The review describes how SSRPA fixes SRPA pathologies in EDF theory, presents applications to charge-conserving and charge-exchange excitations with experimental comparisons, and discusses impacts on the nuclear equation of state.
Double-Dipole Excitations in 40Ca
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abstract
The double-dipole strength distribution in $^{40}$Ca is calculated microscopically within a model space of 1p1h - and 2p2h excitations. Anharmonic effects in the centroid energies of the $0^+$- and $2^+$ components are found to be small, in agreement with experimental observation. Firm conclusions about the spreading width cannot be drawn, as yet, due to computational limitations in the number of 2p2h states.
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Recent applications of the subtracted second RPA method
The review describes how SSRPA fixes SRPA pathologies in EDF theory, presents applications to charge-conserving and charge-exchange excitations with experimental comparisons, and discusses impacts on the nuclear equation of state.