A simple but elegant spectroscopic technique using two narrow-band dye lasers has been demonstrated for analyzing single-color resonant multi-photon-ionization spectra of atoms. This technique provides a direct identification of the starting level of the multi-photon-ionization pathway. This method can also be used to determine intermediate levels, which play an important role in the ionization process. Some typical results for uranium are presented.
© 1988 Optical Society of America
K. Dasgupta, K. G. Manohar, P. N. Bajaj, B. M. Suri, R. K. Talukdar, P. K. Chakraborti, and P. R. K. Rao, "Understanding single-color multiphoton ionization spectra by pump—probe technique," J. Opt. Soc. Am. B 5, 1257-1260 (1988)