Laser-Excited Emission from Glyoxal and Its Deuterated Derivatives

1973 ◽  
Vol 51 (14) ◽  
pp. 1491-1496 ◽  
Author(s):  
Ronald Y. Dong ◽  
D. A. Ramsay
Keyword(s):  
Emission Spectra ◽  
Argon Ion Laser ◽  
Ion Laser ◽  
Vibrational Constants ◽  
Argon Ion ◽  
Good Agreement

Emission spectra of glyoxal, glyoxal-d1, and glyoxal-d2 have been excited using the various lines of an argon ion laser. The bands have been assigned to 3 band systems, viz. the 1Au–1Ag and 3Au–1Ag (π*–n) systems of the trans molecule and the 1B1–1A1 (π*–n) system of the cis molecule. The vibrational constants are in good agreement with earlier values. Some new vibrational constants have been determined.

Experimental Investigations of Annular Liquid Curtains

1990 ◽  
Vol 112 (1) ◽  
pp. 61-66 ◽  
Author(s):  
K. D. Kihm ◽  
N. A. Chigier
Keyword(s):  
Laser Doppler Velocimeter ◽  
Experimental Investigations ◽  
Photographic Recording ◽  
Recording Technique ◽  
Argon Ion Laser ◽  
Theoretical Predictions ◽  
Ion Laser ◽  
Free Falling ◽  
Argon Ion ◽  
Good Agreement

Experiments have been performed to study the dynamics of vertical annular liquid curtains. Using a high and a low speed photographic recording technique, different modes of curtain formation have been visualized: (a) nonpressurized curtain, (b) pressurized steady curtain, (c) pressurized oscillating curtain, and (d) punctured curtain. The velocity of the liquid was measured by an argon-ion laser Doppler velocimeter, and results were compared with free falling motion. The convergence length of the curtain was measured as a function of the pressure differential for different Froude and Weber numbers, and for different nozzle gap widths. The experimental data agree well with existing theoretical predictions for steady curtains. For harmonically oscillating curtains, the average values of minimum and maximum convergence lengths show fairly good agreement with the theory.

Laser Induced Etching for Generation of Si Nanocrystals and Spectroscopic Investigation of Morphology

2005 ◽  
Vol 23 ◽  
pp. 43-46
Author(s):  
H.S. Mavi ◽  
S. Rath ◽  
Arun Shukla
Keyword(s):  
Quantum Confinement ◽  
Silicon Nanocrystals ◽  
Laser Wavelength ◽  
Interconnected Network ◽  
Substrate Type ◽  
Argon Ion Laser ◽  
Si Nanocrystals ◽  
Ion Laser ◽  
Laser Induced Etching ◽  
Argon Ion

Laser-induced etching of silicon is used to generate silicon nanocrystals. The pore structure depends on the substrate type and etching laser wavelength. Porous silicon (PS) samples prepared by Nd:YAG laser (1.16 eV) etching of n-type substrate showed a fairly uniform and highly interconnected network of nearly circular pores separated by thin columnar boundaries, while no circular pits were produced by argon- ion laser (2.41 eV) etching under similar conditions. The size and size distribution of the nanocrystals are investigated by Raman and photoluminescence spectroscopies and analyzed within the framework of quantum confinement models.

Electron temperatures in a segmented-metal argon-ion laser

1972 ◽  
Vol 5 (10) ◽  
pp. 1807-1814 ◽  
Author(s):  
A Maitland ◽  
J C L Cornish
Keyword(s):  
Argon Ion Laser ◽  
Ion Laser ◽  
Argon Ion

scholarly journals Spectroscopic Properties of Photoproduct of Hematoporphyrin Derivative Oligomer by Photoradiation of Argon-ion Laser

1988 ◽  
Vol 8 (4) ◽  
pp. 3-9
Author(s):  
Norio MIYOSHI ◽  
Takahiro SEKI ◽  
Shuichi KINOSHITA ◽  
Takashi KUSHIDA ◽  
Tsuyoshi NISHIZAKA ◽  
...  
Keyword(s):  
Spectroscopic Properties ◽  
Hematoporphyrin Derivative ◽  
Argon Ion Laser ◽  
Ion Laser ◽  
Argon Ion

scholarly journals Endoscopic phototherapy using argon ion laser for gastrointestinal tumors

1982 ◽  
Vol 3 (1) ◽  
pp. 35-38
Author(s):  
Masatoshi Esaki ◽  
Hideo Hiratsuka ◽  
Mamoru Hiyama ◽  
Osamu Ueda ◽  
Yukio Toda ◽  
...  
Keyword(s):  
Gastrointestinal Tumors ◽  
Argon Ion Laser ◽  
Ion Laser ◽  
Argon Ion

Determination of Subnanosecond Fluorescence Lifetimes with a UHF Television Tuner and a cw or Mode-Locked Laser

1986 ◽  
Vol 40 (5) ◽  
pp. 683-687 ◽  
Author(s):  
Frank V. Bright ◽  
Daniel A. Wilson ◽  
Gary M. Hieftje
Keyword(s):  
High Frequency ◽  
Rhodamine 6G ◽  
Instrument Design ◽  
Fluorescence Lifetimes ◽  
New Approach ◽  
Ion Laser ◽  
Subnanosecond Fluorescence ◽  
Argon Ion ◽  
Good Agreement

An inexpensive ultra-high-frequency (UHF) television tuner and an argon-ion laser are employed for the determination of excited-state lifetimes of a series of common fluorophores. Fluorescence lifetimes are determined in the frequency domain; the results are in good agreement with previously reported values and demonstrate the utility of the new approach for subnanosecond measurements. Binary mixtures of rhodamine 6G and rose bengal can also be resolved with the use of this novel instrument design.

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