Multiphoton mass spectra of XeKr molecules in the range of excited Xe*6p[5/2]2, 3 atoms

Khodorkovskii, M. A.; Belyaeva, A. A.; Rakcheeva, L. P.; Pastor, A. A.; Serdobintsev, P. Yu.; Timofeev, N. A.; Shevkunov, Igor; Hallin, R.; Siegbahn, Kai

doi:10.1134/s0030400x07060069

Cited by 8 publications

(6 citation statements)

References 11 publications

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“…Since there is the previously observed excited state with the same limit and with the = 0 + symmetry, the new excited state can be attributed to this symmetry. Using the obtained wave numbers of bands and their attribution and ascribing the lowest energy with the quantum number v = 0, we can calculate the molecular constants of the observed excited state from (2)(3):…”

Section: Resultsmentioning

confidence: 99%

“…The experimental setup, which has been described previously [2][3][4][5], consists of a supersonic nozzle, an excimer laser pumping, a dye laser, a doubler crystal BBO and a timeof-flight mass spectrometer. Dimer molecules were generated in the supersonic expansion of Xe and Ar mixtures in such a proportion as to ensure the highest concentration of XeAr molecules from high pressure (5 atm) to vacuum (10 −6 Torr) through a 0.1 mm pulse nozzle.…”

Section: Methodsmentioning

confidence: 99%

“…In the present paper we continue a series of studies of excited states of rare gas (RgRg ) diatomic molecules by multiphoton resonance laser ionization [2][3][4][5]. This method allows us to obtain electronic spectra of unstable van der Waals molecules generated in a supersonic molecular beam in the VUV region.…”

Section: Introductionmentioning

confidence: 97%

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Electronic spectra of ArXe molecules in the region of Xe* (6s′, 6p, 5d), 77 000–80 200 cm⁻¹, using resonantly enhanced multiphoton ionization

Khodorkovskii

Murashov

Артамонова

et al. 2010

J. Phys. B: At. Mol. Opt. Phys.

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The excited electronic states of ArXe molecules in the region 77 000–80 200 cm−1 were studied using the (2+1) and (3+1) resonance-enhanced multiphoton ionization methods. The use of different methods of multi-photon excitation and Ar+ ion registration allowed us to obtain some new data. Molecular constants were obtained for previously unknown excited states of molecules with the following dissociation limits: ArXe* → Ar1S0+Xe*6р[5/2]3 with Ω = 2, 3 symmetry; Ar1S0+Xe*6p[3/2]2 with Ω = 1, 2 symmetry; Xe0S1 → Xe*6s′[1/2]01 with Ω = 0+ symmetry.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Electronic spectra of ArXe molecules in the region of Xe* (6s′, 6p, 5d), 77 000–80 200 cm⁻¹, using resonantly enhanced multiphoton ionization

Khodorkovskii

Murashov

Артамонова

et al. 2010

J. Phys. B: At. Mol. Opt. Phys.

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“…The electronically excited states of the heteronuclear rare-gas dimers located close to one of the dissociation limits Rg ′ * + Rg( 1 S 0 ) (Rg, Rg ′ = Ne, Ar, Kr, Xe and Rn), and in particular the C and D states of ArXe and KrXe, are ideal systems for such an investigation. This scientific goal has been pursued in several previous investigations of the low-lying electronic states of KrXe, most notably in studies by VUV absorption and emission spectroscopy [1,2,3,4], resonant multiphoton ionization spectroscopy [5,6,7,8,9,10,11,12,13,14,15] and photoelectron spectroscopy [16,17]. In these studies, the vibrational structure of the electronic spectra could be resolved, insight could be gained into the main properties of the electronically excited states, and the dominant spectral perturbations could be identified.…”

Section: Introductionmentioning

confidence: 99%

High-resolution spectroscopic study of the C 0+ and D 1 Rydberg states of KrXe and of the X 1/2 and A1 3/2 states of KrXe+

Piticco

Merkt

2013

Journal of Molecular Spectroscopy

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The electronic spectrum of the C 0 + , D 1 ← X 0 + transitions of KrXe has been studied at high resolution in the vicinity of the Kr(1 S 0) + Xe 6p[5/2] 2 dissociation limit by resonance-enhanced (1+1 ′) two-photon ionization spectroscopy. The rotational structure of 13 bands, 5 and 8 of which correspond to transitions to levels of 0 + and 1 symmetry, respectively, were observed in the spectra of several isotopomers, and the hyperfine structure in the spectrum of the Ω = 1 levels of 84 Kr 129 Xe was determined. The five transitions to levels of 0 + symmetry form a regular progression of bands characterized by a regular rotational structure and corresponding to high vibrational levels (with v = 16 − 20) of the C 0 + state. The C 0 + state is found to possess significant X 1/2, A 1 3/2 and A 2 1/2 ion-core character in combination with an excited electron of 6pσ, 6pπ and 6sσ character, respectively, and to correlate adiabatically to the Kr(1 S 0) + Xe 6s[1/2] o 1 dissociation limit. The transition to the eight levels of Ω = 1 symmetry form a very irregular progression both as far as spectral positions and intensities are concerned. Rotational levels of f-symmetry, accessed via Q-branch transitions, are weakly predissociated by a repulsive level associated with the Kr(1 S 0) + Xe 6s[1/2] o 0 limit. A local perturbation in the rotational structure of the fourth level of Ω = 1 symmetry enabled the identification of a so far unobserved predissociative level of Ω = 1 or Ω = 2 symmetry with band center near 77318.5 cm −1. The determination of the band centers, rotational constants and isotopic shifts of the Ω = 1 levels led to the conclusion that the level structure is affected by homogeneous perturbations and that at least two electronic states of Ω = 1 symmetry contribute to the spectrum of KrXe in this spectral region. Modelling the observed rovibronic structure using a coupling model involving low vibrational levels of a weakly bound Ω = 1 state associated with the Kr(1 S 0) + Xe 6s[1/2] o 1 dissociation limit and high vibrational levels of a more strongly bound state associated with the Kr(1 S 0) + Xe 6p[5/2] 2 dissociation limit enabled us to reproduce the observed values of the rotational constants, vibronic positions and intensity distribution in a qualitatively satisfactory manner. However, the model failed to account for the observed isotopic shifts. Rotationally resolved photoelectron spectra of the KrXe + X 1/2 ← KrXe C 0 + and KrXe + A 1 3/2 ← KrXe C 0 + ionizing transitions were recorded from selected rotational levels of selected isotopomers of KrXe. The rotational levels of the X 1/2 state of KrXe + group as pairs of levels of opposite parity and have a spin-rotation coupling constant γ of approximately −2B, as a consequence of pure precession. The rotational level structure of the low-lying electronic states of KrXe + thus appear to form the same patterns as the corresponding states of ArXe + .

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“…In this paper we continue a series of studies of the excited states of rare gas (RgRg ) diatomic molecules using multi-photon resonance laser ionization by time-of-flight mass-spectrometer monitoring of ions [1][2][3][4][5]. In this paper the excited electronic states of ArXe were studied using (2 + n) and (3 + n) REMPI methods in the wide high-energy spectral region of 80 300-89 500 cm −1 .…”

Section: Introductionmentioning

confidence: 99%

Electronic spectra of ArXe molecules in the region of Xe* (5d, 7s, 7p, 6p′), 80 300–89 500 cm⁻¹, using resonantly enhanced multiphoton ionization

Khodorkovskii¹,

Murashov²,

Артамонова³

et al. 2010

J. Phys. B: At. Mol. Opt. Phys.

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The electronic spectra of ArXe molecules in the 80 300–89 500 cm−1 region were recorded by (2 + n) and (3 + n) REMPI methods. The vibrational progressions attributed to transitions of molecules from the ground state to the bounded excited state and wide unstructured bands related to transitions to the continuous upper state were obtained. The molecular constants of ArXe* were calculated for all the observed progressions in the 80 300–87 000 cm−1 region as an approximation of an anharmonic oscillator and the Morse potential. For different excited states the energy of harmonic oscillator and the dissociation energy are changed from 10 to 100 cm−1 and from 70 to 750 cm−1, respectively.

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Multiphoton mass spectra of XeKr molecules in the range of excited Xe*6p[5/2]2, 3 atoms

Cited by 8 publications

References 11 publications

Electronic spectra of ArXe molecules in the region of Xe* (6s′, 6p, 5d), 77 000–80 200 cm⁻¹, using resonantly enhanced multiphoton ionization

Electronic spectra of ArXe molecules in the region of Xe* (6s′, 6p, 5d), 77 000–80 200 cm⁻¹, using resonantly enhanced multiphoton ionization

High-resolution spectroscopic study of the C 0+ and D 1 Rydberg states of KrXe and of the X 1/2 and A1 3/2 states of KrXe+

Electronic spectra of ArXe molecules in the region of Xe* (5d, 7s, 7p, 6p′), 80 300–89 500 cm⁻¹, using resonantly enhanced multiphoton ionization

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Multiphoton mass spectra of XeKr molecules in the range of excited Xe*6p[5/2]2, 3 atoms

Cited by 8 publications

References 11 publications

Electronic spectra of ArXe molecules in the region of Xe* (6s′, 6p, 5d), 77 000–80 200 cm−1, using resonantly enhanced multiphoton ionization

Electronic spectra of ArXe molecules in the region of Xe* (6s′, 6p, 5d), 77 000–80 200 cm−1, using resonantly enhanced multiphoton ionization

High-resolution spectroscopic study of the C 0+ and D 1 Rydberg states of KrXe and of the X 1/2 and A1 3/2 states of KrXe+

Electronic spectra of ArXe molecules in the region of Xe* (5d, 7s, 7p, 6p′), 80 300–89 500 cm−1, using resonantly enhanced multiphoton ionization

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Electronic spectra of ArXe molecules in the region of Xe* (6s′, 6p, 5d), 77 000–80 200 cm⁻¹, using resonantly enhanced multiphoton ionization

Electronic spectra of ArXe molecules in the region of Xe* (6s′, 6p, 5d), 77 000–80 200 cm⁻¹, using resonantly enhanced multiphoton ionization

Electronic spectra of ArXe molecules in the region of Xe* (5d, 7s, 7p, 6p′), 80 300–89 500 cm⁻¹, using resonantly enhanced multiphoton ionization