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Phys" Rev. BJL4, 4808 (1976). 14 M 9 Cross, Phys. Rev. B jj5, 602 (1977). 15 ln Refo 5 there is an indication of the third peak but of a fractional intensity -2x 10" 3 0 The authors attribute it to possible pre-target molecular dissociation.We report the observation of doubly excited autoionizing Rydberg states of Sr, belonging to the configuration 5p 1 / 2 ,nh Gur procedure involves a three-step optical excitation process which incorporates Stark switching to reach higher I states not normally accessible because of dipole selection rules. Quantum defects are reported for several 5/> 1 / 2 , ns and 5pi/ 2 9 nd states. The lifetimes of the 5p 1^29 ns states are shown to scale as (n*) 3 , and the lifetimes of the 5p l / 2f 16/ states are shown to increase dramatically with increasing I

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