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We present an analysis of the spectator mechanism of Δ-isobar production in the pion photoproduction on nuclei with the emission of two nucleons. The reaction mechanism is studied within the framework of the ΔN-correlation model, which considers the isobar and nucleon of the ΔN-system produced in the nucleus at the virtual NN→ΔN transition to be in a dynamic relationship. The two-particle transition operator for nuclei is obtained by the S-matrix approach. We consider the properties of the spectator mechanism of isobar production using the example of the reaction 16O(γ,π−pn)14O. Numerical estimates of the cross-section are obtained in the kinematic region, where it is possible to expect the manifestation of bound isobar-nuclear states. [ABSTRACT FROM AUTHOR]

The 2015 update of the discovery of nuclide project is presented. Twenty new nuclides were observed for the first time in 2015. An overall review of all previous assignments was made in order to apply the discovery criteria consistently to all elements. In addition, a list of isotopes published so far only in conference proceedings or internal reports is included. [ABSTRACT FROM AUTHOR]

Low energy quadrupole excitations of the 84-110Mo nuclei are studied in the frame of the general Bohr collective model. The potential energy and inertial functions are calculated using the ATDHFB method starting from the Skyrme effective interaction. Obtained energies of the 21, 41, 22 and 02 levels and B(E2) values for the 21 → 0g.s transitions are in good agreement with experimental data. [ABSTRACT FROM AUTHOR]