Author/Authors :
G. Benzoni، نويسنده , , A. Bracco، نويسنده , , F. Camera، نويسنده , , S. Leoni، نويسنده , , B. Million، نويسنده , , A. Maj، نويسنده , , A. Algora، نويسنده , , A. Axelsson، نويسنده , , M. Bergstr?m، نويسنده , , N. Blasi، نويسنده , , M. Castoldi، نويسنده , , S. Frattini، نويسنده , , A. Gadea، نويسنده , , B. Herskind، نويسنده , , M. Kmiecik ، نويسنده , , G. Lo Bianco، نويسنده , , J. Nyberg، نويسنده , , C. Rossi-Alvarez and M. Pignanelli، نويسنده , , J. Styczen، نويسنده , , O. Wieland، نويسنده , , et al.، نويسنده ,
Abstract :
Spectra of the yrast and excited superdeformed bands, forming the E2 quasi-continuum, are measured with the EUROBALL array for the nucleus 143Eu, in coincidence with high-energy γ-rays (Eγ>3 MeV). It is found that the intensity population of the superdeformed states is enhanced by a factor of ≈1.6 when a coincidence with a γ-ray with energy >6 MeV is required, in reasonable agreement with the increase of the line shape of the Giant Dipole Resonance built on a superdeformed configuration. This result shows that when an high energy E1 γ-ray is involved in the decay it is more likely connected with a SD rather than a ND nucleus. In addition, the analysis of the rotational quasi-continuum suggests the presence of a superdeformed component. The data are also compared and found consistent with simulation calculations of the relative intensities of the SD states, including the E1 decay of superdeformed nature.
