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FIZIKA A 7 (1998) 4, 187-192
 
THE EFFECTS OF RETARDED FORCES IN HELIUM DIATOMIC MOLECULES
SREÆKO KILIÆ
Faculty of Natural Science, University of Split, 21000 Split,
Croatia
Received 26 October 1998; revised manuscript received 14 December 1998
Accepted 21 December 1998
The binding energies of helium-3 dimer, helium-4 dimer and 3He - 4He
molecule in the state 1 1S - 1 1S are calculated
using the standard variational procedure. It is shown that the binding energy depends on
the retardation long-range potentials. The expectation value of the internuclear distance
for each complex is also derived.
PACS numbers: 36.90.+f, 31.20.Di
UDC 538.94
Keywords: helium-3 dimer, helium-4 dimer, 3He - 4He
molecule in the state 1 1S - 1 1S, binding
energy, variational procedure, retardation long-range potentials
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