Microwave discharge, to produce

A discharge flow-resonance fluorescence system has been constructed for use in these studies. A mixture of H2 in He was passed through a microwave discharge to produce H atoms. Very low concentrations of H atoms can be generated by passing "pure" He through the discharge. In all of the experiments described in... 

The main difference between plasma surface treatment and corona surface treatments is the nature of the plasma (specialty gas vs. air) and the operating pressure of the plasma (0.1-10 torr vs. 760 torr). With the plasma treatment technique, a low-pressure inert gas is activated by an electrodeless radio frequency discharge or microwave excitation to produce metastable excited species that react with the polymeric surface. 

A microwave discharge through GeCl4 vapor at low pressure produced a continuous emission from 3125 to 3341 A, the same range as that observed in the absorption spectrum of GeCl2. 

Radiation is derived from a sealed quartz tube containing a few milligrams of an element or a volatile compound and neon or argon at low pressure. The discharge is produced by a microwave source via a waveguide cavity or using RF induction. The emission spectrum of the element concerned contains only the most prominent resonance lines and with intensities up to one hundred times those derived from a hollow-cathode lamp. However, the reliability of such sources has been questioned and the only ones which are currently considered successful are those for arsenic, antimony, bismuth, selenium and tellurium using RF excitation. Fortunately, these are the elements for which hollow-cathode lamps are the least successful. 

The reaction of CBr4 with potassium is reported to generate free C atoms and the rate constants for reaction with methane, ethylene, and benzene have been reported. The reaction of nitrogen atoms with CN radicals has also been used as a C atom source. Carbon atoms have also been produced by passing organics through a microwave discharge. ... 

Stimulated (laser) excimer emission can be generated in pulsed high-pressure glow discharges. Dielectric barrier (silent) discharges9 or microwave discharges10 can be used to produce quasistationary or continuous incoherent excimer radiation. 

In a similar study, Phillips and Schiff345 found ki9 = 1.3 x 1010. As did Herron, they produced their atoms by a microwave discharge, and all their experiments were carried out at 298°K. Of particular interest in their work was the result that the nitrogen molecules produced in the reaction had sufficient energy to dissociate ozone i.e., more than 25.5 kcal/mole. Subsequent investigation showed that 75% of the molecular nitrogen was so energized.319-346... 

The H(2P) state is energetic by 10.2 eV with respect to the ground state and it has a lifetime of 1.60 nsec (32). The H(2P) state can be produced by irradiating (lowing ground state H atoms with the 1216 A resonance line, where the ground state atoms are made in a microwave discharge. 

Figure 13. Cartesian [center-of-mass (CM)] contour diagrams for NH+ produced from reaction of N+ with H2. Numbers indicate relative product intensity corresponding to each contour. Direction of N+ reactant beam is 0° in center-of-mass system. For clarity, beam profiles have been displaced from their true positions (located by dots and 0°). Tip of velocity vector of center of mass with respect to laboratory system is located at origin of coordinate system (+). Scale for production velocities in center-of-mass system is shown at bottom left of each diagram (a) reactant N+ ions formed by impact of 160-eV electrons on N2 two components can be discerned, one approximately symmetric about the center of mass and the other ascribed to N+(IZ3), forward scattered with its maximum intensity near spectator stripping velocity (b) ground-state N+(3/>) reactant ions formed in a microwave discharge in N2. Only one feature is apparent—contours are nearly symmetric about center-of-mass velocity.12 ...

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