Police Care in the Activities of National Police Units of Ukraine

The article is devoted to the study of the relationship between the concepts of "care" and "police care", the definition of the grounds and conditions for the use of police care and the analysis of problematic aspects of the use of this police measure in the activities of the National Police units. The problematic issues of establishing police guardianship of minors under the age of 16 are investigated, the status and categories of persons left without guardianship are determined, attention is drawn to the lack of unity of legislative prescriptions regarding the age of a person to whom police guardianship can be applied, which affects performance of the National Police employees of their functional duties. The conclusion on the need to further improve the provisions of Article 41 of the Law of Ukraine "On the National Police" in order to reconcile with the provisions of the Law of Ukraine "On Psychiatric Care" is substantiated, since they are ignored when applying police custody to a person who is suspected of escaping from a psychiatric institution or a specialized medical institution , without the involvement of a psychiatrist will lead to a violation of the presumption of mental health and the right of a citizen to express his informed consent to receive psychiatric medical assistance. The author comes to the conclusion that the regulatory principles of police care as a preventive police measure, defined in the Law of Ukraine "On the National Police", on the one hand contain legislative novelties unknown to the past practice of law enforcement agencies, and on the other hand, the mechanism of their application requires clarification and concretization in view of the aforementioned gaps in lawmaking. Subjects of the application of police care to the persons defined in Part 1 of Article 41 of the specified Law are, first of all, patrol police officers who patrol a certain territory of a settlement or outside its boundaries. At the same time, the list of such persons needs to be concretized and normatively consolidated, taking into account the analysis of the results of law enforcement practice

Low-temperature embrittlement and fracture of metals with different crystal lattices – Dislocation mechanisms

The state of a low-temperature embrittlement (cold brittleness) and dislocation mechanisms for formation of the temperature of a ductile-brittle transition and brittle fracture of metals (mono- and polycrystals) with various crystal lattices (BCC, FCC, HCP) are considered. The conditions for their formation connected with a stress-deformed state and strength (low temperature yield strength) as well as the fracture breaking stress and mobility of dislocations in the top of a crack of the fractured metal are determined. These conditions can be met for BCC and some HCP metals in the initial state (without irradiation) and after a low-temperature damaging (neutron) irradiation. These conditions are not met for FCC and many HCP metals. In the process of the damaging (neutron) irradiation such conditions are not met also and the state of low-temperature embrittlement of metals is absent (suppressed) due to arising various radiation dynamic processes, which increase the mobility of dislocations and worsen the strength characteristics

Secondary neutrons as the main source of neutron-rich fission products in the bombardment of a thick U target by 1 GeV protons

The diffusion-effusion model has been used to analyse the release and yields of Fr and Cs isotopes from uranium carbide targets of very different thicknesses (6.3 and 148 g/cm2) bombarded by a 1 GeV proton beam. Release curves of several isotopes of the same element and production efficiency versus decay half-life are well fitted with the same set of parameters. Comparison of efficiencies for neutron-rich and neutron-deficient Cs isotopes enables separation of the contributions from the primary (p+238U) and secondary (n + 238U) reactions to the production of neutron-rich Cs isotopes. A rather simple calculation of the neutron contribution describes these data fairly well. The FLUKA code describes the primary and secondary-reaction contributions to the Cs isotopes production efficiencies for different targets quite well

Production of Cs and Fr isotopes from a high-density UC targets with different grain dimensions

International audienceA UC target material of 11.3 ± 0.5 g/cm3 uranium density with the grain size of 20 and 5 μm manufactured in a form of pills by the method of powder metallurgy has been tested on-line within the temperature range of 1800–2100 ◦C. The mass of uranium exposed to the beam was 4–7 g. The yields and release rates of Cs and Fr isotopes produced by fission and spallation reactions of 238U by 1 GeV protons have been measured. The yields of Cs and Fr isotopes obtained from the tested target materials have been compared, including yields of very short-lived Fr isotopes with half-lives down to 1 ms. Temperatureresistant materials (porous graphite and tantalum foil) have been used for the internal-container construction, which holds the UC target pills inside a tungsten external container heated by the resistant heating. The fastest release and the highest efficiency for short-lived isotopes have been obtained for the targets with the internal container manufactured from the tantalum foil. Results of on-line tests of a big mass target (730 g of 5 μm grain UC target material) have been discussed

Electron beam-plasma ionizing target for the production of neutron-rich nuclides

The production of neutron rich Ag, In and Sn isotopes from a UC target of high density has been investigate at the IRIS facility. An electron beam-plasma ion source has been used to ionize the species produced

Electron beam - plasma ionizing target for production of neutron-rich nuclides

International audienceProduction of neutron-rich Ag, In and Sn isotopes from uranium carbide target of a high density has been investigated at the IRIS facility in the PLOG (PNPI-Legnaro-GANIL-Orsay) collaboration. The UC target material with a density of 12 g/cm3 was prepared by the method of powder metallurgy in a form of pellets of 2 mm thickness, 11 mm in diameter and grain dimensions of about 20 microns. The uranium target mass of 31g was exposed at a 1 GeV proton beam. For the ionization of produced species the electron beam - plasma ionization inside the target container (ionizing target) has been used. For the first time the new high density UC target material was exploited with the electron-plasma ionization. Yields of Ag and Sn isotopes have been measured in the target temperature range of (1900-2100) °C. The yields of some Pd, In and Cd isotopes were measured as well to compare to previously measured ones from a high density uranium carbide target having a ceramic-like structure. For the first time a nickel isotope was obtained from a high density UC target

Electron beam - plasma ionizing target for production of neutron-rich nuclides

EMIS conference (revised version