Antiproton slowing down inH[sub 2] and He and evidence of nuclear stopping power

Journal Article · Mon Jan 16 04:00:00 EST 1995 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.74.371· OSTI ID:6578295

Agnello, M; Belli, G; Bendiscioli, G; Bertin, A; Botta, E; Bressani, T; Bruschi, M; Bussa, M P; Busso, L; Calvo, D; Cereda, B; Cerello, P G; Cicalo, C; Corradini, M; Costa, S; De Castro, S; Donzella, A; Feliciello, A; Ferrero, L; Filippi, A ; Filippini, V; Fontana, A; Galli, D; Garfagnini, R; Giacobbe, B; Gianotti, P; Grasso, A; Guaraldo, C; Iazzi, F; Lanaro, A; Lodi Rizzini, E; Lucherini, V; Marcello, S; Marconi, U; Masoni, A; Minetti, B; Montagna, P; Morando, M; Nichitiu, F; Panzieri, D; Pauli, G; Piccinini, M; Puddu, G; Rossetto, E; Rotondi, A; Rozhdestvensky, A M; Saino, A; Salvini, P; Santi, L; Sapozhnikov, M G; Semprini Cesari, N; Serci, S; Spighi, R; Temnikov, P; Tessaro, S; Tosello, F; Tretyak, V; Usai, G L; Vecchi, S; Venturelli, L; Villa, M; Vitale, A; Zenoni, A; Zoccoli, A ^[1]

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1. Politecnico di Torino and Istituto Nazionale di Fisica Nucleare Sezione di Torino, I-10125 Torino (Italy) Dipartimento di Chimica e Fisica p

We report stopping powers of hydrogen and helium for antiprotons of kinetic energies ranging from about 0.5 keV to 1.1 MeV. The Barkas effect, i.e., a difference in the stopping power for antiprotons and protons of the same energy in the same material, shows up clearly in either of the gases. Moreover, below [approx]0.5 keV there is indirect evidence for an increase of the antiproton stopping power. This nuclear'' effect, i.e., energy losses in quasimolecular interactions, shows up in fair agreement with theoretical predictions.

• OSTI ID: 6578295
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 74:3; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANNIHILATION
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYONS
BASIC INTERACTIONS
CERN
CORRELATIONS
DATA
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
FLUIDS
GASES
HADRONS
HELIUM
HYDROGEN
INFORMATION
INTERACTIONS
INTERNATIONAL ORGANIZATIONS
KEV RANGE
KINETIC ENERGY
MATTER
MEV RANGE
MEV RANGE 01-10
NONMETALS
NUCLEI
NUCLEONS
NUMERICAL DATA
PARTICLE INTERACTIONS
RARE GASES
SLOWING-DOWN
STOPPING POWER