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[en] Evaporative cooling was performed to cool fermionic 173Yb atoms in a crossed optical dipole trap. The large elastic collision rate leads to efficient evaporation and we have successfully cooled the atoms to 0.37±0.06 of the Fermi temperature, that is to say, to a quantum degenerate regime. In this regime, a plunge of evaporation efficiency was observed as a result of Fermi degeneracy
[en] Electromagnetically induced transparency in a multilevel system is investigated in 173Yb. The level structure investigated is ''open'' in that the light that gives rise to the transparency also resonantly couples the atoms to excited states which do not exhibit electromagnetically induced transparency. The resulting reduction of transparency is investigated experimentally and theoretically. It is found that, while the transparency is poor in certain regimes, it can be made to perform arbitrarily well in the limit of a large intensity imbalance between the optical fields.
[en] To benchmark the validity of using the (d,pγ) reaction as a surrogate for (n,γ), the 171,173Yb(d,pγ) reactions were measured with the goal to reproduce the known neutron capture cross section ratio of these nuclei. Preliminary surrogate results reproduced the measured values within 15%.
[en] The hfs of the 61P1 state of 173Yb has been investigated by level-crossing and anticrossing spectroscopy. From an optimal fit of experimental and calculated signal curves the authors obtain the hfs coupling constants: A = 58.45(80) MHz, B = 589.6(13.0) MHz. (Auth.)
[en] Excited-state energies and E2 transition probabilities have been calculated for the four well-deformed nuclei considered in the recent work of R. V. Jolos and P. von Brentano, using the three mass parameters proposed in their work, while also taking into account the interplay of rotational and vibrational modes. The Davidson potential is used as a potential of the β vibration. The same approach is applied to the odd 173Yb nucleus.
[en] The hyperfine structure splitting in the excited 4f146s6d states of 171Yb and 173Yb have been measured. Isotope selection was achieved by stepwise laser excitation of the 1D2 and 3Dsub(2,1) states. The 3D3 state of 171Yb was excited via collisional excitation of an intermediate level. The magnetic and electric hfs coupling constants are given and compared to ab initio values calculated from relativistic self-consistent-field wavefuctions. (orig.)