A BEAM-FOIL STUDY OF THE 3S3P3D 4F LEVELS IN THE AL-LIKE IONS OF TI, FE AND NI

The decays of the high angular momentum, high spin F-4(0) states of th e electron configuration 3s3p3d in aluminium-like ions (with three ele ctrons outside a closed shell) have been identified in delayed spectra of foil excited Ti, Fe and Ni ion beams. The line identifications wer e aided by HXR, MCHF, and MCDF calculations and are corroborated by li fetime measurements which demonstrate the differential longevity of th e fine structure levels. A search for the related case of 1s2p3dF-4(0) level decays in Li-like ions of Si, P and S failed.