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Bochum 1998 – wissenschaftliches Programm

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HK: Hadronen und Kerne

HK 16: Spectroscopy: 17 ≤ A ≤ 70

HK 16.7: Vortrag

Montag, 16. März 1998, 18:30–18:45, D

Fast Gamow-Teller Decay of Neutron-Rich Mn Isotopes — •M. Hannawald1, T. Kautzsch1, W. Böhmer1, B. Pfeiffer1, K.-L. Kratz1, W.B. Walters2, A. W"ohr3, V.N. Fedoseyev4, V.I. Mishin4, Y. Jading5, and and the ISOLDE Colaboration51Kernchemie Mainz, Germany — 2University of Maryland, USA — 3KU Leuven, Belgium — 4Russian Acad. of Sciences, Troitzk, Russia — 5CERN, Switzerland

Neutron-rich Mn isotopes up to A=69 have been identified at CERN-ISOLDE using Z-selective laser ionization. Delayed-neutron and γ-ray spectra have been collected. The short half-lives reflect the strong νf5/2 to πf7/2 GT-transitions dominating their β-decay. The 2+-level systematics of the ee-Fe daughters indicates the onset of collectivity already near N=40.  work supported by BMBF (06MZ476) and DFG (436RUS/17/40/97)

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