Geodesic
Inclusion of neutron-proton phonons in the quasiparticle-phonon nuclear model
Teoretičeskaâ i matematičeskaâ fizika, Tome 57 (1983) no. 3, pp. 438-447 
V. G. Solov'ev. Inclusion of neutron-proton phonons in the quasiparticle-phonon nuclear model. Teoretičeskaâ i matematičeskaâ fizika, Tome 57 (1983) no. 3, pp. 438-447. http://geodesic.mathdoc.fr/item/TMF_1983_57_3_a10/
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     author = {V. G. Solov'ev},
     title = {Inclusion of neutron-proton phonons in the quasiparticle-phonon nuclear model},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     year = {1983},
     volume = {57},
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     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1983_57_3_a10/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

It is shown how operators of neutron-proton phonons can be introduced into the mathematical formalism of the quasiparticle-phonon nuclear model. The Hamiltonian of the model is transformed by means of solutions of the secular equations for the single-phonon states. A system of basic equations is obtained in general form and a transition made to a system of approximate equations. They are intended for the description of the fragmentation of the neutron-proton phonons and thus for the calculation of the characteristics of charge-exchange giant resonances in spherical nuclei.

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