Dresden 2000 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 14: Postersitzung / Theorie

HK 14.35: Poster

Donnerstag, 23. März 2000, 10:15–12:45, B 113

Isospin singlet (pn) pairing and quartetting contribution to the binding energy of nuclei — •A. Schnell¹, G. Röpke¹, P. Schuck², and U. Lombardo³ — ¹U Rostock — ²ISN, Grenoble — ³INFN-LNS, Catania

Isospin singlet (pn) pairing as well as quartetting in nuclei is expected to arise near the symmetry line N=Z. Empirical values can be deduced from the nuclear binding energies applying special filters. Within the local density approximation, theoretical estimates for finite nuclei are obtained from results for the condensation energy of asymmetric nuclear matter. It is shown that the isospin singlet condensation energy drops down abruptly for |N−Z|∼ 4 for medium nuclei in the region A=40. Furthermore, α-like quartetting and the influence of excitations are discussed.