Temporal Spectra Behavior in Femtosecond LIBS of Marine Water

2014 ◽  
Vol 644-650 ◽  
pp. 1443-1447
Author(s):  
Alexey Ilyin ◽  
Sergey Golik ◽  
Yuliya Biryukova ◽  
Michael Babiy ◽  
Dmitrii Apeksimov
Keyword(s):  
Detection Limit ◽  
Femtosecond Laser ◽  
Decay Time ◽  
Line Intensity ◽  
Water Surface ◽  
Sea Water ◽  
Recombination Coefficient ◽  
Femtosecond Laser Plasma ◽  
Three Body ◽  
Body Recombination

Spectral dynamics of femtosecond laser plasma induced on the sea water surface is investigated. Characteristic decay time of continuum and line intensity of Mg II, Ca II and Na I are determined. Electron density that changes from 3.0·1016to 2.4·1015cm-3was provided by usage of three-body recombination coefficient. It is shown that Na detection limit will be least in comparison with Mg and Ca.

Spectral characteristics of the femtosecond laser plasma induced on the surface of sea water

2012 ◽  
Vol 25 (6) ◽  
pp. 398-404 ◽  
Author(s):  
A. A. Ilyin ◽  
O. A. Bukin ◽  
E. B. Sokolova ◽  
S. S. Golik ◽  
K. A. Shmirko
Keyword(s):  
Femtosecond Laser ◽  
Laser Plasma ◽  
Sea Water ◽  
Spectral Characteristics ◽  
Femtosecond Laser Plasma

scholarly journals A Spectroscopic Study of a Decaying Hydrogen Plasma

1965 ◽  
Vol 18 (1) ◽  
pp. 23 ◽  
Author(s):  
FE Irons ◽  
DD Millar
Keyword(s):  
Spectroscopic Study ◽  
Hydrogen Plasma ◽  
Experimental Methods ◽  
Recombination Coefficient ◽  
Ion Density ◽  
Temperature Distributions ◽  
Experimental Values ◽  
Three Body ◽  
Body Recombination

A study has been made of the decay of a hydrogen plasma of ion density ~3���1015 cm?3 and temperature ~104�K. Details are presented of the experimental methods used to determine density and temperature distributions in the decaying plasma. The plasma decays by three-body recombination mainly and the experimental values of the recombination coefficient agree with those expected for a plasma opaque to Lyman radiation.

Observation and interpretation of the airglow emissions

1968 ◽  
Vol 46 (14) ◽  
pp. 1613-1626 ◽  
Author(s):  
R. L. Gattinger
Keyword(s):  
Time Constant ◽  
Decay Time ◽  
Atomic Oxygen ◽  
Hydrogen Atmosphere ◽  
Decay Time Constant ◽  
Depression Angle ◽  
Fabry Perot ◽  
Airglow Emissions ◽  
Three Body ◽  
Body Recombination

The [Formula: see text] band at a wavelength of 1.58 μ has been observed with a scanning Fabry–Perot system in the evening twilight airglow at 45.2 °N. The decay time constant at a solar depression angle of 10° was about 45 minutes during the winter and about 30 minutes during the summer. The brightness at a solar depression angle of 6° was about 25 kR for both seasons. The emission could not be detected in the morning twilight. Theoretical solutions were obtained for an oxygen–hydrogen atmosphere to explain the observed behavior of the emission, with the assumption that excitation of the O2(1Δg) state is mainly due to photodissociation of ozone in the Hartley continuum. The results indicate that the ozone dissociation mechanism is probably the correct one. Formation of the O2(1Δg) state by three-body recombination of atomic oxygen has also been included to explain the observed emission of the [Formula: see text] 0,0 band at a wavelength of 1.27 μ in the night airglow. The evening twilight seasonal brightness variations of the 1.27 μ and 1.58 μ bands observed with ground-based instruments have not been satisfactorily explained.

Laserspektroskopische Untersuchungen an nicht-stabilisierten N2(B3IIg, ν; = 13)-Molekülen / Laser Spectroscopic Studies on Non-stabilized N2(B3IIg, ν; = 13) molecules

1976 ◽  
Vol 31 (6) ◽  
pp. 673-674
Author(s):  
K. H. Becker ◽  
H. Engels ◽  
T. Tatarczyk
Keyword(s):  
Detection Limit ◽  
Emission Spectroscopy ◽  
Spectroscopic Studies ◽  
Rotational Analysis ◽  
Tunable Dye Laser ◽  
Recombination Processes ◽  
Three Body ◽  
Laser Spectroscopic ◽  
Body Recombination ◽  
Better Than

Unstabilized N2(B3IIg, ν = 13) quasi-molecules were analysed by excitation with a tunable dye-laser into the N2(C3IIu) state and observation of the following fluorescence to N2(B3IIg, ν) levels. The quasi-molecules are in equilibrium with the free nitrogen atoms. The detection limit of this technique is 105 molecules/cm3. By the same method, a rotational analysis of molecules stabilized into (B3IIg, ν ≦ 12) levels by three-body recombination processes was achieved with a resolution better than that reached by emission spectroscopy of the Lewis-Rayleigh afterglow

Electron-ion three-body recombination coefficient of argon

AIAA Journal ◽  
1993 ◽  
Vol 31 (1) ◽  
pp. 75-82 ◽  
Author(s):  
T. G. Owano ◽  
C. H. Kruger ◽  
R. A. Beddini
Keyword(s):  
Recombination Coefficient ◽  
Three Body ◽  
Body Recombination

scholarly journals Three-body recombination calculations with a two-body mapped grid method

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
T. Secker ◽  
J.-L. Li ◽  
P. M. A. Mestrom ◽  
S. J. J. M. F. Kokkelmans
Keyword(s):  
Grid Method ◽  
Three Body ◽  
Body Recombination
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