Theoretical study of the absorption spectra of the lithium dimer

For the lithium dimer we calculate cross sections for absorption of radiation from the vibrational-rotational levels of the ground X [singlet Sigma g +] electronic state to the vibrational levels and continua of the excited A [singlet Sigma u +] and B [singlet Pi u] electronic states. Theoretical and experimental data are used to characterize the molecular properties taking advantage of knowledge recently obtained from photoassociation spectroscopy and ultra-cold atom collision studies. The quantum-mechanical calculations are carried out for temperatures in the range from 1000 to 2000 K and are compared with previous calculations and measurements.

[1]  Bussery,et al.  Dipole Polarizabilities of Li, C, and O and Long-Range Coefficients for Various Molecular States of Li2, CO, and O2 , 1997, Journal of molecular spectroscopy.

[2]  P. S. Erdman,et al.  High temperature, high density observation and modeling of the lithium 1 3Σu+ − 1 3Πg transition , 1996 .

[3]  W. T. Zemke,et al.  Analysis of long-range dispersion and exchange interactions of two lithium atoms , 1993 .

[4]  J. P. Woerdman,et al.  The NaHg spectrum revisited: An analysis of the NaHg A2Π state and double-well B2Σ state , 1988 .

[5]  D. D. Konowalow,et al.  Electronic transition dipole moment functions for transitions among the twenty-six lowest-lying states of Li2 , 1987 .

[6]  Robert W. Field,et al.  Perturbations in the Spectra of Diatomic Molecules , 1986 .

[7]  P. Crozet,et al.  Extensive analysis of the X1Σ+g ground state of 7Li2 by laser-induced fluorescence Fourier transform spectrometry , 1986 .

[8]  J. P. Woerdman,et al.  Analysis of satellite and undulation structure in the spectrum of Na+Hg continuum emission , 1985 .

[9]  W. Meyer,et al.  Predissociation lifetimes of the b3Πu state of Li2 and the accidental predissociation of its A1Σu+ state , 1985 .

[10]  M. Aubert-Frécon,et al.  Multipolar long‐range electrostatic, dispersion, and induction energy terms for the interactions between two identical alkali atoms Li, Na, K, Rb, and Cs in various electronic states , 1985 .

[11]  Wilfried Meyer,et al.  Ground- and excited-state properties of Li2 and Li2+ from ab initio calculations with effective core polarization potentials , 1985 .

[12]  H. Kurtz,et al.  Excited states via the AGP polarization propagator. I. Application to Li2 , 1984 .

[13]  H. Kornmeier,et al.  Time spectroscopy in the a1Σu+ states of Li2 and Na2. lifetimes and electronic dipole moment of the A-X transition , 1984 .

[14]  W. Stwalley,et al.  Observation of levels near dissociation in the X 1Σ+g state of 7Li2 , 1983 .

[15]  G. Pichler,et al.  Triplet satellite band in the very far blue wing of the self-broadened lithium resonance line , 1982 .

[16]  J. P. Woerdman.  A note on the transition dipole moment of alkali dimers , 1981 .

[17]  A. Dalgarno,et al.  The photodissociation of Li2 , 1980 .

[18]  C. R. Vidal,et al.  The B1Πu–X1Σg+ band system of the 7Li2 molecule , 1979 .

[19]  A. Dalgarno,et al.  Radiative lifetimes of the B1Π11 states of Li2 , 1978 .

[20]  D. K. Watson.  Theoretical radiative lifetimes for the A 1Σ+u-X 1Σ+g band system of Li2 , 1977 .

[21]  P. Kusch,et al.  An analysis of the A 1Σu+–X 1Σg+ band system of 7Li2 , 1977 .

[22]  M. L. Olson.  The lowest 1?g, 3?g, 1?u and 3?u states of Li2 , 1977 .

[23]  A. Gallagher,et al.  The intensity distribution in the Na2 and Li2 A–X bands , 1977 .

[24]  W. E. Baylis,et al.  Unified Franck-Condon treatment of pressure broadening of spectral lines , 1975 .

[25]  C. Vidal.  Spectroscopic observations of subsonic and sonic vapor flow inside an open-ended heat pipe , 1973 .

[26]  R. A. Buckingham,et al.  Continuous Absorption by the Hydrogen Molecular Ion , 1952 .

[27]  D. R. Bates.  Absorption of Radiation by an Atmosphere of H, $\text{H}^{+}\,\text{and}\,\text{H}_{2}^{+}$—Semi-Classical Treatment , 1952 .

[28]  Claude Garrod,et al.  Statistical mechanics and thermodynamics , 1995 .

[29]  Harald Friedrich,et al.  Theoretical Atomic Physics , 1991 .