Analysis of single-particle energies of doubly magic <Superscript>100,132</Superscript>Sn nuclei within the dispersive optical model

Extrapolation of the single-particle energies E _nlj of the bound states of neutrons and protons in the ^{112,116,118,120,124}Sn isotopes has been performed to estimate the values of E _nlj for unstable doubly magic ₅₀ ¹⁰⁰ Sn₅₀ and ₅₀ ¹³² Sn₈₂ nuclei. The estimates obtained are compared with the data derived from the analysis of the decay spectra of neighboring radioactive nuclei and with the results of the calculation within the dispersive optical model.     

Neutron single-particle structure of <Superscript>48</Superscript>Ca, <Superscript>50</Superscript>Ti, <Superscript>52</Superscript>Cr, <Superscript>54</Superscript>Fe,and <Superscript>56</Superscript>Ni nuclei

The change in the neutron single-particle structure of (1f?2p)-shell magic nuclei near the Fermi energy with an increase in the number of protons in the 1f _7/2 subshell from 0 for ⁴⁸Ca to 8 for ⁵⁶Ni has been investigated. Good agreement of the experimental and estimated values of the single-particle energies E _nlj of the bound states of neutrons in these nuclei with the results of calculations within the dispersive optical model is obtained.     

On double magicity of the <Stack><Subscript>28</Subscript><Superscript>68</Superscript></Stack>Ni<Subscript>40</Subscript> nucleus

Single-particle energies E _nlj of neutron states in the ₂₈ ⁶⁸ Ni₄₀ nucleus are estimated on the basis of extrapolation of the experimental values of E _nlj in the ^58,60,62,64Ni isotopes. The data obtained are compared with the results of calculation within the dispersion optical model.     

Calculation of single-particle energies of bound nucleon states in nuclei with 40 ≤ <Emphasis Type="Italic">A</Emphasis> ≤ 208 using global parameters of dispersive optical model potential

Single-particle energies of bound neutron and proton states in nuclei with mass numbers 40 ≤ A ≤ 208 are calculated within the dispersive optical model with different sets of global parameters. The results of the calculation are compared with the experimental data and the predictions of the relativistic mean-field model.     

Identifying the domains of dynamic instability for inhomogeneous shell systems under periodic loads

The paper outlines an approach to identifying the principal dynamic-instability domain for systems composed of shells of revolution with different shapes under axisymmetric periodic loading. The original problem is reduced to one-dimensional eigenvalue problems with respect to the meridional coordinate. Results of calculations for a specific shell system are presented     

Contact Interaction Between a Laminated Shell of Revolution and a Rigid or Elastic Foundation

A method is proposed to solve the contact problem for laminated anisotropic shells of revolution. The method is based on a two-dimensional model that accounts for transverse shears and reduction. Also the method is based on the method of successive approximations, the generalized pseudo-force method, and a numerical-analytical method of solving boundary-value problems. The results obtained for a cylindrical shell of complex thickness structure are compared with those obtained in three-dimensional formulation__________Translated from Prikladnaya Mekhanika, Vol. 41, No. 5, pp. 68–75, May 2005.     

Reaction of 2-thiopyrrolidones with monochloroacetic acid and its methyl ester

Calculations of the electronic structure of 5-alkyl-2-thiopyrrolidones and their oxygen analogs were carried out by the MO LCAO method in the CNDO/2 approximation. The obtained data were used to discuss the reactivity of the investigated compounds in the alkylation of monochloroacetic acid, leading, in the case of 2-thiopyrrolidones, to the formation of the corresponding thiazolinones.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1690–1692, December, 1986.     

Analysis of the single-particle energies of 1<Emphasis Type="Italic">f</Emphasis> and 2<Emphasis Type="Italic">p</Emphasis> proton states in <Superscript>64,66,68</Superscript>Zn nuclei by the mean field model with dispersive optical potential

Single-particle proton energies near the Fermi energy in ^64,66,68Zn are analyzed using the mean field model with dispersive optical potential. Good agreement is obtained between the calculated energies and experimental data. The set of parameters of the dispersive optical potential is compared with the set found for neighboring ^58,60,62,64Ni with the magic number Z = 28.