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

M. Tohyama·A. S. Umar
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Abstract

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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M. Tohyama, A. S. Umar. 2002-09-10. Quadrupole resonances in unstable oxygen isotopes in time-dependent density-matrix formalism. https://doi.org/10.1016/s0370-2693(02)02885-x

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