Absolute number density calibration of the absorption by ground-state lead atoms of the 283.3-nm resonance line from a high-intensity lead hollow cathode lamp and the calculated effect of argon pressures

1991 ◽  
Vol 95 (6) ◽  
pp. 2361-2364
Author(s):  
John W. Simons ◽  
Roy E. McClean ◽  
Richard C. Oldenborg
Keyword(s):  
Hollow Cathode ◽  
Ground State ◽  
High Intensity ◽  
Resonance Line ◽  
Absolute Number ◽  
Number Density ◽  
Hollow Cathode Lamp ◽  
Calculated Effect

Analyse Rotationnelle de la Bande (0,0) du Système Orange de ScO

1972 ◽  
Vol 50 (4) ◽  
pp. 395-403 ◽  
Author(s):  
R. Stringat ◽  
C. Athénour ◽  
J. L. Féménias
Keyword(s):  
Excited State ◽  
Hyperfine Interaction ◽  
Hyperfine Structure ◽  
Liquid Nitrogen ◽  
Hollow Cathode ◽  
Ground State ◽  
Type B ◽  
Hollow Cathode Lamp ◽  
Magnetic Hyperfine Interaction ◽  
Coupling Case

The orange system of ScO has been reanalyzed as a 2Π → 2Σ transition. We have observed all the branches which are compatible with the selection rules ΔJ = 0, ± 1. We have not detected the hyperfine structure in the excited state, the coupling case being therefore aβ. The magnetic hyperfine interaction inducing the ground state doubling is the only one which appears; it has been analyzed by other authors who have shown that the coupling case for this state is of the type bβS.The use of an alloy hollow-cathode lamp, cooled with liquid nitrogen, has enabled us to improve the frequency measurements. The values of the constants have been obtained by a method by which, working directly with the Hamiltonian, the introduction of each parameter can be justified. The study of the Λ doubling in 2Π3/2 and 2Π1/2 levels leads us to values of ξ and η very close to those predicted for a pure precession case.

Lifetime of the 6s6p1P1 level of barium

1970 ◽  
Vol 48 (7) ◽  
pp. 879-883 ◽  
Author(s):  
L. O. Dickie ◽  
F. M. Kelly
Keyword(s):  
Recent Work ◽  
Hollow Cathode ◽  
Atomic Beam ◽  
Resonance Line ◽  
Resonance Radiation ◽  
Zero Field ◽  
Excited Singlet ◽  
Level Crossing ◽  
Hollow Cathode Lamp ◽  
Good Agreement

The lifetime of the first excited singlet P level of barium, 6s6p1P1, has been determined from the width of the zero field level crossing, i.e. the Hanle effect, of the 6s6p1P1 –6s21S0, 5535 Å resonance line. The resonance radiation was produced in a hollow cathode lamp and the scattering atoms by an atomic beam. After taking account of coherence narrowing, the lifetime is determined to be 8.37 ± 0.14 × 10−9 s, in good agreement with other recent work.

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