Geodesic
Study of the shift of two-phonon poles in deformed nuclei by the method of boson expansions
Teoretičeskaâ i matematičeskaâ fizika, Tome 70 (1987) no. 1, pp. 154-160 
R. V. Jolos; S. P. Ivanova; R. Pedrossa; V. G. Solov'ev. Study of the shift of two-phonon poles in deformed nuclei by the method of boson expansions. Teoretičeskaâ i matematičeskaâ fizika, Tome 70 (1987) no. 1, pp. 154-160. http://geodesic.mathdoc.fr/item/TMF_1987_70_1_a12/
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     author = {R. V. Jolos and S. P. Ivanova and R. Pedrossa and V. G. Solov'ev},
     title = {Study of the shift of two-phonon poles in deformed nuclei by the method of boson expansions},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {154--160},
     year = {1987},
     volume = {70},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_70_1_a12/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

New phonons are constructed by the boson expansion method. The model Hamiltonian is expressed through the new phonon operators up to the fourth order terms. The two-phonon pole shift is calculated. It coincides up to the main terms with that calculated with the RPA phonons and strict inclusion of the Pauli principle. This result confirms the absence of collective two-phonon states in even-even deformed nuclei.

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