Microscopic Description of Isoscalar Giant Monopole Resonance in 48Ca
Abstract
The properties of the isoscalar giant monopole resonance (ISGMR) for the double magic 48Ca are analyzed in the framework of a microscopic model based on Skyrme-type interactions. A method for simultaneously taking into account the coupling between one-, two-, and three-phonon terms in the wave functions of 0+ states has been developed. The inclusion of three-phonon configurations leads to a substantial redistribution of the ISGMR strength to lower energy 0+ states and also higher energy tail. Our results demonstrate that the developed approach enables to us to describe a gross structure of the ISGMR spreading width.
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