Excimer Laser Photolysis of Organometallic Compounds Adsorbed on Substrates

1987 ◽  
Vol 101 ◽  
Author(s):  
Hideyuki Suzuki ◽  
Koji Mori ◽  
Masahiro Kawasaki ◽  
Hiroyasu Sato
Keyword(s):  
Excimer Laser ◽  
Organometallic Compounds ◽  
Laser Induced Fluorescence ◽  
Laser Photolysis ◽  
Excitation Wavelength ◽  
Temperature And Pressure

ABSTRACTExcimer laser photolysis at 248 nm of trimethylgal1ium (TMG) was studied by probing gallium atoms by laser induced fluorescence (LIF) technique. From the dependence of LIF intensity on the excitation wavelength, temperature and pressure, a thermally assisted photodissociation in the chemisorbed state was concluded.

scholarly journals Carbon Isotope Selective Separation From MPD of CF3Br With a TEA CO2 Laser

1998 ◽  
Vol 18 (1-2) ◽  
pp. 85-97
Author(s):  
J. I. del Barrio ◽  
R. Fernández Cézar ◽  
F. M. G.- Tablas
Keyword(s):  
Enrichment Factor ◽  
Carbon Isotope ◽  
Co2 Laser ◽  
Mass Spectrometric ◽  
Spectrometric Analysis ◽  
Excitation Wavelength ◽  
Tea Co2 Laser ◽  
Polyatomic Gases ◽  
Temperature And Pressure ◽  
Crucial Parameter

Pure CF3Br and mixtures of this substance with monoatomic (He, Ar and Xe), homonuclear diatomic (H2, D2, N2), polyatomic gases (CF4) and NO have been irradiated with a TEA CO2 laser. Carbon-13 enrichment factor and carbon-13 selectivity have been estimated from the mass spectrometric analysis of the undissociated CF3Br as a function of excitation wavelength, fluence, temperature and pressure. The irradiating wavelength is a crucial parameter to achieve enrichment. The nature of the added gas also affects considerably selectivity. Best enrichment is achieved in mixtures with NO due to its radical-like character.

scholarly journals Remote Laser Induced Fluorescence of Soils and Rocks

Photonics ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 411
Author(s):  
Vasily N. Lednev ◽  
Alexey F. Bunkin ◽  
Sergey M. Pershin ◽  
Mikhail Ya. Grishin ◽  
Diana G. Artemova ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Fluorescence Spectra ◽  
Space Exploration ◽  
Laser Induced Fluorescence ◽  
Excitation Wavelength ◽  
Extraterrestrial Life ◽  
Future Space ◽  
Lidar Sensing ◽  
First Time ◽  
Different Soils

The laser induced fluorescence spectroscopy was systematically utilized for remote sensing of different soils and rocks for the first time, to the best of our knowledge. Laser induced fluorescence spectroscopy measurements were carried out by the developed nanosecond LIDAR instrument with variable excitation wavelength (355, 532 and 1064 nm). LIDAR sensing of different Brazil soil samples have been carried out in order to construct a spectral database. The laser induced fluorescence spectra interpretation for different samples has been discussed in detail. The perspectives of LIDAR sensing of organic samples deposited at soils and rock have been discussed including future space exploration missions in the search for extraterrestrial life.

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