Angular distribution of fast protons from singly and doubly ionizing collisions with He

Journal Article · Mon May 16 04:00:00 EDT 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.60.2026· OSTI ID:5161280

Kamber, E Y; Cocke, C L; Cheng, S; Varghese, S L

Angular distributions of 3--9-MeV protons scattered in singly and doubly ionizing collisions with He have been measured. A sharp shoulder is seen at 0.55 mrad, a feature attributed to binary encounters between the projectile protons and quasifree target electrons. The ratio of double to single ionization of He is found to be nearly independent of scattering angle between 0.25 and 0.55 mrad and to have a value near 2% substantially lower than the ratio found in photoionization producing fast ejected electrons with the same energies.

• Research Organization: J. R. Macdonald Laboratory Physics Department, Kansas State University, Manhattan, Kansas 66506
• OSTI ID: 5161280
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 60:20; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ATOM COLLISIONS
BARYONS
CHARGE STATE
COLLISIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
FLUIDS
GASES
HADRONS
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
MEV RANGE
MEV RANGE 01-10
NONMETALS
NUCLEONS
PROTONS
RARE GASES