In this paper we have extended our previous work ͓de Oliveira et al., Phys. Rev. A 65, 031401 ͑2002͔͒ by measuring the S and D Rydberg lifetimes for 85 Rb for principal quantum number between n = 26 and 31 using a sample of cold Rydberg atoms. This range is limited by the amplitude of the electric field that we can generate in our present setup.
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