Formation of protonium in collisions of antiprotons with H and H

Journal Article · Tue Sep 01 04:00:00 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), Journal Name: Phys. Rev. A; (United States) Vol. 36:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

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