Sr2CuO2Cl2. signifies a virtually suitable case of the two-D antiferromagnetic CuO2-airplane and therefore is of specific curiosity within the context in the origins of higher TC superconductivity. We now have calculated experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) plus the resonant enhancement of valence photoemissionat the https://okada4dsg.com/