Elastic collision properties of ultracold calcium atoms
Jicai Zhang, Jinfeng Sun, Zunlue Zhu +1 more
The s-wave scattering lengths are obtained for all stable isotope combinations of Ca atoms and those values are very sensitive to small changes of the reduced mass. These results rely on a recent measurement of the 40 Ca– 40 Ca scattering length in a Bose condensate of 40 Ca and making small corrections to a Born–Oppenheimer potential that reproduces all known spectroscopic data. We find that the 42 Ca isotope has a scattering length of 417.5 a 0 and, thus, can be Bose condensed. The large interisotope scattering length between 43 Ca and 42 Ca indicates that sympathetic cooling of 43 Ca by 42 Ca atoms will be effective, and 43 Ca– 42 Ca can also be used to study isotopic Bose–Fermi mixtures. We also predict a d-wave shape resonance for collisions of fermionic 43 Ca atoms in different spin components.
Physica Scripta•Jan 31, 2013•3 citations