scholarly journals THE ATOMIC-MOLECULAR PROCESSES IN A HYDROGEN PLASMA AT INITIAL STAGE OF A DISCHARGE

2019 ◽  
pp. 105-109
Author(s):  
V.B. Yuferov ◽  
E.I. Skibenko ◽  
V.I. Tkachov ◽  
V.V. Katrechko ◽  
A.S. Svichkar
Keyword(s):  
Energy Balance ◽  
Hydrogen Plasma ◽  
Molecular Ions ◽  
Plasma Formation ◽  
Molecular Processes ◽  
Initial Stage ◽  
A Charge

For 0-dimensional the task of a hydrogen plasma formation at initial stage of a charge is considered. For these conditions the dynamics of atomic and molecular ions density and energy balance in a hydrogen plasma are considered.

Influence of molecular processes on the hydrogen atomic system in an expanding argon–hydrogen plasma

1995 ◽  
Vol 2 (3) ◽  
pp. 1002-1008 ◽  
Author(s):  
R. F. G. Meulenbroeks ◽  
R. A. H. Engeln ◽  
C. Box ◽  
I. de Bari ◽  
M. C. M. van de Sanden ◽  
...  
Keyword(s):  
Atomic System ◽  
Hydrogen Plasma ◽  
Molecular Processes

Production of Molecular Clusters of Lithium Niobate by Ultraviolet and Visible Laser Ablation

1991 ◽  
Vol 243 ◽  
Author(s):  
R. F. Haglund ◽  
K. Tang ◽  
C. H. Chen
Keyword(s):  
Thin Film ◽  
Laser Ablation ◽  
Lithium Niobate ◽  
Thin Film Deposition ◽  
Molecular Clusters ◽  
Molecular Ions ◽  
Great Sensitivity ◽  
Plasma Formation ◽  
Film Deposition ◽  
Visible Laser

AbstractWe have investigated laser ablation of molecular ions from the ferroelectric LiNbO3 at 532, 355 and 266 nm, comparing the effects of changing wavelength and intensity. The time-of-flight spectra show great sensitivity to the onset of plasma formation. Just below the plasma formation threshold, production of the monomer, dimer and trimer negative molecular ions were observed. Possible implications for thin-film deposition processing are discussed.

Vacuum-ultraviolet (147.0 nm and 123.6 nm) photolysis of 1,1-dimethylcyclopropane

1981 ◽  
Vol 59 (3) ◽  
pp. 537-542
Author(s):  
Joseph B. Binkewicz ◽  
Michael Kaplan ◽  
Richard D. Doepker
Keyword(s):  
Gas Phase ◽  
Vacuum Ultraviolet ◽  
Molecular Processes ◽  
Radical Scavengers ◽  
Primary Reaction ◽  
Radical Species ◽  
Molecule Reaction ◽  
Reaction Channels ◽  
A Charge ◽  
Photo Decomposition

The gas-phase photolysis of 1,1-dimethylcyclopropane has been investigated using xenon (147.0 nm) and krypton (123.6 nm) resonance radiation. Major products observed in order of decreasing importance were isobutene, ethylene, hydrogen, 1,3-butadiene 2-methyl-1,3-butadiene, propylene, allene, methylacetylene, and acetylene. Radical scavengers, NO and O2, and radical interceptors, H2S/D2S and HI, were used to determine the relative importance of radical and molecular processes. CH3, C2H3, C3H5, and C4H7 radical species were identified and quantified. Ten primary reaction channels were postulated, of which the elimination of methylene was the most predominant, accounting for 34% of the photo-decomposition at 147.0 nm and 39% at 123.6 nm. Although ionization was established at 123.6 nm (η = 0.10) the nature of a charge transfer or other ion-molecule reaction channel leading to the formation of 2-methyl-1-butene and 2-methyl-2-butene could not be determined.

Influence of Specific Absorbed Microwave Power on Activation Energy of Densification in Ceramic Materials

1996 ◽  
Vol 430 ◽  
Author(s):  
Y. Bykov ◽  
A. Eremeev ◽  
V. Holoptsev
Keyword(s):  
Activation Energy ◽  
Silicon Nitride ◽  
Energy Balance ◽  
Experimental Method ◽  
Microwave Power ◽  
Ceramic Materials ◽  
Energy Of Activation ◽  
Initial Stage ◽  
Microwave Furnace ◽  
Apparent Energy Of Activation

AbstractCorrelation between the rate of densification in powder ceramic materials and specific absorbed microwave power is determined by the experimental method. The approach is based on a comparison of the densification curves obtained at different rates of heating. The changes in the ramping rate are provided by varying the microwave power fed into the microwave furnace. Using the energy balance for the microwave heated samples, the correlation between the apparent energy of activation at the initial stage of densification and the value of the specific microwave power absorbed in heated materials are found. The experiments with silicon nitride-based ceramics allowed to determine the reduction in the value of the activation energy resulted from an increase in the specific absorbed microwave power.

Anode Plasma Formation at the Initial Stage of a Nanosecond Air Discharge

2018 ◽  
Vol 126 (3) ◽  
pp. 422-429 ◽  
Author(s):  
E. V. Parkevich ◽  
A. I. Khirianova ◽  
A. V. Agavonov ◽  
S. I. Tkachenko ◽  
A. R. Mingaleev ◽  
...  
Keyword(s):  
Plasma Formation ◽  
Initial Stage ◽  
Anode Plasma ◽  
Air Discharge

scholarly journals Mol-D a Database and a Web Service within the Serbian Virtual Observatory and the Virtual Atomic and Molecular Data Centre

2016 ◽  
Vol 12 (S325) ◽  
pp. 393-396 ◽  
Author(s):  
Vladimir A. Srećković ◽  
Darko Jevremović ◽  
Veljko Vujčić ◽  
Ljubinko M. Ignjatović ◽  
Nenad Milovanović ◽  
...  
Keyword(s):  
Web Service ◽  
Cross Sections ◽  
Molecular Data ◽  
Molecular Ions ◽  
Stellar Atmospheres ◽  
Rate Coefficients ◽  
Virtual Observatory ◽  
Stage Of Development ◽  
Initial Stage ◽  
Ongoing Work

AbstractIn this contribution we report the current stage of the MOLecular Dissociation (MOL-D) database which is a web service within the Serbian virtual observatory (SerVO) and node within Virtual Atomic and Molecular Data Center (VAMDC). MOL-D is an atomic and molecular (A&M) database devoted to the modelling of stellar atmospheres, laboratory plasmas, industrial plasmas etc. The initial stage of development was done at the end of 2014, when the service for data connected with hydrogen and helium molecular ions was done. In the next stage of the development of MOL-D, we include new cross-sections and rate coefficients for processes which involve species such as XH+, where X is atom of some metal. Data are important for the exploring of the interstellar medium as well as for the early Universe chemistry and for the modeling of stellar and solar atmospheres. In this poster, we present our ongoing work and plans for the future.

Fast In-diffusion of Hydrogen at the Initial Stage of Hydrogen Plasma Treatment on a-Si:H Films Observed by In-situ ESR Measurements

2000 ◽  
Vol 609 ◽  
Author(s):  
Ujjwal Kr. Das ◽  
Tetsuji Yasuda ◽  
Satoshi Yamasaki
Keyword(s):  
Diffusion Coefficient ◽  
Atomic Hydrogen ◽  
Hydrogen Plasma ◽  
Hydrogen Treatment ◽  
Initial Stage ◽  
Lower Treatment ◽  
Spin Resonance ◽  
High Diffusion Coefficient ◽  
Diffusion Of Hydrogen

ABSTRACTTime evolution of Si dangling bonds (dbs) was monitored during atomic hydrogen treatment of a-Si:H films using an in-situ electron-spin-resonance (ESR) technique. A high diffusion coefficient (>10−10 cm2s−1) of free atomic H in a-Si:H was detected at the very initial stage of H exposure. Atomic H diffuses into the bulk of the film (∼100 nm) and creates additional metastable dbs. The spatial distribution of such metastable dbs becomes deeper at lower treatment temperatures. An activated type of db creation reaction determines the distribution of these dbs.

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