State what is the vibrational frequency of the molecular ion

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The He I (21.22 eV) photoelectron spectrum of a molecule shows a series of equally spaced sharp peaks corresponding to photoelectron kinetic energies of 12.156, 12.295, 12.434, 12.573, and 12.712 eV. What is the vibrational frequency of the molecular ion (in wavenumbers)?

Reference no: EM13649472

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