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Tübingen 2003 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 37: Kernphysik/Spektroskopie V

HK 37.1: Group Report

Thursday, March 20, 2003, 13:30–14:00, A

Spectroscopy of heavy odd and odd-odd nuclei — •Ralf Hertenberger1, Yvonne Eisermann1, Hans-Friedrich Wirth1, Gerhard Graw1, Sandra Christen2, Oliver Möller2, Dimitar Tonev2, Petar Pejovic2, Jan Jolie2, Jose Barea3, Clara E. Alonso3, Pepe Arias3, and Alejandro Frank41Sektion Physik, LMU München — 2IKP, Universität zu Köln — 3FAMN, Universidad de Sevilla — 4Universidad Nacional Autonoma de Mexico

One of the challenges of the spectroscopy of heavy nuclei is to resolve the low lying part of the dense spectra and to study whether the nuclear structure is related to symmetries resulting from a restricted number of degrees of freedom. Particularly interesting are nuclei with a specific bosonic and fermionic structure where dynamical symmetries may relate and predict the spectra of even-even, even-odd, odd-even and odd-odd nuclei. In this way supersymmetry successfully describes a relevant part of the spectra in the quartet of nuclei 194Pt, 195Au, 195Pt and 196Au.
Presently we extend our studies to the neighbouring region: We measured with polarized beam at the Munich Q3D spectrograph angular distributions of the transfer reactions (d,p) to 193Os, 194Ir and 197Pt and (d,α) to 194Ir, 196Au, 200Au and 202Au. Excellent spectra with high counting statistics were obtained with a new detector system and with beam currents of up to 3 µA on target from the Stern-Gerlach polarized ion source.
The determination of excitation energies, spins and parity is discussed, the results are compared with model expectations.
Work supported by the DFG under C4-Gr894/2-3 and by MLL.

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