Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Oreshkina, Natalia A."'
Recent precision isotope shift spectroscopy experiments have reported King plot non-linearities that may uncover previously hidden nuclear properties or hint at new force-carrying bosons. Interpreting the data requires many isotope pairs, but suffici
Externí odkaz:
http://arxiv.org/abs/2409.01530
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
Autor:
Valuev, Igor A., Oreshkina, Natalia S.
The nuclear-polarization corrections to the energy levels of highly charged ions are systematically investigated to leading order in the fine-structure constant. To this end, the notion of effective photon propagators with nuclear-polarization insert
Externí odkaz:
http://arxiv.org/abs/2401.05904
Publikováno v:
Phys. Rev. A 108, 052824 (2023)
The nuclear recoil effect, known also as the mass shift, is one of theoretical contributions to the energy levels in muonic atoms. Accurate theoretical predictions are therefore needed for extracting e.g. the nuclear charge radii from experimental sp
Externí odkaz:
http://arxiv.org/abs/2309.14210
Nuclear deformation effects are theoretically investigated in terms of deformation corrections of the electronic binding and transition energies, $g$ factor, and hyperfine splitting constant. By solving the Dirac equation twice, with the nuclear pote
Externí odkaz:
http://arxiv.org/abs/2309.07780
In the paper [1] the process of free muon capture with simultaneous excitation of a nuclear isomer has been suggested, claiming that ``the effect can be detectable for selected isotopes". Here, we argue that this claim can not be confirmed. Briefly,
Externí odkaz:
http://arxiv.org/abs/2307.05577
Autor:
Debierre, Vincent, Oreshkina, Natalia S., Valuev, Igor A., Harman, Zoltán, Keitel, Chistoph H.
When collecting spectroscopic data on at least four isotopes, nonlinearities in the King plot are a possible sign of Physics beyond the Standard Model. In this work, an improved approach to the search for hypothetical new interactions with isotope sh
Externí odkaz:
http://arxiv.org/abs/2207.04868
Autor:
Oreshkina, Natalia S.
The first fully relativistic, rigorous QED calculations of the self-energy correction to the fine-structure levels of heavy muonic atoms are reported. We discuss nuclear model and parameter dependence for this contribution as well as numerical conver
Externí odkaz:
http://arxiv.org/abs/2206.01006
Autor:
Valuev, Igor A., Colò, Gianluca, Roca-Maza, Xavier, Keitel, Christoph H., Oreshkina, Natalia S.
A long-standing problem of fine-structure anomalies in muonic atoms is revisited by considering the $\Delta 2p$ splitting in muonic $^{90}\mathrm{Zr}$, $^{120}\mathrm{Sn}$ and $^{208}\mathrm{Pb}$ and the $\Delta 3p$ splitting in muonic $^{208}\mathrm
Externí odkaz:
http://arxiv.org/abs/2201.09638
Autor:
Kühn, Steffen, Cheung, Charles, Oreshkina, Natalia S., Steinbrügge, René, Togawa, Moto, Bernitt, Sonja, Berger, Lukas, Buck, Jens, Hoesch, Moritz, Seltmann, Jörn, Trinter, Florian, Keitel, Christoph H., Kozlov, Mikhail G., Porsev, Sergey G., Gu, Ming Feng, Porter, F. Scott, Pfeifer, Thomas, Leutenegger, Maurice A., Harman, Zoltán, Safronova, Marianna S., López-Urrutia, José R. Crespo, Shah, Chintan
Publikováno v:
Physical Review Letters 129, 245001 (2022)
One of the most enduring and intensively studied problems of X-ray astronomy is the disagreement of state-of-the art theory and observations for the intensity ratio of two Fe XVII transitions of crucial value for plasma diagnostics, dubbed 3C and 3D.
Externí odkaz:
http://arxiv.org/abs/2201.09070