Quadrupole resonances in unstable oxygen isotopes in time-dependent density-matrix formalism

Details Quadrupole resonances in unstable oxygen isotopes in time-dependent density-matrix formalism Quadrupole resonances in unstable oxygen isotopes in time-dependent density-matrix formalism

2002-06-28

arxiv.org/abs/nucl-th/0206069v2

Phys.Lett. B549 (2002) 72-78

Physics

Nuclear Physics

Nuclear Theory

6 pages, 6 figures

Scientific paper

10.1016/S0370-2693(02)02885-X

The strength functions of quadrupole modes in the unstable oxygen isotopes 22O and 24O are calculated using an extended version of the time-dependent Hartree-Fock theory known as the time-dependent density-matrix theory (TDDM). It is found that TDDM gives the lowest quadrupole states which are energetically shifted upward and become significantly collective due to the coupling to two-body configurations. It is pointed out that these features of the lowest quadrupole states are similar to those obtained in the quasi-particle random phase approximation.

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