Evidence for the Jacobi shape transition in hot 46Ti
A. Maj, M. Kmiecik, A. Bracco, F. Camera, P. Bednarczyk, B. Herskind, S. Brambilla, G. Benzoni, M. Brekiesz, D. Curien, G. DeAngelis, E. Farnea, J. Grebosz, M. Kicinska-Habior, S. Leoni, W. Meczynski, B. Million, D. R. Napoli, J. Nyberg, C. M. Petrache, J. Styczen, O. Wieland, M. Zieblinski, K. Zuber, N. Dubray, J. Dudek, K. Pomorski
Abstract
The gamma-rays from the decay of the GDR in 46Ti compound nucleus formed in the 18O+28Si reaction at bombarding energy 105 MeV have been measured in an experiment using a setup consisting of the combined EUROBALL IV, HECTOR and EUCLIDES arrays. A comparison of the extracted GDR lineshape data with the predictions of the thermal shape fluctuation model shows evidence for the Jacobi shape transition in hot 46Ti. In addition to the previously found broad structure in the GDR lineshape region at 18-27 MeV caused by large deformations, the presence of a low energy component (around 10 MeV), due to the Coriolis splitting in prolate well deformed shape, has been identified for the first time.
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