The nonresonant, three-photon ionization spectrum of atomic Xe in the region between the
Xe+ 23/2 and
21/2 fine-structure limits is reported. Using linearly polarized light, four autoionizing Rydberg series are observed converging to the
Xe+ 21/2 limit, corresponding to
(2P\ifmmode^\circ\else\textdegree\fi{}
1/2)ns'[(1/2)]\ifmmode^\circ\else\textdegree\fi{}
1, (2P\ifmmode^\circ\else\textdegree\fi{}
1/2)nd'[(3/2)]\ifmmode^\circ\else\textdegree\fi{}
1,
(2P\ifmmode^\circ\else\textdegree\fi{}
1/2)nd'[(5/2)]\ifmmode^\circ\else\textdegree\fi{}
3, and
(2P\ifmmode^\circ\else\textdegree\fi{}
1/2)ng'[(7/2)]\ifmmode^\circ\else\textdegree\fi{}
3; as expected, using circularly polarized light only the J=3 series are observed. These results are in contrast to earlier experimental work in which no resonant structure was observed. Photoelectron angular distributions are reported for the
(2P\ifmmode^\circ\else\textdegree\fi{}
1/2)9s'[(1/2)]\ifmmode^\circ\else\textdegree\fi{}
1 and the
(2P\ifmmode^\circ\else\textdegree\fi{}
1/2)7d'[(3/2)]\ifmmode^\circ\else\textdegree\fi{}
3 autoionizing resonances. The results are compared with the recent theoretical calculations by P. Gangopadhyay et al. [Phys. Rev. A 34, 2998 (1986)].