https://scholarsmine.mst.edu/doctoral_dissertations/293/
"Cross sections for photoionization of the 6²P-fine structure levels of" by John Daniel Jones
"The cross sections for photoionization of excited cesium from the 62P3/2- and 6²P1/2-fine structure levels have been measured using a triple crossed-beam...
john daniel jonescross sectionsof thefine structurephotoionization