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The magnesium argide ion,MgAr+ is an ion composed of one ionised magnesium atom,Mg+ and an argon atom. It is important in inductively coupled plasma mass spectrometry and in the study of the field around the magnesium ion. The ionization potential of magnesium is lower than the first excitation state of argon,so the positive charge in MgAr+ will reside on the magnesium atom. Neutral MgAr molecules can also exist in an excited state.
Diargon or the argon dimer is a molecule containing two argon atoms. Normally,this is only very weakly bound together by van der Waals forces. However,in an excited state,or ionised state,the two atoms can be more tightly bound together,with significant spectral features. At cryogenic temperatures,argon gas can have a few percent of diargon molecules.
References
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- ↑ "KWONG-TIN (K.T.) TANG - Pacific Lutheran University".
- 1 2 "APS Fellow Archive".
- ↑ "Kwong-Tin Tang - Alibris".
- ↑ "Kwong-tin Tang - ResearchGate".
- ↑ Tang, K. T.; Toennies, J. Peter (1986). "New combining rules for well parameters and shapes of the van der Waals potential of mixed rare gas systems". Zeitschrift für Physik D. 1: 91–101. doi:10.1007/BF01384663. S2CID 122224768.
- ↑ Ahlrichs, R.; Böhm, H. J.; Brode, S.; Tang, K. T.; Toennies, J. Peter (1988). "Interaction potentials for alkali ion–rare gas and halogen ion–rare gas systems". The Journal of Chemical Physics. 88 (10): 6290–6302. doi:10.1063/1.454467.
- ↑ Tang, K. T.; Toennies, J. Peter (1978). "A simple theoretical model for the van der Waals potential at intermediate distances. II. Anisotropic potentials of He–H2 and Ne–H2". The Journal of Chemical Physics. 68 (12): 5501–5517. doi:10.1063/1.435678.
- ↑ Bowers, M. S.; Tang, K. T.; Toennies, J. Peter (1988). "The anisotropic potentials of He–N2, Ne–N2, and Ar–N2". The Journal of Chemical Physics. 88 (9): 5465–5474. doi:10.1063/1.454557.
- ↑ "Potentials for some rare gas and alkali-helium systems calculated from the surface integral method".
- ↑ Patil, S. H.; Tang, K. T. (1997). "Multipolar polarizabilities and two- and three-body dispersion coefficients for alkali isoelectronic sequences". The Journal of Chemical Physics. 106 (6): 2298–2305. doi:10.1063/1.473089.
- ↑ Tang, K. T. (1969). "Dynamic Polarizabilities and van der Waals Coefficients". Physical Review. 177: 108–114. doi:10.1103/PhysRev.177.108.
- ↑ Hirschfelder, Joseph O.; Tang, K. T. (1976). "Quantum mechanical streamlines. III. Idealized reactive atom–diatomic molecule collision". The Journal of Chemical Physics. 64 (2): 760–785. doi: 10.1063/1.432223 .
- ↑ Tang, K. T.; Karplus, M. (1971). "Quantum Theory of (H,H2) Scattering: Approximate Treatments of Reactive Scattering". Physical Review A. 4 (5): 1844–1858. doi:10.1103/PhysRevA.4.1844.
- ↑ Choi, B. H.; Tang, K. T. (1975). "Inelastic collisions between an atom and a diatomic molecule. I. Theoretical and numerical considerations for the close coupling approximation". The Journal of Chemical Physics. 63 (5): 1775–1782. doi: 10.1063/1.431574 .
- ↑ "1992 1993 v 23 no 1 4".