The NaHg red bands revisited

Gruber, Dieter; Domiaty, Ursula; Li, X.; Windholz, Laurentius; Gleichmann, M.; Heß, Bernd A.

doi:10.1063/1.469242

Cited by 13 publications

(13 citation statements)

References 24 publications

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“…As a result the absorption and emission spectra reveal not only atomic line broadening but also very broad, essentially molecular features with rich rotational-vibrational structure and satellite peaks due to formation of molecules and quasi-molecules. Since pioneering work by Hedges et al [1], such spectra have been a subject of extensive studies, both theoretical and experimental, and proved to be a rich source of information about the interaction potentials, collision dynamics and transition dipole moments [2][3][4][5][6][7][8][9][10][11][12]. The experimental approaches employed include absorption measurements [4,5,8,9,12], laser-induced fluorescence [3,6,9] and thermal emission spectra [7].…”

Section: Introductionmentioning

confidence: 99%

Precision measurements of sodium-sodium and sodium-noble gas molecular absorption

Shurgalin

Parkinson

Yoshino

et al. 2000

Meas. Sci. Technol.

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Abstract.Experimental apparatus and measurement technique are described for precision absorption measurements in sodium -noble gas mixtures. The absolute absorption coefficient is measured in the wavelength range from 425 nm to 760 nm with ±2% uncertainty and spectral resolution of 0.02 nm. The precision is achieved by using a specially designed absorption cell with an accurately defined absorption path length, low noise CCD detector and double-beam absorption measurement scheme. The experimental set-up and the cell design details are given. Measurements of sodium atomic number density with ±5% uncertainty complement absorption coefficient measurements and allow derivation of the reduced absorption coefficients for certain spectral features. The sodium atomic number density is measured using the anomalous dispersion method. The accuracy of this method is improved by employing a least-squares fit to the interference image recorded with CCD detector and the details of this technique are given. The measurements are 1 aimed at stringent testing of theoretical calculations and improving the values of molecular parameters used in calculations.

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Section: Introductionmentioning

confidence: 99%

Precision measurements of sodium-sodium and sodium-noble gas molecular absorption

Shurgalin

Parkinson

Yoshino

et al. 2000

Meas. Sci. Technol.

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“…According to the reaction sequence and we obtain the spectrum shown in Figure a. Besides the NaHg(II 1/2 − X 1/2 ) red bands in the wavelength range 600−680 nm, we observe a fraction according to the Na 2 (A 1 − X 1 ) transition, observable from 690 nm on and extending toward higher wavelengths. The population of the Na 2 (A 1 ) state is due to collision-induced radiationless relaxations of the initially populated B( 1 Π u ) state .…”

Section: Resultsmentioning

confidence: 86%

Production Rates of Photochemical Reactions by Pulsed Laser Excitation on the Example of the NaHg Molecule

Gruber

1997

J. Phys. Chem. A

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We report on the determination of the reaction rate of photochemical reactions in the gas phase, taking NaHg as an example. The lifetimes as well as the reaction rates are determined by fitting the analytical solution of a simplified set of rate equations to the experimental measured time evolutions of the products of the photochemical reaction. In this way we also extracted the activation energies according to the Arrhenius relation for the NaHg molecule to be produced in their II1/2 and III1/2 electronically excited states, respectively.

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“…HgLi and its potential energy curve were studied by molecular beam scattering experiments [ 40 – 43 ], laser spectroscopy [ 44 – 48 ], and quantum chemical calculations [ 19 , 49 ]. Similar investigations were carried out for HgNa (molecular beam scattering experiments [ 50 , 52 , 53 ], pseudopotential calculations [ 19 , 54 ], and relativistic all-electron calculations [ 55 , 56 ]) and HgK (molecular beam scattering experiments, [ 51 , 57 , 58 ] pseudopotential calculations [ 59 ]). No experimental data are available for the corresponding cations.…”

Section: Comparison With Experimental Hga Datamentioning

confidence: 90%