ChemInform Abstract: LASER INDUCED FLUORESCENCE SPECTRA OF THE A3ΠU-X1ΣG+ BAND OF DIATOMIC SODIUM BY MOLECULAR BEAM

1983 ◽  
Vol 14 (18) ◽  
Author(s):  
K. SHIMIZU ◽  
F. SHIMIZU
Keyword(s):  
Fluorescence Spectra ◽  
Molecular Beam ◽  
Laser Induced Fluorescence

scholarly journals Pyrimidine, an Intermediate State Molecule?

1986 ◽  
Vol 5 (6) ◽  
pp. 339-350 ◽  
Author(s):  
W. Leo Meerts ◽  
W. A. Majewski
Keyword(s):  
Excited State ◽  
High Resolution ◽  
Ring Laser ◽  
Fluorescence Spectra ◽  
Molecular Beam ◽  
Energy Levels ◽  
Laser Induced Fluorescence ◽  
Spectral Features ◽  
Electronically Excited State ◽  
Electronically Excited

The S1(1B1) ← S0(1A1) transition in pyrazine has been investigated. High resolution laser induced fluorescence spectra were obtained by crossing a well collimated molecular beam with UV radiation of an intra-cavity frequency doubled ring laser. The extreme resolution enabled us to observe the molecular eigenstates of the electronically excited state. Most of the spectral features of the S1 state could be interpreted in terms of a slightly perturbed axis switched rotor spectrum. The perturbations show up both in the energy levels of the S1 and in the intensities of the observed transitions.

Effects of UV-B Radiation on Laser-Induced Fluorescence Spectra in Crop Leaves

2001 ◽  
Vol 22 (2) ◽  
pp. 151-155 ◽  
Author(s):  
K. Mineuchi ◽  
K. Takahashi ◽  
H. Tatsumoto
Keyword(s):  
Fluorescence Spectra ◽  
Laser Induced Fluorescence

Cervical Precancer Detection Using a Multivariate Statistical Algorithm Based on Laser-Induced Fluorescence Spectra at Multiple Excitation Wavelengths

1996 ◽  
Vol 64 (4) ◽  
pp. 720-735 ◽  
Author(s):  
Nirmala Ramanujam ◽  
Michele Follen Mitchell ◽  
Anita Mahadevan-Jansen ◽  
Sharon L. Thomson ◽  
Gregg Staerkel ◽  
...  
Keyword(s):  
Fluorescence Spectra ◽  
Laser Induced Fluorescence ◽  
Multivariate Statistical ◽  
Statistical Algorithm ◽  
Cervical Precancer

scholarly journals Absorption and Laser Induced Fluorescence Spectroscopy of Neutral Polycyclic Aromatic Hydrocarbons in Argon matrices

2015 ◽  
Vol 11 (A29A) ◽  
Author(s):  
Salma Bejaoui ◽  
Farid Salama ◽  
Ella Sciamma-O'Brien
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Fluorescence Spectra ◽  
Laser Induced Fluorescence ◽  
Broad Emission Band ◽  
Band Emission ◽  
Polycyclic Aromatic ◽  
Argon Matrices ◽  
Extended Red Emission ◽  
Solid Argon

Polycyclic aromatic hydrocarbons (PAHs) are considered as plausible carriers for the extended red emission (ERE), a photoluminescent process associated with a wide variety of interstellar environments, as well as for broad emission band features seen in cometary spectra. We report the absorption spectra of phenanthrene, anthracene, fluoranthene, pentacene, pyrene, chrysene and triphenylene isolated at 10 K in solid argon matrices together with laser induced fluorescence (LIF) spectra at 355 nm of matrix-isolated anthracene and fluoranthene. LIF spectra are compared with the UV/blue fluorescence spectra of the Red Rectangle Nebula (RR). The LIF spectra measured in solid Ar matrices have been shifted to the predicted position of the PAH band emission in the gas phase for comparison with the astronomical observations (Fig. 1).

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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