Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 16: Spectroscopy: 17 ≤ A ≤ 70

HK 16.5: Talk

Monday, March 16, 1998, 18:00–18:15, D

Beta–Decay of ⁵⁶Cu — •W. Liu¹, J. Äystö², P. Baumann³, B.A. Brown⁴, P. Dendooven², Y. Fujita⁵, M. Górska¹, H. Grawe¹, Z. Hu¹, Z. Janas⁶, A. Jokinen², R. Kirchner¹, O. Klepper¹, A. Knipper³, M. Oinonen², H. Pentilä², A. Płochocki⁶, M. Ramdhane³, E. Roeckl¹, and G. Walter³ — ¹GSI, D-64291 Darmstadt — ²University of Jyväskylä, FIN–40351, Finland — ³Institut de Recherches Subatomiques, F–67037 Strasbourg, France — ⁴Michigan State University, East Lansing, Michigan 48824, USA — ⁵Osaka University, Osaka 560, Japan — ⁶Institute of Experimental Physics, University of Warsaw, Poland

The β–decay of ⁵⁶Cu to the doubly magic nucleus ⁵⁶Ni was studied. ⁵⁶Cu was produced by ²⁸Si(³²S, p3n) fusion–evaporation reactions at the GSI online mass separator. This decay, characterised by an unusually high Q_EC value of 15300(140) keV, is expected to make a major part of the allowed β–decay strength accessible to experiment. For the first time, the half–life of ⁵⁶Cu was measured, and a decay scheme was deduced from the four observed β–delayed γ lines. The experimental results are compared with shell–model predictions.