Peer-Review Publications


Bian Yang, Z. W. Wu, Deyang Yu, Caojie Shao, Yingli Xue, Wei Wang, Zhangyong Song, Mingwu Zhang, Junliang Liu, Rongchun Lu, Yehong Wu, Fangfang Ruan, Yuezhao Zhang, S. Fritzsche, and Xiaohong Cai
Nearly isotropic Lyman-α1 radiation following nonradiative electron capture in Xe54+ + Kr collisions at 197 MeV u−1
Journal of Physics B: Atomic, Molecular and Optical Physics, 56 (5) :055203 (February 2023)
Publisher: IOP Publishing
We measured the angular distribution of the subsequently emitted Lyman-α 1 transition of Xe53+* ions following nonradiative electron capture in collisions of 197 MeV u−1 Xe54+ projectiles with gaseous krypton target. The alignment of the projectile 2p 3/2 state and the relative population of its magnetic substates were further deduced. In contrast to the available lower energy results (Yang et al 2020 Phys. Rev. A 102 042803), it is found that at 197 MeV u−1 the Lyman-α 1 radiation becomes much less anisotropic and the magnetic substates are nearly statistically populated. Moreover, the experimental findings are compared with the results of the corresponding radiative electron capture mechanism, obviously different energy dependence of the magnetic-substate population is obtained and discussed using semiclassical arguments, which help reveal the population mechanism of excited states in collisions of highly charged high-Z ions with atoms.
Maximilian Karst, Pauline Pfaller, Robert Klas, Ziyao Wang, Philipp Gierschke, Jan Rothhardt, and Jens Limpert
22-W average power high pulse energy multipass-cell-based post-compression in the green spectral range
Optics letters, 48 (5) :1300 ( 2023)
Publisher: OSA
ISSN: 0146-9592
Jorge Machado, Nancy Paul, Gabrielle Soum-Sidikov, Louis Duval, Stéphane Macé, Robert Lötzsch, Martino Trassinelli, and Paul Indelicato
Absolute measurement of the relativistic magnetic dipole transition in He-like sulfur
Physical review / A, 107 (3) :032821 ( 2023)
Publisher: APS
ISSN: 2469-9926
A. Fedotov, A. Ilderton, Felix Karbstein, B. King, D. Seipt, H. Taya, and G. Torgrimsson
Advances in QED with intense background fields
Physics Reports, 1010 :1 (April 2023)
Upcoming and planned experiments combining increasingly intense lasers and energetic particle beams will access new regimes of nonlinear, relativistic, quantum effects. This improved experimental capability has driven substantial progress in QED in intense background fields. We review here the advances made during the last decade, with a focus on theory and phenomenology. As ever higher intensities are reached, it becomes necessary to consider processes at higher orders in both the number of scattered particles and the number of loops, and to account for non-perturbative physics (e.g. the Schwinger effect), with extreme intensities requiring resummation of the loop expansion. In addition to increased intensity, experiments will reach higher accuracy, and these improvements are being matched by developments in theory such as in approximation frameworks, the description of finite-size effects, and the range of physical phenomena analysed. Topics on which there has been substantial progress include: radiation reaction, spin and polarisation, nonlinear quantum vacuum effects and connections to other fields including physics beyond the Standard Model.
J. Sommerfeldt, V. A. Yerokhin, Thomas Stöhlker, and A. Surzhykov
All-Order Coulomb Corrections to Delbrück Scattering above the Pair-Production Threshold
Physical review letters, 131 (6) :061601 ( 2023)
Publisher: APS
ISSN: 0031-9007
Albrecht Steinkopff, Christopher Aleshire, Arno Klenke, Cesar Jauregui, and Jens Limpert
Analysis of optical core-to-core coupling: challenges and opportunities in multicore fiber amplifiers
Optics express, 31 (17) :28564 ( 2023)
Publisher: Optica
ISSN: 1094-4087
W. Middents, G. Weber, A. Gumberidze, C. Hahn, T. Krings, N. Kurz, P. Pfäfflein, N. Schell, U. Spillmann, S. Strnat, M. Vockert, A. Volotka, A. Surzhykov, and T. Stöhlker
Angle-differential cross sections for Rayleigh scattering of highly linearly polarized hard x rays on Au atoms
Physical Review A, 107 :012805 (January 2023)
We perform a study on Rayleigh scattering of highly linearly polarized hard x rays on a thin Au foil target. In the study the angular distribution of the scattered radiation is analyzed in a relativistic regime both within and out of the plane of polarization of the incident beam. Within this experiment we scatter a synchrotron beam with a photon energy of 175 keV on a high-Z target foil, namely, gold. Our findings correlate well with state-of-the-art calculations of the scattering process performed in the framework of quantum electrodynamics and may have considerable impact on future experiments regarding a polarization-resolved analysis of Delbrück scattering. Furthermore, we show that the angular distribution of Rayleigh scattering can be used for a highly sensitive determination of the degree and orientation of the linear polarization of the incident hard-x-ray beam, if we rely on the theoretical framework.
Sizhong Wu, Z. Q. Tian, and Stephan Fritzsche
Angular distribution of the characteristic line $1s2p\,^3P_2 \rightarrow 1s^2\,^1S_0$ of thallium ions: hyperfine-induced multipole interference
The European physical journal / D, 77 (6) :95 ( 2023)
Publisher: Springer
ISSN: 1434-6060
Holger Gies, and Abdol Sabor Salek
Asymptotically safe Hilbert–Palatini gravity in an on-shell reduction scheme
The European physical journal / C, 83 (2) :173 ( 2023)
Publisher: Springer
ISSN: 1434-6044
Arthur Schönberg, Haydar Sarper Salman, Ayhan Tajalli, Sonu Kumar, Ingmar Hartl, and Christoph Heyl
Below-threshold harmonic generation in gas-jets for Th-229 nuclear spectroscopy
Optics express, 31 (8) :12880 ( 2023)
Publisher: Optica
ISSN: 1094-4087
Daniel Santiago Penagos Molina, Lars Loetgering, Wilhelm Eschen, Jens Limpert, and Jan Rothhardt
Broadband ptychography using curved wavefront illumination
Optics express, 31 (16) :26958 ( 2023)
Publisher: Optica
ISSN: 1094-4087
Binghui Zhu, and Thomas Stöhlker
Calculation of Radiative Recombination Rates for Hydrogen-Like Ions at High-Z
Proceedings of FAIR next generation scientists - 7th Edition Workshop — PoS(FAIRness2022) - Sissa Medialab Trieste, Italy, 2023. - ISBN - doi:10.22323/1.419.0065
FAIR next generation scientists - 7th Edition Workshop, Paralia (Pieria) (Greece), 23 May 2022 - 27 May 2022
Publisher: Sissa Medialab Trieste, Italy (May 2023)
Andrey Bondarev, J. H. Gillanders, C. Cheung, M. S. Safronova, and S. Fritzsche
Calculations of multipole transitions in Sn II for kilonova analysis
The European physical journal / D, 77 (7) :126 ( 2023)
Publisher: Springer
ISSN: 1434-6060
C. G. Bruno, J. J. Marsh, T. Davinson, P. J. Woods, P. Black, A. Bräuning-Demian, Jan Glorius, A. Grant, O. Hall, A. Headspith, P. Hindley, I. Lazarus, K. Middleman, Nikolaos Petridis, Michael Lestinsky, Yu. A. Litvinov, R. S. Sidhu, and Thomas Stöhlker
CARME — The CRYRING Array for Reaction MEasurements
Nuclear instruments $&$ methods in physics research / A, 1048 :168007 ( 2023)
Publisher: North-Holland Publ. Co.
ISSN: 0167-5087
Sobhy Kholaif, Cesar Jauregui, Yiming Tu, and Jens Limpert
Characterization of transverse mode instability with a 4-quadrant photodiode
Optics express, 31 (6) :10633 ( 2023)
Publisher: Optica
ISSN: 1094-4087
Stephan Fritzsche, Li-Guang Jiao, Yuan-Cheng Wang, and Jozef E. Sienkiewicz
Collision Strengths of Astrophysical Interest for Multiply Charged Ions
Atoms, 11 (5) :80 ( 2023)
Publisher: MDPI
ISSN: 2218-2004
Yingying An, Xiaozhi Shen, Ping Yuan, and Zhongwen Wu
Collisional-radiative modeling of the 2p3 l ( l = p,d) spectra of N II and application to lightning
Journal of applied physics, 133 (17) :173301 ( 2023)
Publisher: American Inst. of Physics
ISSN: 0021-8979
Maximilian Benner, Maximilian Karst, Cristina Amaya Mendez, Henning Stark, and Jens Limpert
Concept of enhanced frequency chirping for multi-pass cells to improve the pulse contrast
Journal of the Optical Society of America / B, 40 (2) :301 ( 2023)
Publisher: OSA
ISSN: 0740-3224
A. Kirsche, R. Klas, M. Gebhardt, L. Eisenbach, W. Eschen, J. Buldt, H. Stark, J. Rothhardt, and J. Limpert
Continuously tunable high photon flux high harmonic source at 50 – 70 eV
Optics Express, 31 :2744 (January 2023)
A fully tunable table-top extreme ultraviolet source providing state-of-the-art photon flux at energies of 50-70 eV is presented. It is based on a nonlinear blueshift and subsequent high harmonic generation in a gas-filled capillary.
B. Minneker, R. Klas, J. Rothhardt, and S. Fritzsche
Critical Laser Intensity of Phase-Matched High-Order Harmonic Generation in Noble Gases
Photonics, 10 :1 (January 2023)
The efficient generation of high-order harmonic radiation has been a challenging task since the early days of strong-field physics. An essential requirement to achieve efficient high-order harmonic generation inside a gas medium is the phase matching of the high-order harmonic radiation and the incident laser pulse. The dominant contribution to the wave–vector mismatch Δk is associated with the ionization probability of the medium. In this work, we derive two analytical formulas to calculate the critical intensity of a general linearly polarized laser pulse that obey the phase-matching condition Δk=0. The analytic formulas are valid in the tunneling regime (ADK model) and the regime of the tunnel and multi-photon ionization (PPT model), respectively. We compare our results to numerical computations and discuss the scaling of the critical intensity depending on the pulse duration and the wavelength of a realistic incident laser pulse. The analytical approach demonstrated in this work is highly accurate and can compete with the existing numerical computational methods by an error of less than 1% and a decrease in the computation time of approximately 4 to 6 orders of magnitude. This enables complex theoretical studies of the efficiency scaling in HHG or to consider the effects of ground state depletion efficiently.
Lei Xu, Li Guang Jiao, Aihua Liu, Yuan Cheng Wang, Henry E Montgomery Jr, Yew Kam Ho, and Stephan Fritzsche
Critical screening parameters of one-electron systems with screened Coulomb potentials: circular Rydberg states
Journal of physics / B, 56 (17) :175002 ( 2023)
Publisher: IOP Publ.
ISSN: 0022-3700
Rishat Zagidullin, Stefan Tietze, Karl Matthäus Zepf, Jingwei Wang, and Sergey Rykovanov
Density-dependent carrier-envelope phase shift in attosecond pulse generation from relativistically oscillating mirrors
Matter and radiation at extremes, 8 (6) :064004 ( 2023)
Publisher: AIP Publishing
ISSN: 2468-080X
Laura Silletti, Ammar Wahid, Esmerando Escoto, Prannay Balla, Supriya Rajhans, Katinka Horn, Lutz Winkelmann, Vincent Wanie, Andrea Trabattoni, Christoph Heyl, and Francesca Calegari
Dispersion-engineered multi-pass cell for single-stage post-compression of an ytterbium laser
Optics letters, 48 (7) :1842 ( 2023)
Publisher: Soc.
ISSN: 0146-9592
Zhi Ling Zhou, Li Guang Jiao, Aihua Liu, Yuan Cheng Wang, Henry E. Montgomery, Yew Kam Ho, and Stephan Fritzsche
Effective pressures on the outer-, inner-, and shell-confined hydrogenic atoms
The European physical journal / D, 77 (5) :78 ( 2023)
Publisher: Springer
ISSN: 1434-6060
Lei Xu, Li Guang Jiao, Aihua Liu, Henry E. Montgomery, Yew Kam Ho, and Stephan Fritzsche
Energy spectra and asymptotic laws of the radial screened Coulomb potential
Physics letters / A, 483 :129064 ( 2023)
Publisher: North-Holland Publ.
ISSN: 0031-9163