Experimental and Theoretical Study of Photoionization of Cl III

Photoionization of Cl III ions into IV was studied theoretically using the ab initio relativistic Breit–Pauli R-matrix (BPRM) method and experimentally at Advanced Light Source (ALS) synchrotron Lawrence Berkeley National Laboratory. A relative-ion-yield spectrum measured with a photon energy resolution 10 meV. The theoretical study carried out large wave-function expansion 45 levels configurations 3s23p2, 3s3p3, 3s23p3d, 3s23p4s, 3s3p23d, 3p4. resulting spectra are complex. We have compared observed photoionization cross sections (σPI) ground state 3s23p3(4S3/2o) seven lowest excited 3s23p3(2D5/2o), 3s23p3(2D3/2o), 3s23p3(2P3/2o), 3s23p3(2P1/2o), 3s3p4(4P5/2), 3s3p4(4P3/2) 3s3p4(4P1/2) III, as these can generate resonances within range experiment. were able to identify most belonging various specific initial primary ion beam. Compared first five levels, resonant structures in σPI 3s3p4 appear weaker presence. also produced combined by convolving Gaussian profile experimental width summing them statistical weight factors. features show good agreement III. These expected elucidate recent Sloan Digital Scan Survey project.