✍ Scribed by Mark L. Polak; Mary K. Gilles; Robert F. Gunion; W.C. Lineberger
No coin nor oath required. For personal study only.
The 351 nm photoelectron spectrum of PbO-has been recorded with 9 meV resolution. Transitions from the *II,,2 PbOground state anion to the X 'Z+ neutral ground state and three excited states (a I, b O-, and A O+ ) are observed. The adiabatic electron affinity of PbO is determined to be 0.722(6) eV. From a Franck-Condon simulation of the spectrum we obtain r,(PbO-)= 1.995( 15) A, and observation of vibrational hot bands enables measurement of w.(PbO-)=588( ) cm-'. Electronic energies of the excited states are reported, and our results ldentlfy a new excited state while suggesting a corrected term energy for the bO-state.
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