Zobrazeno 1 - 10
of 780
pro vyhledávání: '"Keitel, Christoph"'
Attosecond pulses of coherent extreme ultraviolet (XUV) light are instrumental for studying sub-atomic dynamics, and are often produced from a free electron laser (FEL) by electron microbunches in an undulator. An optical-FEL (OFEL) utilizes a counte
Externí odkaz:
http://arxiv.org/abs/2411.17631
The two-loop self-energy correction to the bound-electron $g$-factor in hydrogenlike ions is investigated, taking into account the electron-nucleus interaction exactly. This all-order calculation is required to improve the total theoretical uncertain
Externí odkaz:
http://arxiv.org/abs/2410.10421
Autor:
Dickopf, Stefan, Sikora, Bastian, Kaiser, Annabelle, Müller, Marius, Ulmer, Stefan, Yerokhin, Vladimir A., Harman, Zoltán, Keitel, Christoph H., Mooser, Andreas, Blaum, Klaus
Publikováno v:
Nature 632, 757-761 (2024)
Many powerful tests of the Standard Model of particle physics and searches for new physics with precision atomic spectroscopy are plagued by our lack of knowledge of nuclear properties. Ideally, such properties may be derived from precise measurement
Externí odkaz:
http://arxiv.org/abs/2409.06306
Autor:
Togawa, Moto, Kühn, Steffen, Shah, Chintan, Zaystev, Vladimir A., Oreshkina, Natalia S., Buck, Jens, Bernitt, Sonja, Steinbrügge, René, Seltmann, Jörn, Hoesch, Moritz, Keitel, Christoph H., Pfeifer, Thomas, Leutenegger, Maurice A., López-Urrutia, José R. Crespo
The transition energies of the two $1s$-core-excited soft X-ray lines (dubbed q and r) from $1s^2 2s ^1S_{1/2}$ to the respective upper levels $1s(^{2}S)2s2p(^{3}P) ^{2}P_{3/2}$ and $^{2}P_{1/2}$ of Li-like oxygen, fluorine and neon were measured and
Externí odkaz:
http://arxiv.org/abs/2408.12219
The nuclear isomeric state $^{229m}$Th with an exceptionally low excitation energy makes the $^{229}$Th isotope a crucial candidate for nuclear clocks and many other applications. Efficient and controllable production of $^{229m}$Th is essential and
Externí odkaz:
http://arxiv.org/abs/2406.12497
A method for the generation of ultrarelativistic electron beams with high spin polarization is put forward, where a tightly-focused linearly-polarized ultraintense laser pulse interacts with a nonprepolarized transverse-size-tailored solid target. Th
Externí odkaz:
http://arxiv.org/abs/2406.05493
A method to compute the excitation of narrow transitions at hard x-ray energies by short focused x-ray pulses is developed. In particular, the effect of thin-film cavities on the pulse propagation is incorporated via a semi-analytical algorithm requi
Externí odkaz:
http://arxiv.org/abs/2405.12780
Strong excitation of nuclear resonances, particularly of M\"ossbauer nuclei, has been a longstanding goal and the advance of novel x-ray sources is promising new options in this regard. Here we map out the necessary experimental conditions for the mo
Externí odkaz:
http://arxiv.org/abs/2405.12773
A relativistic analytical theory of strong field ionization applicable across the regimes of the deep-tunneling up to the over-barrier ionization (OTBI) is developed, incorporating the effects of the polarization of the atomic bound state and the Sta
Externí odkaz:
http://arxiv.org/abs/2403.11285
Autor:
Door, Menno, Yeh, Chih-Han, Heinz, Matthias, Kirk, Fiona, Lyu, Chunhai, Miyagi, Takayuki, Berengut, Julian C., Bieroń, Jacek, Blaum, Klaus, Dreissen, Laura S., Eliseev, Sergey, Filianin, Pavel, Filzinger, Melina, Fuchs, Elina, Fürst, Henning A., Gaigalas, Gediminas, Harman, Zoltán, Herkenhoff, Jost, Huntemann, Nils, Keitel, Christoph H., Kromer, Kathrin, Lange, Daniel, Rischka, Alexander, Schweiger, Christoph, Schwenk, Achim, Shimizu, Noritaka, Mehlstäubler, Tanja E.
The Standard Model of particle physics describes the properties of elementary particles and their interactions remarkably well, but in particular does not account for dark matter. Isotope-shift spectroscopy is a sensitive probe of fifth forces and ne
Externí odkaz:
http://arxiv.org/abs/2403.07792