Production of Metastable Hydrogen Atoms in Proton—Rare-Gas Collisions

1965 ◽  
Vol 137 (2A) ◽  
pp. A340-A346 ◽  
Author(s):  
D. Jaecks ◽  
B. Van Zyl ◽  
R. Geballe
Keyword(s):  
Rare Gas ◽  
Hydrogen Atoms

Multiple Trapping Sites for Hydrogen Atoms in Rare Gas Matrices

1960 ◽  
Vol 32 (4) ◽  
pp. 963-971 ◽  
Author(s):  
S. N. Foner ◽  
E. L. Cochran ◽  
V. A. Bowers ◽  
C. K. Jen
Keyword(s):  
Rare Gas ◽  
Hydrogen Atoms ◽  
Multiple Trapping ◽  
Trapping Sites

Free radicals formed by reaction of silane with hydrogen atoms in rare gas matrices at very low temperatures

1985 ◽  
Vol 83 (9) ◽  
pp. 4504-4510 ◽  
Author(s):  
K. Nakamura ◽  
N. Masaki ◽  
S. Sato ◽  
K. Shimokoshi
Keyword(s):  
Free Radicals ◽  
Low Temperatures ◽  
Rare Gas ◽  
Hydrogen Atoms

Vacuum Ultraviolet Photolysis of Trimethylethylene

1974 ◽  
Vol 52 (1) ◽  
pp. 34-38 ◽  
Author(s):  
Guy J. Collin ◽  
Christian M. Gaucher
Keyword(s):  
Quantum Yield ◽  
Vacuum Ultraviolet ◽  
Radical Reactions ◽  
High Yield ◽  
Rare Gas ◽  
Static System ◽  
Hydrogen Atoms ◽  
Ultraviolet Photolysis ◽  
Ethyl Radicals ◽  
Secondary Carbon

The vacuum u.v. photolysis of trimethylethylene (2-methyl-2-butene) was carried out in a static system using rare gas resonance lamps: xenon (147.0 nm) and krypton (123.6 nm). The main hydrocarbon products were isoprene, 1,3-butadiene, propyne, allène, ethylene, and other minor products. Identification and measurements of the yields of hydrogen atoms, methyl, and ethyl radicals were carried out quantitatively by the use of radical–radical reactions. Because of the high yield of isoprene, the effect of conversion was studied. At a high conversion (i.e. 0.1%) the isoprene quantum yield decreases. Hydrogen atoms add mainly to the secondary carbon of the monomer (≥90%). The Δ(CH3,tert-C5H11) value was calculated to be 1.32 ± 0.14. With the krypton line (10.0 eV) no evidence was found for the participation of ionic reactions in the formation of the measured products except for the formation of 2-methyl-1-butene in a low yield. At this wavelength the ion quantum yield is 0.224 ± 0.005.

Remarks on the diffuse interstellar lines

1967 ◽  
Vol 31 ◽  
pp. 91-93 ◽  
Author(s):  
G. Herzberg
Keyword(s):  
Hydrogen Atoms ◽  
Interstellar Gas

It is suggested that the diffuse interstellar lines are produced in the interstellar gas by molecules consisting of a few hydrogen atoms and one other atom, such as CH4+ or NH4. Diffuseness of the lines is assumed to result from predissociation of these molecules.

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