Zobrazeno 1 - 10
of 973
pro vyhledávání: '"Malyshev, A V"'
Autor:
Malyshev, Dmitry V.
Excess of gamma rays with a spherical morphology around the Galactic center (GC) observed in the Fermi large area telescope (LAT) data is one of the most intriguing features in the gamma-ray sky. The excess has been interpreted by annihilating dark m
Externí odkaz:
http://arxiv.org/abs/2406.03990
Autor:
Skripnikov, Leonid V., Prosnyak, Sergey D., Malyshev, Aleksei V., Athanasakis-Kaklamanakis, Michail, Brinson, Alex Jose, Minamisono, Kei, Cruz, Fabian C. Pastrana, Reilly, Jordan Ray, Rickey, Brooke J., Ruiz, Ronald. F. Garcia
Publikováno v:
Phys. Rev. A 110, 012807 (2024)
A method for calculating the field shift contribution to isotope shifts in many-electron atoms, incorporating quantum electrodynamics (QED) effects, is introduced. We also implement the model QED approach to incorporate QED contribution to the nuclea
Externí odkaz:
http://arxiv.org/abs/2404.13369
Methods of bound-state QED that treat the self-energy contributions to the Lamb shift within the partial-wave expansion usually face the problem of slow convergence of the latter. Inspired by an approach formulated in [J. Sapirstein and K. T. Cheng,
Externí odkaz:
http://arxiv.org/abs/2404.04742
Autor:
Tupitsyn, I. I., Savelyev, I. M., Kozhedub, Y. S., Telnov, D. A., Dulaev, N. K., Malyshev, A. V., Prokhorchuk, E. A., Shabaev, V. M.
The problem of orbital collapse of the $5g$ and $6f$ electrons in atoms of superheavy elements (SHE) is considered. Previously, the presence of the orbital collapse was established for the $4f$ and $5f$ elements of the periodic table. Because of the
Externí odkaz:
http://arxiv.org/abs/2402.02609
Autor:
Malyshev, Dmitry V.
Excess of gamma rays around the Galactic center (GC) observed in the Fermi Large Area Telescope (LAT) data is one of the most intriguing features in the gamma-ray sky. The spherical morphology and the spectral energy distribution with a peak around a
Externí odkaz:
http://arxiv.org/abs/2401.04565
Autor:
Malyshev, Dmitry V.
Probabilistic classification of unassociated Fermi-LAT sources using machine learning methods has an implicit assumption that the distributions of associated and unassociated sources are the same as a function of source parameters, which is not the c
Externí odkaz:
http://arxiv.org/abs/2307.09584
Autor:
Kotov, Artem A., Glazov, Dmitry A., Malyshev, Aleksei V., Shabaev, Vladimir M., Plunien, Günter
The rigorous two-center approach based on the dual-kinetically balanced finite-basis-set expansion is applied to one-electron, heteronuclear diatomic Bi-Au, U-Pb, and Cf-U quasimolecules. The obtained $1\sigma$ ground-state energies are compared with
Externí odkaz:
http://arxiv.org/abs/2305.04233
Publikováno v:
Optics and Spectroscopy, 2023, Vol. 131, No. 3
For heliumlike uranium, the energies of the singly-excited $1sns$, $1snp$, and $1snd$ states with $n\leq 4$ and the probabilities of the one-photon $1s3d\to 1s2p$, $1s3p\to 1s2s$, $1s3p\to 1s2p$ and $1s4d\to 1s2p$ transitions are evaluated. The calcu
Externí odkaz:
http://arxiv.org/abs/2302.14626
Publikováno v:
Phys. Rev A 107, 042806 (2023)
The bound-state QED approach is applied to calculations of the $2p_{3/2} \rightarrow 2s$ transition energies in He-, Li-, and Be-like uranium. For U$^{90+}$ and U$^{89+}$, standard perturbation theory for a single level is employed, while the calcula
Externí odkaz:
http://arxiv.org/abs/2302.05663
Autor:
Malyshev, Dmitry V., Bhat, Aakash
In the paper we develop multi-class classification of Fermi-LAT gamma-ray sources using machine learning with hierarchical determination of classes. One of the main challenges in the multi-class classification of the Fermi-LAT sources is that the siz
Externí odkaz:
http://arxiv.org/abs/2301.07412