ISSN:
1089-7690
Quelle:
AIP Digital Archive
Thema:
Physik
,
Chemie und Pharmazie
Notizen:
The bond energy of the Zn(4s)+⋅Ar ground-state ion has been determined to be De=2085±100 cm−1 by measuring the threshold for two-color resonant photoionization of a ZnAr metastable state. This bond energy is larger (and the estimated bond length is smaller) than the values for other similar M(ns)+⋅Ar states, where M=Mg, Ca, V, Co, Ba, Cd, and Hg, consistent with our earlier postulate that the Zn(4s)+ "core" is smaller than the other M(ns)+ cores in the analogous electronically excited MAr van der Waals complexes for M=Mg, Ca, Zn, Cd, and Hg. We analyze and compare the M+(ns)⋅Ar potential curves using a model potential consisting of calculated 1/R4 (dipole induction) and 1/R6 (quadrupole induction plus dispersion) attractive terms, and an empirically derived Ae−bR repulsion term. The repulsion term for Zn+Ar is consistent with our postulate, in that at smaller R it is the least repulsive of the M+(ns)⋅Ar repulsive potentials when M=Zn, Hg, V, Co, Cd, Mg, Ca, and Ba. © 1999 American Institute of Physics.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.478534
