N. N. Kolesnikov

Optimal mass formula and Coulomb energy of nuclei

The Coulomb energies of nuclei are calculated on the basis of data from electromagnetic experiments. It is established that the substitution of the Coulomb energies calculated in this way into the formula for the nuclear masses results in loss in quality. On the other hand, the Coulomb energies obtained from the mass formula do not reproduce the nuclear dimensions sufficiently well. It is shown that a consistent description of the binding energies and the nuclear dimensions is possible on introducing the dependence of the mass number in the density parameters of the charge distribution.

(α, n) reactions in cascade γ-transitions

The ratios of the cross sections for the formation of the ground and isomeric states in reactions on107Ag,109Ag, and113In are calculated based on the assumption that at low energies the (α, n) reaction proceeds via a) formation of the compound nucleus, b) evaporation of a neutron, and c) cascade γ-transitions. The number of cascade γ-quanta and the distribution of the excitation energy between the γ-quanta and the neutron is not postulated beforehand (as is usually done), but is calculated based on the statistical theory. By comparing with experiment, the parameter of the spin-dependence of the density of nuclear states is found. It is shown that the average number of γ-quanta in the cascade increases approximately linearly with the energy of the α particles. The energy spectrum of the γ-quanta in the (α, n) reaction is calculated. The distribution of γ-quanta has a maximum at low energies (1 MeV), which, as the energy of the primary particles is increased, moves slowly into the higher energy range while broadening at the same time.

Nuclear size and compressibility

Data on electron scattering on nuclei and spectra of mesoatoms and atoms are used to construct new expressions for nuclear size, which consider the effects of shells and deformations together with the dependence on A and Z. The compressibility of nuclei is also considered.

An potential from analysis of ground and excited states of four-particle hypernuclei and Λp-scattering

AbstractA joint theoretical analysis is made of the binding energies of the ground and excited states of the four-particle hypernuclei

Double hypernuclei and the λ-gL interaction

{}_\Delta ^4 H

Systematics of beta-decay energies and the properties of the nuclear energy surface

and

Multiple-parameter variational calculation ofΛSBe and role of clustering in hypernuclei

{}_\Delta ^4 He