Table 3: Equilibrium distance and potential minimum experimental values of Alkali-metal Li, Na, K, Rb, and Cs diatomic systems.

	Li	Na	K	Rb	Cs
Equilibrium distance /(nm)	0.26729 [24]	0.30788 [24]	0.39051 [24]	0.4082 [25, 26]	0.4470 [24]
Potential minimum /(eV)	1.07 [26]	0.774 [26]	0.575 [26]	0.458 [26]	0.420 [26]