First observation of an identity-forbidden transition in two-photon absorption spectroscopy: I1 - X1+ transition in CO

Bruce A. Garetz, Carter Kittrell

Research output: Contribution to journalArticlepeer-review

Abstract

An identity-forbidden two-photon transition has been observed for the first time, between the I1- and X1+ states in carbon monoxide. Such transitions are dipole allowed only for the absorption of two photons with different frequencies and polarization states. Only P and R rotational branches of the (7-0) band are observed, and the line intensities are maximized for perpendicular photon polarizations. This is the first experimental demonstration of the two-photon electric-dipole selection rule +-.

Original languageEnglish (US)
Pages (from-to)156-158
Number of pages3
JournalPhysical Review Letters
Volume53
Issue number2
DOIs
StatePublished - 1984

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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