Direct pair production in heavy-ion--atom collisions

Journal Article · Tue Feb 01 00:00:00 EST 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.27.680· OSTI ID:6049868

Anholt, R; Jakubassa-Amundsen, D H; Amundsen, P A; Aashamar, K

Direct pair production in approx.5-MeV/amu heavy-ion--atom collisions with uranium target atoms is calculated with the plane-wave Born approximation and the semiclassical approximation. Briggs's approximation is used to obtain the electron and positron wave functions. Since pair production involves high momentum transfer q from the moving projectile to the vacuum, use is made of a high-q approximation to greatly simplify the numerical computations. Coulomb deflection of the projectile, the effect of finite nuclear size on the elec- tronic wave functions, and the energy loss by the projectile exciting the pair are all taken into account in these calculations.

• Research Organization: Department of Physics, Stanford University, Stanford, California 94305
• OSTI ID: 6049868
• Journal Information: Phys. Rev. A; (United States), Vol. 27:2
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ION-ATOM COLLISIONS
PAIR PRODUCTION
URANIUM
BORN APPROXIMATION
CROSS SECTIONS
ELECTRONS
MEV RANGE 01-10
MOMENTUM TRANSFER
POSITRONS
ACTINIDES
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ATOM COLLISIONS
COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
INTERACTIONS
ION COLLISIONS
LEPTONS
METALS
MEV RANGE
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena