Single ionization of helium by 40--3000-keV antiprotons

Journal Article · Fri Jun 01 00:00:00 EDT 1990 · Physical Review, A (General Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevA.41.6536· OSTI ID:6696880

Andersen, L H; Hvelplund, P; Knudsen, H; Moller, S P; Pedersen, J O.P.; Tang-Petersen, S; Uggerhoj, E ^[1]; Elsener, K ^[2]; Morenzoni, E ^[3]

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1. Institute of Physics, University of Aarhus, DK-8000 Aarhus C (Denmark)
2. CERN, CH-1211 Geneva (Switzerland)
3. PSI, CH-5234 Villigen (Switzerland)

Measurements of single-ionization cross sections for antiproton impact on helium atoms are reported for impact energies ranging from 40 keV to 3 MeV. It is found that the measured cross sections are in good agreement with recent theoretical estimates based on the continuum-distorted-wave approximation. From a comparison with similar proton data, the ratio between antiproton and proton results is obtained. The energy dependence of this ratio is compared with various theoretical estimates and explained as a result of polarization and binding effects.

• OSTI ID: 6696880
• Journal Information: Physical Review, A (General Physics); (USA), Journal Name: Physical Review, A (General Physics); (USA) Vol. 41:11; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANTINUCLEON BEAMS
ANTIPARTICLE BEAMS
ANTIPROTON BEAMS
ATOM COLLISIONS
BEAMS
COLLISIONS
CROSS SECTIONS
DATA
ELEMENTS
ENERGY DEPENDENCE
ENERGY RANGE
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
INFORMATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
KEV RANGE
KEV RANGE 10-100
KEV RANGE 100-1000
MEV RANGE
MEV RANGE 01-10
NONMETALS
NUMERICAL DATA
RARE GASES