Collectivity Embedded in Complex Spectra: Example of Nuclear Double-Charge Exchange Modes

Details Collectivity Embedded in Complex Spectra: Example of Nuclear Double-Charge Exchange Modes Collectivity Embedded in Complex Spectra: Example of Nuclear Double-Charge Exchange Modes

1997-03-18

arxiv.org/abs/nucl-th/9703039v1

Physics

Nuclear Physics

Nuclear Theory

Latex2e-RevTeX, 4 pages, 4 eps figures uses epsfig.sty

Scientific paper

The mechanism of collectivity coexisting with chaos is investigated on the quantum level. The complex spectra are represented in the basis of two-particle two-hole states describing the nuclear double-charge exchange modes in $^{48}$Ca. An example of $J^{\pi}=0^-$ excitations shows that the residual interaction, which generically implies chaotic behavior, under certain specific and well identified conditions may create transitions stronger than those corresponding to the pure mean-field picture. Therefore, for this type of excitations such an effect is not generic and in most cases the strength of transitions is likely to take much lower values, even close to the Porter-Thomas distributed.

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