Long-range Interactions for the A^31_u and B^30^+_u States of Cd_2 from Line Shape Measurements

• Authors: T. Grycuk , M. Michalicka , J. Rogaczewski
• Languages of publication: EN

Abstracts

EN

We report on very precise measurements of the absorption profile of the 326.1 nm resonance line of cadmium broadened by interactions with the ground state Cd atoms under thermal equilibrium. The experimental red wing profiles, corrected for the Boltzmann factor at different temperatures, are analysed in terms of the long-range potential parameters including dispersion and resonant interactions. The resonant interaction energy constant C_3 is calculated to be 2.31×10^{-2} eV Å^3 and the van der Waals constant C_6 for difference potentials between the ground state X^10^+_ g and the excited states B^30^+_u and A^31_u of Cd_2 derived experimentally are found to be (182.6± 8) eV Å^6 and (289±4) eV Å^6, respectively. The former is determined for the first time and the latter is considerably corrected in comparison to earlier determination. The van der Waals constant C_6 for the ground state of Cd_2 is discussed and estimated to be C_6^g=(247± 40) eV Å^6.

Keywords

EN

33.70.-w; 34.20.-b; 32.70.-n

Discipline

• 33.70.-w: Intensities and shapes of molecular spectral lines and bands
• 32.70.-n: Intensities and shapes of atomic spectral lines(see also 31.15.-p Calculations and mathematical techniques)
• 34.20.-b: Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions(see also 82.20.Kh Potential energy surfaces for reactions; for potential energy surfaces in electronic structure calculations, see 31.50.-x)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2002
• Volume: 101
• Issue: 6
• Pages: 825-836

Dates

published

2002-06

received

2002-02-19

Contributors

author

T. Grycuk

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland

author

M. Michalicka

• Grammar School No 3, Conrada 6, 01-922 Warszawa, Poland

author

J. Rogaczewski

• Institute of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warszawa, Poland

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Identifiers

DOI

10.12693/APhysPolA.101.825