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Itisknownthatsmallsodiumclustermaybehaveasrigidmolecul(lsandpresentdefinedvibrationalspectraforlowtemperature.ForNa4,ther(’aresixeigenvibrationalmodesasdisplayedinFig.1.Itisinterestingtodeterminefi.cquenciesofsundryeigen-modesfromdynamoicspointofview.dlld
Itisknownthatsmallsodiumclustermaybehaveasrigidmolecul (lsandpresentdefinedvibrationalspectraforlowtemperature.ForNa4, ther (’aresixeigenvibrationalmodesasdisplayedinFig.1.Itisinterestingtodeterminefi.cquenciesofsundryeigen-modesfromynamoicspointofview.dlld