Results 1 - 10 of 413
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[en] Using multi-nucleon transfer reactions, we are promoting surrogate reactions to obtain nuclear data for wide variety of isotopes including short-lived nuclei. The experiments have been carried out at the JAEA tandem Pelletron accelerator 20UR. (author)
[en] A new approach to the interpretation of the process of spontaneous fission of heavy nuclei is suggested. It is based on nuclear physics data which are obtained in heavy-ion collisions. The process of spontaneous fission consists of three sequential stages: clusterization of the valent nucleons of a heavy nucleus into a light nucleus-cluster, which leads to the formation of a dinuclear system; evolution of the dinuclear system which proceeds by nucleon transfer from the heavy to light nucleus; and decay of the dinuclear system from the equilibrium configuration into two fragments.
[ru]Предлагается новый подход к интерпретации процесса спонтанного деления тяжелых ядер, который опирается на данные, полученные в ядерно-физических исследованиях с тяжелыми ионами. Спонтанное деление включает в себя три последовательно протекающие стадии: кластеризацию валентных нуклонов тяжелого ядра в легкое ядро-кластер, в результате чего возникает двойная ядерная система; эволюцию двойной ядерной системы, протекающую путем передачи нуклонов от тяжелого к легкому ядру, и распад двойной системы из равновесной конфигурации на два ядра-осколка.
[en] The possibility of the interpretation of fission of heavy nuclei as the process of formation, evolution, and decay of a dinuclear system is discussed. The interpretation is based on the nuclear interaction data obtained in heavy-ion nuclear physics investigations
[ru]Обсуждается возможность интерпретации деления тяжелых ядер как процесса формирования, эволюции и распада двойной ядерной системы. Интерпретация основана на данных о ядерных взаимодействиях, полученных в ядерно-физических исследованиях с тяжелыми ионами
[en] Nuclear processes that influence the final fission fragment spins and excitation energies are important from a nuclear technology view-point because they determine the partition and energy release through prompt neutrons and gamma rays. From a fundamental view-point too they are very important and they still constitute a widely open problem in collective nuclear dynamics. These processes are caused by motions of nucleons governed by the changing one-body mean field. Keeping this in mind, the present work examine the fragment spin bearing modes that are active during the final phases of the fission process
[en] The production yields of new neutron-rich 84,86Zn and 90,92Ge isotopes beyond N=50 and isotopes of nuclei with charge numbers Z=64-80 are estimated for future experiments in the multinucleon transfer reactions at energies close to the Coulomb barrier. (author)
[en] The detection of multinucleon transfer channels populated with very low cross-sections allow to study into detail phenomena that are important for a wide class of experiments. Some of the results recently obtained at LNL with the time-of-flight magnetic spectrometer PISOLO are discussed. A comparison between the data and the microscopic calculations performed with the new theoretical model developed by the Copenhagen group are presented
[en] Nuclear K-isomers play an important role in understanding the structure of deformed axially symmetric nuclei. Examples are presented of recent studies in the rare-earth region (A ∼ 180) using deep-inelastic and multi-nucleon transfer reactions, and in the trans-fermium region (A ∼ 250) using fusion-evaporation reactions. A specific two-level mixing scenario is invoked to explain the unusual decay of the Kπ = 13+ isomer in 174Lu. The identification of 2- and 4-quasiparticle isomers in 254No is discussed and predictions of similar isomers in neighboring No and Rf nuclei are presented.
[en] Much attention is lately paid to the symmetric properties of physical systems, particularly the dynamic-symmetric and supersymmetric ones of the multinucleon buildups. The advantage of dynamic symmetries studying is the fact that the all system properties, under such symmetries, may be obtained in the closed form by the quantum numbers of subalgebra. This paper gives a general review of the dynamic symmetry and supersymmetry theory and its application for the concrete nuclei, particularly for palladium and dysprosium isotopes. The rated values are compared with the experimental data