Frequency and Alignment Classification of Multiple Band Crossings
L. L. RiedingerThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkOle AndersenThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkS. FrauendorfThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkJ.D. GarrettThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkJ. J. GaardhøjeThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkG.B. HagemannThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkB. HerskindThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkY. V. MakovetzkyThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkJ. C. WaddingtonThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkM. GuttormsenThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkP.O. TjømThe Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
1980en
ABI
Аннотация
Experiments on $^{160}\mathrm{Yb}$ indicate three negative-parity bands up to $I>~21\ensuremath{\hbar}$. All three experience a band crossing around a frequency $\ensuremath{\hbar}\ensuremath{\omega}=0.36$ MeV, a value intermediate to those of the first and second yrast backbends. The ${i}_{\frac{13}{2}}$ band in $^{161}\mathrm{Yb}$ is observed up to ${\frac{49}{2}}^{+}$; it also has a strong upbend at this intermediate frequency. The fingerprint of a band crossing based upon the crossing frequency and gain in aligned angular momentum is demonstrated and the results compared to cranking-model calculations to suggest quasiparticle assignments for the bands.
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