Formation of protonium in collisions of antiprotons with H and H

Journal Article · Tue Sep 01 00:00:00 EDT 1987 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.36.2024· OSTI ID:6407932

Cohen, J S

Cross sections for formation of protonium (pp-bar) in low-energy collisions of antiprotons with hydrogen atoms (H) and negative hydrogen ions (H ) are calculated using the classical-trajectory Monte Carlo (CTMC) method. Full four-body dynamics is performed for p-bar+H . Previously unpredicted differences between p-bar+H and p-bar+H collisions, stemming from the dynamics of the weakly bound electron in H , are exhibited. A maximum protonium formation cross section of nearly 2 AS for p-bar+H is found, smaller than previous theoretical estimates, but the reaction window is found to extend to higher energies. The electron stripping cross section for p-bar+H collisions is also calculated and yields results in agreement with our previous three-body CTMC calculation and with a very recent experimental determination. The implications of these results for experiments with corotating beams of p-bar and H are discussed.

• Research Organization: Theoretical Division, Los Alamos National Laboratory, University of California, Los Alamos, New Mexico 87545
• OSTI ID: 6407932
• Journal Information: Phys. Rev. A; (United States), Vol. 36:5
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANTIPROTONS
ION-ATOM COLLISIONS
HYDROGEN
ION-ION COLLISIONS
HYDROGEN IONS 1 MINUS
PROTONIUM
PRODUCTION MECHANISMS
CROSS SECTIONS
EXPERIMENT PLANNING
MONTE CARLO METHOD
ANIONS
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ATOM COLLISIONS
ATOMS
BARYONS
CHARGED PARTICLES
COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HADRONIC ATOMS
HADRONS
HYDROGEN IONS
ION COLLISIONS
IONS
NONMETALS
NUCLEI
PLANNING
640303* - Atomic
Molecular & Chemical Physics- Positronium
Muonium
& Muonic & Mesic Atoms & Molecules