Impact of the phonon coupling on the radiative neutron capture |
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| Authors: | A V Avdeenkov S Goriely and S P Kamerdzhiev |
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| Institution: | 1.National Institute for Theoretical Physics,Stellenbosch Institute of Advanced Study,Stellenbosch,South Africa;2.Institute of Nuclear Physics,Moscow State University,Moscow,Russia;3.Institute d’Astronomie et d’Astrophysique,Brussels,Belgium;4.Institute of Physics and Power Engineering,Obninsk,Russia |
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| Abstract: | Inclusion of the coupling of quasiparticle degrees of freedom with phonon degrees is a natural extention of the standard QRPA
approach. The paper presents the quantitative impact of this phonon coupling on the dipole strength and radiative neutron
capture for the stable 124Sn and very exotic 150Sn isotopes, as an illustration, using the self-consistent version of the Extended Theory of Finite Fermi Systems. It was
found that the phonon contribution to the pygmy-dipole resonance and radiative neutron capture cross section is increased
with the (N − Z) difference growth. The results show that the self-consistent nuclear structure calculations are important for unstable nuclei,
where phenomenological approaches do not work. |
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