Prospects of a baryon instability search in neutron-antineutron oscillations

The purpose of this article is to review the current status and the future prospects for an experimental neutron-antineutron transition search. Traditional and new experimental techniques are discussed here. In the n {r_arrow} {anti n} search in experiments at existing reactors, it would be possible to increase the discovery potential up to four orders of magnitude for vacuum n {r_arrow} {anti n} transitions relative to the existing experimental level or to achieve the limit of {tau}{sub n-{anti n}{sup {approximately}}} 10{sup 10}s.. With dedicated future reactors and an ultimate experimental layout, it might be possible to reach the limit of 10{sup 11}s. Significant progress in an intranuclear n {r_arrow} {anti n} transition search expected to be made during the next decade by the SuperKamiokande and Icarus detectors. It can be matched, or even exceeded, in a new alternative approach, where unstable long-lived isotopes of technetium are searched in non radioactive deep-mined ores

Search for Free Decay of Negative Pions in Water and Light Materials

We report on a search for the free decay component of pi- stopped in water and light materials. A non-zero value of this would be an indication of anomalous nu_e contamination to the nu_e and nu_mu_bar production at stopped-pion neutrino facilities. No free decay component of pi- was observed in water, Beryllium, and Aluminum, for which upper limits were established at 8.2E-4, 3.2E-3, and 7.7E-3, respectively

Metabolic Transformations in the Area of Municipal Solid Waste Management in Russian Megalopolises: The City of Moscow Case

Received 15 June 2022. Accepted 23 December 2022. Published online 30 December 2022.Based on secondary data analysis and semi-structured expert interviews (n = 90), the study analyses metabolic transformations in the area of municipal solid waste (MSW) management in Russian megalopolises using the city of Moscow as a case study. The findings suggest that the key node that triggered numerous interdependent processes involved the changes introduced in the legislation on MSW management and the decision to shut down several large MSW landfills without the simultaneous implementation of other landfills. These actions affected the health of the population and contributed to environmental inequality. The authors provide recommendations for the mitigation of risks associated with MSW generation, recycling, and storage in large Russian cities.The research was supported by the Russian Science Foundation under Grant No. 22-28-00392 “Waste production and disposal in the megalopolises of Russia: multisectoral and interdisciplinary analysis”

Prospects for baryon instability search with long-lived isotopes

In this paper we consider the possibility of observation of baryon instability processes occurring inside nuclei by searching for the remnants of such processes that could have been accumulated in nature as mm long-lived isotopes. As an example, we discuss here the possible detection of traces of {sup 97}Tc, {sup 98}Tc, and {sup 99}Tc in deep-mined nonradioactive tin ores

Analysis of the Discrete Theory of Radiative Transfer in the Coupled "Ocean-Atmosphere" System: Current Status, Problems and Development Prospects

In this paper, we analyze the current state of the discrete theory of radiative transfer. One-dimensional, three-dimensional and stochastic radiative transfer models are considered. It is shown that the discrete theory provides a unique solution to the one-dimensional radiative transfer equation. All approximate solution techniques based on the discrete ordinate formalism can be derived based on the synthetic iterations, the small-angle approximation, and the matrix operator method. The possible directions for the perspective development of radiative transfer are outlined