Issue 3, 2025
Determination of α-decay energies in the heavy element region
Determination of α-decay energies in the heavy element region
V. S. Ulianova$^1$, D. F. Bayramov$^1$, S. V. Sidorov$^2$, M. E. Stepanov$^1$, K. A. Stopani$^2$, T. Yu. Tretyakova$^{1,2}$
Since the discovery of α-decay, one of the main decay channels of unstable atomic nuclei, its intensive study has not ceased. These studies are especially relevant in the field of superheavy elements, since observation of the corresponding chain of α-decays is necessary for the identification of new isotopes. Methods using mass ratios have long been successfully used to predict the masses of unknown nuclei. The efficiency of the method based on the residual np-interaction coefficient was previously demonstrated on the characteristics of α-decay for isotopes with Z ≤ 106. In this paper, the results for nuclei up to Z = 118 are presented, obtained on the basis of experimental values of Q_α. Estimates of energy and α decay rates obtained from AME2020 and NUBASE2020 data are in good agreement with the 2022–2024 experimental data.
Show AbstractIntegration of Geophysical Time Series Analysis Methods into an Open-Source Software Package
Integration of Geophysical Time Series Analysis Methods into an Open-Source Software Package
M. E. Arzangulyan, N. E. Shapkina
The article presents an open-source software complex for analyzing time series of geophysical quantities. The complex integrates various analytical methods: statistical (ARIMA, SARIMA), spectral (Fourier transform, wavelet analysis), neural network (LSTM), and morphological approaches, as well as tools for anomaly detection. The key features include modular architecture, synthetic data generation capabilities, flexible algorithm parameterization, and interactive visualization of results. The software complex is already applied in researches of our scientific group, particularly for analyzing meteorological data from carbon monitoring sites. The open-source nature ensures the possibility of adapting functionality for specific tasks and further development of the complex by the scientific community.
Show AbstractDilaton generation by electromagnetic field of rotating magnetic dipole momentum of neutron star in it's own gravitational field
Dilaton generation by electromagnetic field of rotating magnetic dipole momentum of neutron star in it's own gravitational field
M. O. Astashenkov$^{1,2}$, V. I. Denisov$^{1,2}$, I. P. Denisova$^{3,4}$
According to dilaton-Maxwell theory, dilatons can be generated by electromagnetic fields with a nonzero electromagnetic field invariant $F_{mn}F^{mn}$, where $F_{mn}$ is the tensor of the electromagnetic field. The paper considers the generation of dilatons in the electromagnetic field of a rotating magnetic dipole moment of a neutron star, taking into account its own gravitational field. Solutions of dilaton field equations were obtained in the weak gravitational field approximation. Based on them, the intensity of dilaton generation was obtained in the approximation $r_g/R_S\ll 1$, where $r_g$ is the Schwarzschild radius and $R_S$ is the radius of the neutron star. It is shown that the intensity of dilaton generation from the rotating magnetic dipole moment of a neutron star is lower in the first order of magnitude than in the case of a flat space-time.
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