München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 18: Theorie

HK 18.5: Vortrag

Dienstag, 21. März 2006, 15:00–15:15, B

Nuclear response beyond the RPA approach — •Carlo Barbieri — GSI, Theory Department

Giant resonances are a source of information about the properties of nucleonic matter. Understanding these modes towards the drip lines will allow improved predictions in case of N/Z asymmetry and for low energy interaction with neutrinos. This talk reports about recent theoretical developments in this directions.

We use self-consistent Green’s function (SCGF) theory and a Faddeev expansion to properly reproduce the distribution of single particle strength. The latter can have sizable impact on the behavior of the nuclear response, already at the 1p-1h level. The so obtained quasi-particles and -holes are used as a staring point in dressed RPA (DRPA) and in interacting phonons calculations. This approach is microscopic and based on realistic NN interactions.

Pilot work has been done for isotopes along the stability line, while the extension toward the drip lines is already in progress and will also be discussed.