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HK: Physik der Hadronen und Kerne

HK 42: Nuclear and Particle Astrophysics III

HK 42.7: Vortrag

Donnerstag, 11. März 2004, 15:30–15:45, F

Octupole correlations in the N 88 region — •M. Babilon^1,2, N. V. Zamfir¹, R. F. Casten¹, E. A. Ricard-McCutchan¹, D. Kusnezov¹, W. Bayer², D. Galaviz², and A. Zilges² — ¹Yale University — ²Technische Universitaet Darmstadt

An extensive study of the negative parity states in the even-even nuclei in the Z 56-64, N 88 region was performed in the framework of the Interacting Boson Approximation (IBA) model. This region was predicted to present strong octupole correlations and, by incorporating the p and f bosons in the usual IBA-sd model, the character of the octupole excitations was studied. The predictions for the negative parity states were extensively compared with the existing data. More experimental information is needed to understand the octupole collectivity in these nuclei. To obtain such information negative parity states in ¹⁵²Gd were populated via β-decay and studied via off-beam coincidence γ-ray spectroscopy at the Moving Tape Collector of the Wright Nuclear Structure Lab (Yale University). A comparison between the experimental results and spdf-IBA calculations will be given. This work was supported by the U.S. DOE Grant No. DE-FG02-91ER-40609.