Zobrazeno 1 - 10
of 1 822
pro vyhledávání: '"Kozlov, M."'
We calculated QED corrections to the $E1$ transition amplitudes in Ne-like iron and nickel. For the $2p \to 3d$ transitions the dominant effect came from the many-electron mixing, or electronic correlations. For the $2p \to 3s$ transitions the correl
Externí odkaz:
http://arxiv.org/abs/2410.02489
Autor:
Agafonova, I. I., Bayandina, O. S., Gong, Y., Henkel, C., Kim, Kee-Tae, Kozlov, M. G., Lankhaar, B., Levshakov, S. A., Menten, K. M., Ubachs, W., Val'tts, I. E., Yang, W.
We present results on simultaneous observations of Class~I methanol masers at 25, 36, and 44 GHz towards 22 Galactic targets carried out with the Effelsberg 100-m telescope. The study investigates relations between the hyperfine (HF) structure of the
Externí odkaz:
http://arxiv.org/abs/2407.11657
Numerical calculations of the sensitivity coefficients, Q_mu, of microwave molecular transitions in the ground torsion-rotation state of deuterated methanol (CH3OD, CD3OH, and CD3OD) to small variations in the fundamental physical constant mu = me/mp
Externí odkaz:
http://arxiv.org/abs/2406.10299
Autor:
Muzalevskii, I. A., Shulgina, N. B., Bezbakh, A. A., Chudoba, V., Krupko, S. A., Belogurov, S. G., Biare, D., Egorova, I. A., Fomichev, A. S., Gazeeva, E. M., Gorshkov, A. V., Grigorenko, L. V., Kaminski, G., Khirk, M., Kiselev, O., Kostyleva, D. A., Kozlov, M. Yu., Mauyey, B., Mukha, I., Nikolskii, E. Yu., Parfenova, Yu. L., Piatek, W., Quynh, A. M., Schetinin, V. N., Serikov, A., Sidorchuk, S. I., Sharov, P. G., Slepnev, R. S., Stepantsov, S. V., Swiercz, A., Szymkiewicz, P., Ter-Akopian, G. M., Zalewski, B.
Search for the population of the low-energy continuum of tetraneutron system was performed for reactions of the $^{8}$He beam on deuterium target. These studies are performed for the data [I.A. Muzalevskii et al., Phys. Rev. C 103, 044313 (2021)], pr
Externí odkaz:
http://arxiv.org/abs/2312.17354
Publikováno v:
Atoms, 12, 3 (2024)
Most modern calculations of many-electron atoms use basis sets of atomic orbitals. An accurate account for the electronic correlations in heavy atoms is very difficult computational problem and optimization of the basis sets can reduce computational
Externí odkaz:
http://arxiv.org/abs/2312.07782
We present results on numerical calculations of the sensitivity coefficients, Qmu, of microwave molecular transitions in (13C)H3OH and CH3(18O)H to the hypothetical variation in the fundamental physical constant mu - the electron-to-proton mass ratio
Externí odkaz:
http://arxiv.org/abs/2310.04485
Autor:
Kozlov, M. G., Oleynichenko, A. V., Budker, D., Glazov, D. A., Lomachuk, Y. V., Shabaev, V. M., Titov, A. V., Tupitsyn, I. I., Volotka, A. V.
The $^{229}$Th nucleus has a long-lived isomeric state $A^*$ at 8.338(24) eV [Kraemer et al, Nature, \textbf{617}, 706 (2023)]. This state is connected to the ground state by an M1 transition. For a hydrogenlike Th ion in the $1s$ state the hyperfine
Externí odkaz:
http://arxiv.org/abs/2308.05173
We address the problem of lattice light shifts in the Sr clock caused by multipolar M1 and E2 atom-field interactions. We presented a simple but accurate formula for the magnetic-dipole polarizability that takes into account both the positive and neg
Externí odkaz:
http://arxiv.org/abs/2306.10173
The magnetic hyperfine structure constants have been calculated for low-lying levels in neutral potassium atom taking into account the Bohr--Weisskopf (BW) and Breit--Rosenthal (BR) effects. According to our results the $4p_{1/2}$ state of K~I is fre
Externí odkaz:
http://arxiv.org/abs/2211.11914
Publikováno v:
Nucl. Instruments Methods Phys. Res. Sect. B Beam Interact. with Mater. Atoms 530, 48 (2022)
A detailed analysis of the bremsstrahlung spectrum at nonrelativistic electron scattering on argon and xenon is carried out. It is shown that the approximate formulas widely used for the description of bremsstrahlung spectra lead to predictions that
Externí odkaz:
http://arxiv.org/abs/2206.01388