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The violated commutation condition between the total shell model Hamiltonian and Gamow-Teller operator (GT) has been restored
by Pyatov method (PM). The considered nuclear model Hamiltonian in PM includes the separable GT residual interaction in ph
and pp channels and is differentiated from the traditional schematic model by h
0(restoration term). The influence of the h
0 effective interaction on the 2νββ decay of 48Ca, 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128,130Te and 136Xe is investigated. All the calculations have been done within the framework of standard QRPA. The results obtained by PM
are compared with those of other approaches and experimental data. The influence of the restoration term on the stability
of the 2νββ decay nuclear matrix elements is analysed.
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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 theA = 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 the208Pb(3He,t)208Bi reaction atE(3He)=450 MeV. Both couplings of the excitation branches withT
z = T0 ± 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 theT = 23 isospin admixture in the ground state of the208Pb 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. 相似文献
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Cellulose - Wood modification treatments by substitution or blocking of wood hydroxyl groups with hydrophobic molecules are some of the novel approaches that may improve dimensional stability,... 相似文献
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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 ≈ Z) of the investigated nuclei 相似文献
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