В данной работе изложены основные положения модели Кварк-глюонных струн (КГСМ) для описания неупругих взаимодействий легких ядер при высоких энергиях. Даны основные идеи модели КГСМ, такие как процесс образования кварк-глюонных струн и выбор их ограниченного количества, моделирование разрыва струны с образованием адронов. Данные теоретических расчетов по КГСМ сопоставлены с экспериментальными результатами, полученными для \(d\) C-неупругих взаимодействий. Коротко описана методика получения экспериментальных данных. Анализ и сопоставление модельных и экспериментальных информаций показывает, что модель КГСМ хорошо воспроизводит взаимодействия легких сталкивающихся ядер при энергиях 4.2 ГэВ/ \(c\) и она применима до энергии ядерных взаимодействий 10 ГэВ/нуклон.

The fundamentals of the quark–gluon string (QGS) model for describing inelastic interactions of light nuclei at high energies are outlined. Basic ideas of the QGS model, which include the formation of quark–gluon strings, the choice of their limited number, and a simulation of breaking of a string with hadron formation, are presented. The results of theoretical calculations based on the QGS model are compared with experimental data obtained for inelastic d C interactions. A brief account of the procedure for obtaining these experimental data is given. An analysis and a comparison of model results and experimental information shows that the QGS model reproduces faithfully the interactions of colliding light nuclei at momenta around 4.2 GeV/ c and is applicable up to nuclear-interaction energies corresponding to 10 GeV per nucleon.

Ushbu maqolada yadro reaktorlarining nazariy asoslari va tajribada olingan xarakteristikalari keltirilgan. Zanjir reaksiyada energiya ajralishi mexanizmi bayon etilgan. Hozirgi zamon reaktorlari ishlash tamoyilining asosiy tugunlari hamda reaktorlar yordamida yadro energiyasini hosil qilish jarayoni keltirilgan. Yadro reaktorlari himoya qobig‘ida ishlatiluvchi ba’zi elementlarning tez neytronlar bilan ta’sirlashuvi bo‘yicha tajriba ma’lumotlari berilgan

The new JINR project [1] is aimed at studies of highly excited nuclear matter created in nuclei by a high-energy deuteron beam. The matter is studied through observation of its particular decay products - pairs of energetic particles with a wide opening angle, close to 180°. The new precision hybrid magnetic spectrometer SCAN-3 is to be built for detecting charged (π±, K±, p) and neutral (n) particles produced at the JINR Nuclotron internal target in dA collisions. One of the main and complex tasks is a study of low-energy ηA interaction and a search for η-bound states (η-mesic nuclei). Basic elements of the spectrometer and its characteristics are discussed in the article.

We review status and perspectives of the search of the η-mesic nuclei at the synchrotron NUCLOTRON. This article present the results obtained at the spectrometer “SCAN” and the plans to study the interaction of eta-meson with nucleon and modification of the particle properties in the nuclear matter.

Results of a search for quasi-bound states of the η-meson and a target nucleus obtained during several years using the internal target at the Nuclotron d-beam are presented. Formation of η-mesic nuclei was studied in the reaction d + C in the energy interval 1.5 to 2.2 GeV/nucl. Decay products of S11 resonances excited by η-mesons captured by nucleons in the nuclear target have been analyzed. Measurements were performed with a scintillation spectrometer SCAN. Analysis of obtained data is presented.