Absorption Cross Section and Photoionization Yield of I2between 1050 and 2200 Aring;

摘要

The total absorption cross section and photoionization yield of molecular iodine were measured from 1050 to 2200 Aring;. Two thresholds were observed in the photoionization yield curve. The first was associated with the ionhyphen;pair production Iplus;thinsp;plus;thinsp;Iminus;and the second to direct ionization of I2. From the appearance potential for ionhyphen;pair production and the accurate ionization potential of I2it was possible to calculate the value of the electron affinity of iodine, namely, 3.073thinsp;plusmn;thinsp;0.014 eV.