Abstract
The fixed-core stochastic variational method has been used to demonstrate the existence of an electronically stable ground state for potassium positride, KPs, with a binding energy of 0.003 275 Hartree. The 2 annihilation rate of 2.001 × 109 s-1 was almost the same as the annihilation rates computed previously for LiPs and NaPs. Analysis of the radial expectation values, the annihilation rates and the e--e+ correlation function reveal that KPs can be regarded as a Ps cluster moving in the field of the neutral atom.
Original language | English |
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Pages (from-to) | 3839-3848 |
Number of pages | 10 |
Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
Volume | 32 |
Issue number | 15 |
DOIs |
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Publication status | Published - 1999 |