Electron Affinities in the Periodic Table and an Example for As
Based on our previous analysis of elec-tron affinities of atoms and structures of atomic negative ions[J.Phys.Chem.Ref.Data 51,021502(2022)],this re-view provides a concise presentation of the electron affinities of atoms.We briefly describe and compare three com-monly used experimental methods for determining electron affinities to highlight their respective advantages and disadvantages.To illustrate the features of the slow electron velocity-map imaging method utilized in our cur-rent study,we conducted measurements on the electron affinity of As and excited states of its anion.The electron affinity of As was determined to be 6488.61(5)cm-1 or 0.804485(6)eV.The fine structures of As-were well resolved,with values of 1029.94(18)cm-1 or 0.12770(3)eV for 3P1 and 1343.04(55)cm-1 or 0.16652(7)eV for 3P0 above the ground state 3P2,respectively.
万方数据
维普
