Positron binding to alkali-metal hydrides: The role of molecular vibrations

Journal Article · Wed Feb 15 00:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.022705· OSTI ID:20974576

Gianturco, Franco A; Franz, Jan; Buenker, Robert J; Liebermann, Heinz-Peter; Pichl, Lukas; Rost, Jan-Michael; Tachikawa, Masanori; Kimura, Mineo ^[1]

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1. Department of Chemistry and INFM, University of Rome La Sapienza, Piazzale A. Moro 5, 00185 Rome (Italy)

The bound vibrational levels for J=0 have been computed for the series of alkali-metal hydride molecules from LiH to RbH, including NaH and KH. For all four molecules the corresponding potential-energy curves have been obtained for each isolated species and for its positron-bound complex (e{sup +}XH). It is found that the calculated positron affinity values strongly depend on the molecular vibrational state for which they are obtained and invariably increase as the molecular vibrational energy content increases. The consequences of our findings on the likelihood of possibly detecting such weakly bound species are briefly discussed.

• OSTI ID: 20974576
• Journal Information: Physical Review. A, Vol. 73, Issue 2; Other Information: DOI: 10.1103/PhysRevA.73.022705; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
BINDING ENERGY
CHEMICAL BONDS
LITHIUM HYDRIDES
MOLECULES
POSITRON-MOLECULE COLLISIONS
POSITRONS
POTASSIUM COMPOUNDS
POTENTIAL ENERGY
RUBIDIUM COMPOUNDS
SODIUM HYDRIDES
VIBRATIONAL STATES