Energy level structure and potential energy curve of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si28.gif" display="inline" overflow="scroll"><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:mspace width="0.35em" /><mml:msubsup><mml:mrow><mml:mn>0</mml:mn></mml:mrow><mml:mrow><mml:mi mathvariant="normal">u</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math> state of Ne2 by high-resolution VUV laser spectroscopy

Wüest, Andrea; Merkt, F.

doi:10.1016/j.cplett.2004.08.087

Cited by 4 publications

(4 citation statements)

References 29 publications

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“…12,13 The knowledge of their potential-energy functions and spectroscopic properties is also relevant to understanding the electronic spectrum of the neutral rare-gas dimers. [14][15][16][17] Indeed, all electronically excited states of the rare-gas dimers have Rydberg character and may be regarded, in first approximation, as a rare-gas dimer ion weakly interacting with a Rydberg electron.…”

Section: Introductionmentioning

confidence: 99%

Rotationally resolved PFI-ZEKE photoelectron spectroscopic study of the low-lying electronic states of ArXe+

Piticco

Merkt

2012

The Journal of Chemical Physics

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Rotationally resolved pulsed-field-ionization zero-kinetic-energy photoelectron spectra of the X 1/2, A(1) 3/2, and A(2) 1/2 electronic states of the ArXe(+) molecular ion have been recorded following resonant (1+1') two-photon excitation via selected rovibrational levels of the C 1 and D 0(+) states of selected isotopomers of the ArXe molecule. Using rovibronic selection and propensity rules for the photoionization out of these intermediate molecular states enabled the determination of the parity of the molecular-ion levels and of the magnitude and sign of the Ω-doubling constants of the coupled X 1/2 (p ≈ 4B) and A(2) 1/2 (p ≈ -2B) states of ArXe(+). The results indicate that these molecular-ion states can be approximately described using Mulliken's second variant of Hund's angular momentum coupling case (c), for which J(a), the total electronic and spin angular momentum of the two atoms, is a good quantum number (semi-united atom). The analysis of the rotational structure enabled the derivation of improved values of the dissociation energies, equilibrium distances, and molecular constants for the X 1/2, A(1) 3/2, and A(2) 1/2 states of ArXe(+).

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Section: Introductionmentioning

confidence: 99%

Rotationally resolved PFI-ZEKE photoelectron spectroscopic study of the low-lying electronic states of ArXe+

Piticco

Merkt

2012

The Journal of Chemical Physics

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“…The vibrational energy levels and corresponding rotational constants were determined numerically from these adiabatic potentialenergy functions following the procedure described in Ref. 13.…”

Section: Perturbation Of the Vibrational Structure And Potential Modementioning

confidence: 99%

“…Such potential barriers are characteristic features of many excited electronic states of the rare-gas dimers. 8,[12][13][14][15] Although the potential-energy function of the lower adiabatic = 1 state in Fig. 8(b) should provide an accurate description of the C 1 state in the range of internuclear distances between 3 and 4.5 Å, where high-resolution spectroscopic data are available, it remains uncertain outside this range.…”

Section: Perturbation Of the Vibrational Structure And Potential Modementioning

confidence: 99%

“…Configurational mixing and spectral perturbations are extensive in the electronically excited states, and many states are predissociative and/or have potential-energy functions with multiple minima. 8,10,[12][13][14][15] Despite considerable progress in studies of the electronic structure and dynamics of rare-gas dimers since the first measurements of their vacuum ultraviolet electronic spectra, [16][17][18][19][20][21][22][23] the understanding of most band systems remains incomplete. Available predictions of the properties of electronically excited states by ab initio quantum chemistry [24][25][26][27] are not accurate enough to enable unambiguous spectral assignments.…”

Section: Introductionmentioning

confidence: 99%

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Structure and dynamics of the electronically excited C 1 and D 0+ states of ArXe from high-resolution vacuum ultraviolet spectra

Piticco

Schäfer

Merkt

2012

The Journal of Chemical Physics

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Vacuum ultraviolet spectra of the C 1 ← X 0(+) and D 0(+) ← X 0(+) band systems of ArXe have been recorded at high resolution. Analysis of the rotational structure of the spectra of several isotopomers, and in the case of Ar(129)Xe and Ar(131)Xe also of the hyperfine structure, has led to the derivation of a complete set of spectroscopic parameters for the C 1 and D 0(+) states. The rovibrational energy level structure of the C 1 state reveals strong homogeneous perturbations with neighboring Ω = 1 electronic states. The analysis of isotopic shifts led to a reassignment of the vibrational structure of the C 1 state. The observation of electronically excited Xe fragments following excitation to the C state rotational levels of f parity indicates that the C state is predissociated by the electronic state of 0(-) symmetry associated with the Ar((1)S(0)) + Xe(6s(')[1/2](0) (o)) dissociation limit. The observed predissociation dynamics differ both qualitatively and quantitatively from the behavior reported in previous investigations. An adiabatic two-state coupling model has been derived which accounts for the irregularities observed in the rovibronic and hyperfine level structure of the C 1 state. The model predicts the existence of a second state of Ω = 1 symmetry, supporting several tunneling/predissociation resonances located ~200 cm(-1) above the C 1 state.

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Applications of genetic algorithms for inverting positron lifetime spectrum

Lemes

Braga

Belchior

2005

Chemical Physics Letters

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Energy level structure and potential energy curve of the C0u+ state of Ne2 by high-resolution VUV laser spectroscopy

Cited by 4 publications

References 29 publications

Rotationally resolved PFI-ZEKE photoelectron spectroscopic study of the low-lying electronic states of ArXe+

Rotationally resolved PFI-ZEKE photoelectron spectroscopic study of the low-lying electronic states of ArXe+

Structure and dynamics of the electronically excited C 1 and D 0+ states of ArXe from high-resolution vacuum ultraviolet spectra

Applications of genetic algorithms for inverting positron lifetime spectrum

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