Positronium-beam production and positronium scattering from molecular hydrogen

1996 ◽  
Vol 74 (7-8) ◽  
pp. 518-520 ◽  
Author(s):  
A. J. Garner ◽  
G. Laricchia
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
Conversion Efficiency ◽  
Molecular Hydrogen ◽  
Positron Beam ◽  
Gas Pressure ◽  
Beam Production ◽  
Positronium Beam ◽  
Incident Positron

The efficiency with which a positron beam is converted into an positronium beam, via charge exchange in molecular hydrogen and argon gases was investigated. At certain incident positron energies, molecular hydrogen was found to be over three times as efficient as argon for this purpose. The beam conversion efficiency was investigated with respect to both gas pressure and energy. Preliminary measurements for the total cross section of Ps scattering from molecular hydrogen are also presented.

Charge-exchange and total cross section in π−p interactions at high energies

1963 ◽  
Vol 4 (3) ◽  
pp. 164-166 ◽  
Author(s):  
G. Bellini ◽  
E. Fiorini ◽  
A. Orkin-Lecourtois
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
High Energies

Measurement of the Total Cross Section for Symmetric Charge Exchange in Helium from 400-2000 eV

1969 ◽  
Vol 177 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Stephen W. Nagy ◽  
William J. Savola ◽  
Edward Pollack
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Charge Exchange

Pion-proton charge-exchange scattering near 2.0 GeV/ c

1966 ◽  
Vol 289 (1419) ◽  
pp. 513-520 ◽  
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Charge Exchange ◽  
Cross Sections ◽  
Thick Plate ◽  
Charge Exchange Reaction ◽  
Total Cross Sections ◽  
Proton Charge ◽  
Exchange Scattering ◽  
Polynomial Expansions

Results based on an analysis of 25% of the pictures obtained from a measurement of the charge-exchange reaction π - p → n 0 n with thick-plate spark chambers are given. Differential and total cross sections for charge-exchange scattering were obtained at five momenta centred about the T = 1/2 resonance found at 2.07 GeV/ c in the π - p total cross section. In the vicinity of the resonance the total cross section is falling smoothly, and the higher coefficients of Legendre polynomial expansions show no significant variation with momentum. From this it is concluded that there is either a complicated interference of several states at the resonance or that the resonance is in a relatively high partial wave and is mainly inelastic.

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