Two-photon vibronic transitions in crystalline chrysene

The two-photon (TP) absorption spectrum of crystalline chrysene has been measured at 10 K in the wavelength region 370–300 nm. Vibronic transitions to the first excited level L b (B u ) are observed due to b u vibrations of CC stretching character. Evidence of strong crystal field effects on electronic levels is found in our spectrum. Th...More