aqora

Population Inversion of Sodium Levels in a Mixture of Sodium and Mercury Vapors under Optical Excitation

E. K. Kraulinya

Optics and SpectroscopyMay 1, 19650 citations

Sodium Level Population Inversion in Emission from a Mixture of Sodium and Mercury Vapors

S. É. Frish, O. P. Bochkova

Journal of Experimental and Theoretical PhysicsJan 1, 19630 citations

Infrared laser-emission study in a resonantly excited sodium vapor

W. M�ller, Jabez J. McClelland, Ingolf Volker Hertel

Applied Physics BJun 1, 198310 citations

Nonlinear emission in sodium vapour upon pulsed-laser excitation of the 42 P levels

Ursula Domiaty, Dieter Gruber, Laurentius Windholz +5 more

Applied Physics BNov 1, 199413 citations

Coherence Transfer Between the 32P1/2 and 32P3/2 States in Sodium, Induced in Collisions with Noble Gas Atoms

B. Niewitecka, L. Krause

Coherence transfer accompanying 32P1/2 → 32P3/2 excitation transfer in sodium, induced in collisions with noble gas atoms, has been investigated using methods of sensitized fluorescence. Oriented 32P1/2 sodium atoms were produced by irradiating a mixture of sodium vapor and a noble gas with D1σ+ resonance radiation, and their subsequent collisions with the buffer gas atoms resulted in the simultaneous transfer of coherence and excitation from the 2P1/2 state to the 2P3/2 state. Measurements of the ratio of circular polarizations of the D2 sensitized fluorescence and D1 resonance fluorescence resulted in the following cross sections for coherence transfer. Na–He : 7.1 ± 0.7 Å2; Na–Ne : 6.2 ± 0.6 Å2; Na–Ar : 12.0 ± 1.2 Å2; Na–Kr : 6.8 ± 0.7 Å2; Na–Xe : 6.9 ± 0.7 Å2.Coherence transfer accompanying 32P1/2 → 32P3/2 excitation transfer in sodium, induced in collisions with noble gas atoms, has been investigated using methods of sensitized fluorescence. Oriented 32P1/2 sodium atoms were produced by irradiating a mixture of sodium vapor and a noble gas with D1σ+ resonance radiation, and their subsequent collisions with the buffer gas atoms resulted in the simultaneous transfer of coherence and excitation from the 2P1/2 state to the 2P3/2 state. Measurements of the ratio of circular polarizations of the D2 sensitized fluorescence and D1 resonance fluorescence resulted in the following cross sections for coherence transfer. Na–He : 7.1 ± 0.7 Å2; Na–Ne : 6.2 ± 0.6 Å2; Na–Ar : 12.0 ± 1.2 Å2; Na–Kr : 6.8 ± 0.7 Å2; Na–Xe : 6.9 ± 0.7 Å2.

Canadian Journal of PhysicsMay 1, 19732 citations

Single-atom detection by SONRES

Jerry A. Gelbwachs, C. Klein, John E. Wessel

The new method of atomic fluorescence detection, called saturated optical nonresonant emission spectroscopy (SONRES), has been modeled for a three-level atom, and experiments on sodium have been conducted that support the model. A rate equation analysis yielded expressions for excited-state atomic populations and saturation intensity. The detection of sodium in buffer gases that promote collisional transfer of excitation between 32P1/2→ 32p3/2both without quenching the fluorescence emission and with quenching was considered. Experimental results are presented for sodium in argon. At -25°C, approximately 180 atoms/cm3were monitored with a S/N of ∼ 15 representing detection at the level of one part in 1017. The signal at this temperature was generated by less than a single atom in the laser beam.The new method of atomic fluorescence detection, called saturated optical nonresonant emission spectroscopy (SONRES), has been modeled for a three-level atom, and experiments on sodium have been conducted that support the model. A rate equation analysis yielded expressions for excited-state atomic populations and saturation intensity. The detection of sodium in buffer gases that promote collisional transfer of excitation between 32P1/2→ 32p3/2both without quenching the fluorescence emission and with quenching was considered. Experimental results are presented for sodium in argon. At -25°C, approximately 180 atoms/cm3were monitored with a S/N of ∼ 15 representing detection at the level of one part in 1017. The signal at this temperature was generated by less than a single atom in the laser beam.

IEEE Journal of Quantum ElectronicsFeb 1, 197823 citations

Determination of the populations of the (32P1/2, 32P3/2) levels with laser excitation of sodium vapor

Related papers

Determination of the populations of the (32P1/2, 32P3/2) levels with laser excitation of sodium vapor

Related papers