Morse oscillator reduced mass

Fig. 12.4. ln(r/n) plotted versus [m(en - en i)]x 2 for the vibrational predissociation of HeCl2. m is the reduced mass of the van der Waals molecule and en — en i is the energy spacing between adjacent levels of the Morse oscillator. Note that n increases from the right- to the left-hand side Adapted from Cline, Evard, Thommen, and Janda (1986). 

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