TY - JOUR
T1 - Photodissociation spectroscopy of the chromium trimer ion
AU - Majima, T.
AU - Tono, K.
AU - Terasaki, A.
AU - Kawazoe, Y.
AU - Kondow, T.
PY - 2007/7/1
Y1 - 2007/7/1
N2 - 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.
AB - 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.
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U2 - 10.1140/epjd/e2007-00061-5
DO - 10.1140/epjd/e2007-00061-5
M3 - Article
AN - SCOPUS:34249668764
VL - 43
SP - 23
EP - 26
JO - European Physical Journal D
JF - European Physical Journal D
SN - 1434-6060
IS - 1-3
ER -