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dc.creatorRupper, Patricken_US
dc.creatorMerkt, F.en_US
dc.date.accessioned2006-06-15T20:23:46Z
dc.date.available2006-06-15T20:23:46Z
dc.date.issued2002en_US
dc.identifier2002-RE-06en_US
dc.identifier.urihttp://hdl.handle.net/1811/20479
dc.descriptionAuthor Institution: Physical Chemistry Laboratoryen_US
dc.description.abstractThe $I(1/2u)$, $I(3/2g)$, $I(1/2g)$, $I(3/2u)$ and II(1/2u) states of $Ar^{+}_{2}$ have been investigated in the region between $124650 cm^{-1}$ and $128150 cm^{-1}$ by pulsed-field-ionization zero-kinetic-energy (PFI-ZEKE) photoelectron spectroscopy following $(1 + 1')$ resonance-enhanced two-photon excitation via the $0^{+}_{u}$ Rydberg state located below the $Ar^{\ast} ([3p]^{5}4s'[1/2]_{1}) + Ar (^{1}S_{0})$ dissociation limit of $Ar^{+}_{2}$. By selecting single rotational levels of the intermediate state, the rotational structure of four of the six lowest ionic states of $Ar^{+}_{2}$ could be observed and unambiguous assignments of electronic symmetry of the ionic states could be made on the basis of photoionization selection rules. The rotational structure also provided information on the equilibrium internuclear distances $R^{+}_{e}$ for the $I(1/2u), I(3/2g), I(1/2g)$ and II(1/2u) states $(R^{+}_{e}(I(1/2u)) = (2.393 \pm 0.043) {\AA}, R^{+}_{e} (I(3/2g)) = (2.993 \pm 0.005) {\AA}, R^{+}_{e} (I(1/2g)) = (3.151 \pm 0.002){\AA}$ and $R^{+}_{e} (II(1/2u)) = (3.851 \pm 0.012) {\AA}$). The adiabatic ionization potentials are determined to be $IP(I(3/2g)) = (125685.3 \pm 0.7) cm^{-1}, IP(I(1/2g)) = (126884.1 \pm 0.7) cm^{-1}, IP(I(3/2u)) = (127044.6 \pm 1.5) cm^{-1}$ and $IP(II(1/2u)) = (128000.8 \pm 0.7) cm^{-1}$, from which dissociation energies are obtained as $D^{+}_{0} (I(3/2g)) = (1509.3 \pm 1.2) cm^{-1}, D^{+}_{0}(I(1/2g)) = (310.5 \pm 1.2) cm^{-1}, D^{+}_{0}(I(3/2u)) = (150.0 \pm 1.8) cm^{-1}$ and $D^{+}_{0}(II(1/2u)) = (625.4 \pm 1.2) cm^{-1}$. The interaction between the I(1/2g) and I(3/2g) states could also be observed and analyzed.en_US
dc.format.extent273786 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleROTATIONALLY RESOLVED PHOTOELECTRON SPECTROSCOPY STUDY OF THE FIRST ELECTRONIC STATES OF $Ar^{+}_{2}$en_US
dc.typearticleen_US


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