Formation of ground and excited states of antihydrogen
Differential and integrated cross sections for the formation of antihydrogen by the impact of intermediate-energy (20--500 keV) antiprotons on positronium are calculated using the first Born approximation. The calculations are carried out for the formation of antihydrogen in ground and various excited electronic states (n = 1--3) when positronium, the target atom, is in the ground state, and for the formation of antihydrogen in the ground state when the positronium is in various excited electronic states (n = 1--2). The 1/n/sup 3/ behavior for the capture cross sections is used to calculate the total (that is, all states added together) integrated cross sections. The cross sections for the formation of antihydrogen presented here are obtained from those for the formation of positronium by the impact of positrons on hydrogen atoms by using charge invariance and the principle of detailed balance.
- Research Organization:
- Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48202
- OSTI ID:
- 5161742
- Journal Information:
- Phys. Rev. A; (United States), Vol. 37:11
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANTIMATTER
PRODUCTION
ANTIPROTONS
ION-ATOM COLLISIONS
HYDROGEN
POSITRONIUM
BORN APPROXIMATION
KEV RANGE 10-100
KEV RANGE 100-1000
TOTAL CROSS SECTIONS
ANTIBARYONS
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ATOM COLLISIONS
BARYONS
COLLISIONS
CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
HADRONS
ION COLLISIONS
KEV RANGE
NONMETALS
NUCLEI
NUCLEONS
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory
640303 - Atomic
Molecular & Chemical Physics- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules
640304 - Atomic
Molecular & Chemical Physics- Collision Phenomena