Photoionization study of HgAr

摘要

Photoionization efficiency data for HgAr+have been obtained in the region of 680ndash;1240 Aring;. The ionization energy of HgAr was determined to be 10.217plusmn;0.012 eV. This value allows the calculation of the dissociation energy of HgAr+to be 0.228plusmn;0.017 eV. The relative probabilities for the formation of HgAr+via the reactions Arast;thinsp;sdot;thinsp;Hg or Hgast;thinsp;sdot;thinsp;Arrarr; HgAr+thinsp;+eminus;with Arast; and Hgast; prepared in high Rydberg states in the energy range of 10.22ndash;15.79 eV were estimated. Although the radii for the 3dand 5sRydberg ortitals of Ar have similar values, the probabilities for the formation of HgAr+from Hgthinsp;sdot;thinsp;Arast; with Arast; in the 5slsqb;3/2rsqb;01and 5srsquo;lsqb;1/2rsqb;01Rydberg states are substantially greater than those when the Arast; excited atoms are in the 3dlsqb;1/2rsqb;01, 3slsqb;3/2rsqb;01, and 3drsquo;lsqb;3/2rsqb;01Rydberg levels. The ratio for the cross sections for the formation of HgAr+from Hgthinsp;sdot;thinsp;Arast; with Arast; formed in the 3dlsqb;1/2rsqb;01and 4dlsqb;1/2rsqb;01states, as well as that with Arast; prepared in the 5dlsqb;1/2rsqb;01and 6dlsqb;1/2rsqb;01states, were found to be consistent with the predictions of the previous impact parameter calculations.