Laser-excited fluorescence spectra of lanthanum monoxide. The B2Sigma+ -> X2Sigma+ system.

Details Laser-excited fluorescence spectra of lanthanum monoxide. The B2Sigma+ -> X2Sigma+ system. Laser-excited fluorescence spectra of lanthanum monoxide. The B2Sigma+ -> X2Sigma+ system.

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..139..163b&link_type=abstract

Astronomy and Astrophysics Supplement, v.139, p.163-166

Astronomy and Astrophysics

Astrophysics

2

Molecular Data, Line: Identification

Scientific paper

Fluorescence spectra of lanthanum monoxide excited by selected Ar(+) and Kr(+) laser lines have been analysed by Fourier transform spectrometry. Rotational levels in the B(2Sigma ^+(v=2,) 3, 4) electronic state have been populated either directly or after collisional relaxation, inducing many fluorescence transitions to the ground state X(2Sigma ^+(v=1) to 5). Under our experimental conditions, bands of the Delta v=0 sequence of the B{->}X system also appear, fairly developed. A global treatment of the wavenumbers of some 830 lines in 9 bands of the system, involving the levels v'=0 to 4 and v''=0 to 5, is carried out. The consistent set of accurate effective spectroscopic constants for both electronic states, directly obtained at equilibrium, is expected to be useful for high resolution syntheses of S-type stellar spectra. Line lists are available in electronic form via http://www-obs.univ-lyon1.fr/~ABernard/LaO

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