Физика Низких Температур: Том 47, Выпуск 6 (Июнь 2021), c. 547-569 ( к оглавлению , назад )
Interatomic interaction within a 4He–4He dimer with mobile nuclei
K. A. Chishko
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine Kharkiv 61103, Ukraine
Received January 22, 2021, published online April 26, 2021
Schrödinger equation for system of two mobile spinless nucleus with Z0 = 2 and four electrons (4He2-dimer) has been solved in the framework of exact diagonalization approach. The spectrum has been obtained with basis of 1134 functions built as direct product of one-particle hydrogen-like functions which are solutions of the exactly solved Sturm–Liouville problem. The asymptotic (Van der Waals) behavior of interaction between two 4He atoms in the limit R0 → ∞ has been analyzed and discussed. The contribution to the interaction energy from four electronic spins on the 4He–4He bond has been calculated the exact diagonalization procedure.
Key words: He–He interatomic interaction, relativistic corrections, spin-spin interaction.