scholarly journals A hollow cathode arc as a high intensity beam source for ground state and metastable noble gas atoms in the eV translational energy range

1982 ◽  
Vol 15 (5) ◽  
pp. 573-579 ◽  
Author(s):  
P G A Theuws ◽  
H C W Beijerinck ◽  
N F Verster ◽  
D C Schram
Keyword(s):  
Energy Range ◽  
Hollow Cathode ◽  
Ground State ◽  
High Intensity ◽  
Noble Gas ◽  
Translational Energy ◽  
Beam Source ◽  
Cathode Arc

Charge Transfer Between CO22+ and Ar or Ne at Collision Energies 3-10 eV

2003 ◽  
Vol 68 (1) ◽  
pp. 178-188 ◽  
Author(s):  
Libor Mrázek ◽  
Ján Žabka ◽  
Zdeněk Dolejšek ◽  
Zdeněk Herman
Keyword(s):  
Charge Transfer ◽  
Excited States ◽  
Ground State ◽  
Scattering Method ◽  
Translational Energy ◽  
Centre Of Mass ◽  
Energy Distributions ◽  
Zener Model ◽  
Beam Scattering ◽  
Product Ions

The beam scattering method was used to investigate non-dissociative single-electron charge transfer between the molecular dication CO22+ and Ar or Ne at several collision energies between 3-10 eV (centre-of-mass, c.m.). Relative translational energy distributions of the product ions showed that in the reaction with Ar the CO2+ product was mainly formed in reactions of the ground state of the dication, CO22+(X3Σg-), leading to the excited states of the product CO2+(A2Πu) and CO2+(B2Σu+). In the reaction with Ne, the largest probability had the process from the reactant dication excited state CO22+(1Σg+) leading to the product ion ground state CO2+(X2Πg). Less probable were processes between the other excited states of the dication CO22+, (1∆g), (1Σu-), (3∆u), also leading to the product ion ground state CO2+(X2Πg). Using the Landau-Zener model of the reaction window, relative populations of the ground and excited states of the dication CO22+ in the reactant beam were roughly estimated as (X3Σg):(1∆g):(1Σg+):(1Σu-):(3∆u) = 1.0:0.6:0.5:0.25:0.25.

Diamond Growth by Dual Hollow Cathode Arc Chemical Vapor Deposition

1997 ◽  
Vol 36 (Part 2, No. 10B) ◽  
pp. L1406-L1409 ◽  
Author(s):  
Gou-Tsau Liang ◽  
Franklin Chau-Nan Hong
Keyword(s):  
Chemical Vapor Deposition ◽  
Hollow Cathode ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Diamond Growth ◽  
Cathode Arc

A study of argon metastable generation in a hollow cathode arc

1984 ◽  
Vol 62 (2) ◽  
pp. 141-147
Author(s):  
Marc Fortin ◽  
Paul Meubus
Keyword(s):  
Hollow Cathode ◽  
Potential Energy Curve ◽  
Arc Discharge ◽  
Rare Gas ◽  
Energy Curve ◽  
Helium Mixture ◽  
Wavelength Scale ◽  
Gas Molecules ◽  
Cathode Arc ◽  
Radiation Measurements

A study is made of the intense spectroscopic continuum obtained between 120 and 180 nm for an argon–helium mixture (15% He) deexcitation, the emission originating from a hollow cathode arc discharge operated at 2900 K and a calculated pressure of 20 kPa. The deexcitation of the excimers toward the repulsive fundamental level gives way to an ultraviolet (UV) continuum, which is a characteristic of the potential energy curve for these molecules and whose position in the wavelength scale depends on the temperature of the hollow cathode. This continuum is identified as the second Tanaka continuum.Absolute radiation measurements have been made with a gold coated photocathode in order to determine the excited rare gas molecules [Formula: see text] concentration, which is in the order of 7 × 1013 cm−3.Such concentrations are high and seem to be related to the generation means used (hollow cathode).The spectroscopic results obtained with the indicated specific argon–helium mixture imply a major contribution of a precursor of the type (He–Ar)+ for the [Formula: see text] metastable formation.

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