Photodissociation spectroscopy of the chromium trimer ion

T. Majima, K. Tono, A. Terasaki, Y. Kawazoe, T. Kondow

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2 Citations (Scopus)

Abstract

The electronic and geometric structures and photodissociation dynamics of the chromium trimer ion, Cr3 +, were investigated by photodissociation spectroscopy in the photon-energy range from 1.32 to 5.52 eV. The branching fractions of the product ions, Cr+ and Cr2 +, exhibit stepwise changes at the threshold energies for dissociation into Cr++Cr2, Cr+Cr2 +, Cr++2Cr, and Cr*+Cr2 +. It is noted that Cr2 + is produced even above the threshold for atomization; the excess energy is redistributed to produce a fragment atom, Cr*, in an excited state. The photodissociation action spectrum is well explained by a mixture of simulated spectra for two nearly-degenerate structural isomers identified by density functional calculations: those having a metastable C2v structure and the most stable structure slightly distorted from the C2v one. The barrier height between the two isomers which is lower than the zero-point energy suggests that Cr3 + has an intrinsically floppy structure.

Original languageEnglish
Pages (from-to)23-26
Number of pages4
JournalEuropean Physical Journal D
Volume43
Issue number1-3
DOIs
Publication statusPublished - 2007 Jul 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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