V = h c D e [ 1 − e − a ( R − R e ) ] 2 {\displaystyle V=hcD_{e}[1-e^{-a(R-R_{e})}]^{2}} mit a = m e f f ω 2 2 h c D e {\displaystyle a={\sqrt {\frac {m_{eff}\omega ^{2}}{2hcD_{e}}}}}