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Article
Accurate determination of the atomic number density in dense Cs vapors by absorption measurements of Cs2 triplet bands
The spectra of Cs metal vapor have been experimentally investigated by spatially resolved absorption in overheated cesium vapor generated in a heat pipe oven. The reduced absorption coefficients of the triplet...
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Article
Examination of the oxygenation state of hemoglobin in a phantom and in-vivo tissue applying absorption balancing with two and three laser wavelengths
Two-dimensional absorption measurements of hemoglobin in (i) a phantom, imitating the optical properties of tissue, and (ii) in-vivo breast tissue are reported. The method is based on quasi-simultaneous balanc...
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Article
Comparison of theoretical and experimental red and near infrared absorption spectra in overheated potassium vapour
The K2 molecular spectra have been theoretically and experimentally investigated in the wavelength range between 550 nm and 1100 nm and at the temperatures between 650 K and 1100 K. Semiclassical theoretical si...
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Article
Determination of the parameters of condensed media by the dual-wavelength differential absorption method
A method of dual-wavelength differential absorption with the use of diode lasers is proposed. The method makes it possible to detect changes in parameters of media that cause broad absorption lines of selected...
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Article
Femtosecond laser analytical mass spectrometry applied to plant samples
The unique ability of ultra-short laser pulses to couple energy into material faster than the energy diffuses, enables laser ablation of bio-samples without heat transfer to the surrounding material. In partic...
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Article
Cavity enhanced wavelength modulation spectrometry for application in chemical analysis
A simple and robust absorption technique is developed which combines cavity enhanced absorption spectroscopy and wavelength modulation spectroscopy and measures the integrated output of unlocked cavities. The ...
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Article
Determination of Individual Species by Liquid Chromatography Combined with an Element-Selective Detector Based on Diode Laser Atomic Absorption Spectrometry
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Article
Oscillator strength of the strongly “forbidden” Pb 6 p 2 3 P 0 ↦6 p 2 3 P 1 transition at 1278.9 nm
The “forbidden” Pb 6p2 3P 0 ↦6 p 2 3P1 line at 1278.9 nm is measured by diode laser absorption in a resistively heated hot-pipe filled with ...
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Article
Impact broadening and shift rates for the 6p2 3PJ′ → 7s 3P J o transitions of lead induced by collisions with argon and helium
The collisional broadening and shift rate coefficients of the 283.39 nm (6p 2 3P0 → 7s 3P 1 o ), 364.06 nm (6p 2 3P1 → 7s 3P ...
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Article
Element-selective trace detection of toxic species in environmental samples using chromatographic techniques and derivative diode laser absorption spectrometry
absorption per square root of detection bandwidth are obtained if sufficient laser power is available and if the absorption is also subject to additional modulation. The analytical versatility of these techni...
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Article
Isotope selective element analysis by diode laser atomic absorption spectrometry
The analytical figures of merit of isotope selective diode laser atomic absorption spectrometry (DLAAS) in low-pressure graphite furnaces are given for lithium and rubidium. While6Li and7Li were measured by Doppl...
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Article
Energy pooling to the level arising from collisions between pairs of metastable atoms
The energy-pooling rate coefficient for the process has been measured. The barium atoms were excited by a cw diode laser tuned to the fr...
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Article
Energy pooling in cesium vapor
We report an experimental study of energy pooling collisions involving Cs atoms in the 6P and 5D states. The 5D state was populated by a cw dye-laser tuned to the cesium dipole-forbidden transition 6S → 5D at 685...
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Article
The collision cross sections for the fine-structure mixing of caesium 6P levels induced by collisions with potassium atoms
The cross section for the fine-structure excitation transfer Cs(6P 1/2) → Cs(6P 3/2), induced by collisions with the ground state potassium atoms, has been measured by resonant Doppler-free two-photon spectroscop...
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Article
Collisional excitation transfer between lithium isotopes
Excitation transfer between the 3S 1/2 states of the lithium isotopes6Li and7Li is measured in a thermionic diode. The 3S level is excited by off-resonant two-photon transitions with a single mode ew laser. The r...
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Article
Population and deactivation of lowest lying barium levels by collisions with He, Ar, Xe and Ba ground state atoms
Excitation transfer between the barium low lying excited states 6s6p 3 P 1 0 , 6s5d 1 D 2 and 6s5d 3 D J by collisions with He,Ar,Xe and Ba has been investigat...
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Article
Collision cross sections for excitation energy transfer in Na* (3P 1/2)+K(4S 1/2)⇔Na*(3P 3/2)+K(4S 1/2) processes
The cross sections for the excitation energy transfer between the 32 P J states of sodium atoms by collisions with ground-state potassium atoms have been measured by resonant D...
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Article
Measurement and calculation of the fine structure changing collision cross sections in the Mg+ and Ca+ resonance states by helium
Using laser ablation of solid samples in a buffer gas atmosphere, free magnesium and calcium ions are produced within a confined volume of a laser produced plasma above the sample surface. The fine structure t...
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Article
Spatial distributions of electron density in microplasmas produced by laser ablation of solids
The spatial distribution of electron density in argon microplasmas produced by laser ablation of solids has been investigated by time-resolved emission spectroscopy. The electron density was derived from Stark...
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Article
Excitation energy transfer in the Li-Cs collision: Li*(2P)+Cs(6S)→Li(2S)+Cs*(5D)
The measurement of the collisional cross section for the process Li*(2P)+Cs(6S)→Li(2S)+Cs*(5D) are reported. The technique of resonant Doppler-limited two-photon laser excitation with thermionic detection is appl...
