Mean lifetimes of five levels in the S band and three levels in the ground-state band of 156Dy, populated via the 124Sn(36S,4n) reaction at E=145MeV, were measured by the Doppler-shift attenuation technique using a line-shape analysis. The differential decay-curve method was applied for a lifetime determination. In contrast with earlier data, the present B(E2) values in the yrast band do not indicate a reduction in the collectivity after the crossing between the S band and the ground-state band, and confirm the results of theoretical calculations using mean-field approaches.
Collectivity at high spins in 156Dy
LUNARDI, SANTO;
2003
Abstract
Mean lifetimes of five levels in the S band and three levels in the ground-state band of 156Dy, populated via the 124Sn(36S,4n) reaction at E=145MeV, were measured by the Doppler-shift attenuation technique using a line-shape analysis. The differential decay-curve method was applied for a lifetime determination. In contrast with earlier data, the present B(E2) values in the yrast band do not indicate a reduction in the collectivity after the crossing between the S band and the ground-state band, and confirm the results of theoretical calculations using mean-field approaches.
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