Phys. Rev. A 93, 013424 (2016)
We present absolute-frequency measurements for the transitions from the 6s1/2 ground state of 133Cs to np1/2 and np3/2 Rydberg states. The transition frequencies are determined by one-photon UV spectroscopy in ultracold samples of Cs atoms using a narrowband laser system referenced to a frequency comb. From a global fit of the ionization energy EI and the quantum defects of the two series we determine an improved value of EI = hc · 31406.4677325(14) cm-1 for the ionization energy of Cs with a relative uncertainty of 5·10-11. We also report improved values for the quantum defects of the np1/2, np3/2, ns1/2, and nd5/2 series.
Links:
[1] http://qurope.eu/users/jdeiglmayr
[2] http://journals.aps.org/pra/abstract/10.1103/PhysRevA.93.013424
[3] http://qurope.eu/category/european-commission/h2020
[4] http://qurope.eu/category/projects/rysq
[5] http://qurope.eu/category/attribute/result
[6] http://qurope.eu/category/qics/10-quantum-computation/15-implementations-quantum-optics/1510ry-rydberg-atoms