributions from bound electrons in ions and free (ionized) electrons. [...] Restricted: PDF; 2017-02-0708:59 [PUBDB-2017-00884] Journal Article et al State-resolved attosecond reversible and irreversible dynamics in strong optical fields Nature physics -, - (2017) [10.1038/nphys4027]   Restricted: PDF; 2017-02-0708:28 [PUBDB-2017-00883] Journal Article Schirmer, J. Finite-temperature second-order many-body perturbation theory revisited Chemical physics 482, 355 - 361 (2017) [10.1016/j.chemphys.2016.08.001]   We present an algebraic, nondiagrammatic derivation of finite-temperature second-order many-body perturbation theory [FT-MBPT(2)], using techniques and concepts accessible to theoretical chemical physicists. We give explicit expressions not just for the grand potential but particularly for the mean energy of an interacting many-electron system. [...] Published on 2016-08-04. Available in OpenAccess from 2017-08-04.: PDF; Restricted: PDF; 2017-02-0208:24 [PUBDB-2017-00832] Journal Article et al Electron-ion coupling in semiconductors beyond Fermi's golden rule Physical review / B 95(1), 014309 (2017) [10.1103/PhysRevB.95.014309]   In the present work, a theoretical study of electron-phonon (electron-ion) coupling rates in semiconductors driven out of equilibrium is performed. Transient change of optical coefficients reflects the band gap shrinkage in covalently bonded materials, and thus, the heating of atomic lattice. [...] OpenAccess: PDF; 2017-01-2709:16 [PUBDB-2017-00784] Journal Article Santra, R. Time-dependent configuration-interaction-singles calculation of the 5 $p$-subshell two-photon ionization cross section in xenon Physical review / A 95(1), 013415 (2017) [10.1103/PhysRevA.95.013415]   The 5p two-photon ionization cross section of xenon in the photon-energy range below the one-photon ionization threshold is calculated within the time-dependent configuration-interaction-singles (TDCIS) method. The TDCIS calculations are compared to random-phase-approximation calculations [Wendin et al., J. [...] OpenAccess: PDF; 2017-01-0615:55 [PUBDB-2017-00237] Journal Article Volkov, A. E. Corrigendum: Time-resolved electron kinetics in swift heavy ion irradiated solids Journal of physics / D 49(36), 369501 (2016) [10.1088/0022-3727/49/36/369501]   Restricted: PDF; 2017-01-0512:32 [PUBDB-2017-00169] Journal Article et al Ultrafast electron diffraction imaging of bond breaking in di-ionized acetylene Science 354(6310), 308 - 312 (2016) [10.1126/science.aah3429]   Visualizing chemical reactions as they occur requires atomic spatial and femtosecond temporal resolution. Here, we report imaging of the molecular structure of acetylene (C$_2$H$_2$) 9 femtoseconds after ionization. [...] Restricted: PDF;