Slow and Fast High-Spin Sequences in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Er</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>158</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>
P.O. TjømNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720R. M. DiamondNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720J. C. S. BacelarNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720E. M. BeckNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720M. A. DeleplanqueNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720J. E. DraperNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720F. S. StephensNuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
1985lv
ABI
Abstract
Two branches are observed feeding the ${38}^{+}$ level of the yrast line in $^{158}\mathrm{Er}$. Two \ensuremath{\sim}1.2-MeV cascade transitions constitute a fast (\ensuremath{\sim}1 ps) collective component, probably with only minor changes in shape and structure from those at lower spin. Four slower $\ensuremath{\gamma}$ rays (>2 ps) suggest a transition to a different shape and structure, most likely to an oblate ${46}^{+}$ state with all valence particles maximally aligned, a band termination.
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