Bulg. J. Phys. vol.44 no.4 (2017), pp. 443-453

Isovector and Isoscalar Pair Correlations in Boson Representation Technique

G. Nikoghosyan1,2, E.A. Kolganova1,3, R.V. Jolos1,3
1Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna 141980, Russia
2Yerevan State University, Yerevan, Armenia
3Dubna State University, Dubna 141980, Russia
Abstract. The method of the finite boson representation of the bifermion operators is applied to nuclear Hamiltonian with isovector and isoscalar pair interaction. The collective pair addition and pair removal modes are separated from the variety of nuclear degrees of freedom. The collective Hamiltonian for description of dynamics of the pairing modes is constructed and the collective potential energy is analyzed. It is shown that the spin-singlet and spin-triplet pairing can coexist if the system is described by the considered Hamiltonian.

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