Chemical shifts of L3 X-ray absorption edges on lead and thallium compounds by DEXAFS using synchrotron radiation source

Abstract

The L3 absorption edges of 82Pb and 81Tl compounds have been measured using DEXAFS at INDUS-2 Synchrotron radiation source at RRCAT, Indore. The energy shift of ∼(−6 to 2) eV are observed in pre-edge of 82Pb compounds while energy shift varies ∼(−5 to 10) eV in pre-edge and ∼(2–9) eV in post-edge of 81Tl compounds. The chemical effects in both compounds have been described by calculating effective charge using Suchet and Pauling methods. A linear relation is established between chemical effect and effective charge of different compounds for the first time in literature.