Browsing by Author "Salamov, DI"

Now showing 1 - 6 of 6
  • No Thumbnail Available
    Item
    Gamow-Teller 1+ states in 208Bi -: art. no. 037303
    Babacan, T; Salamov, DI; Kücükbursa, A
    The properties of the Gamow-Teller (GT) 1(+) states in Bi-208 have been investigated by using the Pyatov-Salamov method. The GT resonance (GTR) energy, the contribution of the GTR beta transition strength to the Ikeda sum rule, and the differential cross sections for the Pb-208(p, n)Bi-208 and Pb-208(He-3, t)Bi-208 charge exchange reactions at different energies have been calculated. Our results show good agreement with experimental values.
  • No Thumbnail Available
    Item
    Calculation of the log(ft) values for the allowed Gamow- Teller transitions in deformed nuclei using the basis of Woods-Saxon wave functions
    Salamov, DI; Kücükbursa, A; Maras, I; Aygör, HA; Babacan, T; Bircan, H
    The present study investigates the log(ft) values of the allowed beta(+/-) decay between odd-A deformed nuclei in the atomic mass regions of 125 less than or equal to A less than or equal to 131 and 159 less than or equal to A less than or equal to 181. Single particle energies and wave functions have been calculated with a deformed Woods-Saxon potential. Calculations have been performed within the framework of a proton-neutron quasi-particle random phase approximation (QRPA), including the schematic residual spin-isospin interaction between nucleons in the particle-hole and particle-particle channels. It has been seen that the results obtained by using the values for the fixed particle-hole and particle-particle interaction strengths, chi(GT)(ph) = 5.2/A(0.7) MeV and chi(GT)(pp) = 0.58/A(0.7) MeV, have good agreement with the experimental observations.
  • No Thumbnail Available
    Item
    Self-consistent calculations of isospin admixtures in the ground states of the N = Z nuclei in the mass region of 50-100
    Babacan, T; Salamov, DI; Kucukbursa, A
    In the present study, based on spherical shell-model wave functions and energies with the pairing and the residual Fermi interaction treated in pn QRPA, the isospin admixture probabilities in the ground state of N = Z even-even nuclei from Z = 28 to Z = 50 are investigated. In these calculations, considering the restoration of the isotopic invariance for the nuclear part of the Hamiltonian, the residual interaction strength parameter in the quasiparticle space has been obtained in such a way that it is self-consistent with the Woods-Saxon form of the shell model potential. As a result of calculations, it has been found that the calculated isospin admixture probability is proportional to a higher power of Z than the results of other theoretical studies.
  • No Thumbnail Available
    Item
    An investigation of the influence of the pairing correlations on the properties of the isobar analog resonances in A=208 nuclei
    Kücükbursa, A; Salamov, DI; Babacan, T; Aygör, HA
    Within the quasi-particle random phase approximation (QRPA), the method of the self-consistent determination of the isovector effective interaction which restores a broken isotopic symmetry for the nuclear part of the Hamiltonian is given. The effect of the pairing correlations between nucleons on the following quantities were investigated for the A = 208 nuclei: energies of the isobar analog 0(+) states, the isospin admixtures in the ground state of the even-even nuclei, and the differential cross-section for the Pb-208(He-3,t)Bi-208 reaction at E(He-3) = 450 MeV. Both couplings of the excitation branches with T-z = T-o +/- 1, and the analog state with isovector monopole resonance (IVMR) in the quasi-particle representation were taken into account in our calculations. As a result of these calculations, it was seen that the pairing correlations between nucleons have no considerable effect on the T = 23 isospin admixture in the ground state of the Pb-208 nucleus, and they cause partially an increase in the isospin impurity of the isobar analog resonance (IAR). It was also established that these correlations have changed the isospin structure of the IAR states, and shifted the energies of the IVMR states to the higher values.
  • No Thumbnail Available
    Item
    The isospin admixture of the ground state and the properties of the isobar analog resonances in medium and heavy mass nuclei
    Salamov, DI; Babacan, T; Kücükbursa, A; Ünlü, S; Maras, I
    Within the framework of quasiparticle random phase approximation (QRPA), Pyatov-Salamov method [23] for the self-consistent determination of the isovector effective interaction strength parameter, restoring a broken isotopic symmetry for the nuclear part of the Hamiltonian, is used. The isospin admixtures in the ground state of the parent nucleus, and the isospin structure of the isobar analog resonance (IAR) state were investigated with the inclusion of the pairing correlations between nucleons for the medium and heavy mass regions: 80 < A < 90, 102 < A < 124, and 204 < A < 214. It was determined that the influence of the pairing interaction between nucleons on the isospin admixtures in the ground state and the isospin structure of the IAR state is more pronounced for the light isotopes (N approximate to Z) of the investigated nuclei.
  • No Thumbnail Available
    Item