Antiproton stopping power in hydrogen below 120 keV and the Barkas effect

The simultaneous measurement of the spatial coordinates and times of [ital [bar p]]s annihilating at rest in a H[sub 2] target at very low density [rho] ([rho]/[rho][sub 0][lt]10[sup [minus]2], [rho][sub 0] being the STP density) gives the possibility of evaluating the behavior of the [ital [bar p]]...

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Veröffentlicht in:	Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 1993-05, Vol.47 (5B), p.4517-4520
Hauptverfasser:	ADAMO, A, AGNELLO, M, BUSSA, M. P, BUSSO, L, CALVO, D, CAPPONI, M, CICALO, C, CORRADINI, M, COSTA, S, D'ANTONE, I, DE CASTRO, S, D'ISEP, F, BALESTRA, F, DONZELLA, A, FALOMKIN, I. V, FAVA, L, FELICIELLO, A, FERRERO, L, FILIPPINI, V, GALLI, D, GARFAGNINI, R, GASTALDI, U, GIANOTTI, P, BELLI, G, GRASSO, A, GUARALDO, C, IAZZI, F, LANARO, A, LODI RIZZINI, E, LOMBARDI, M, LUCHERINI, V, MAGGIORA, A, MARCELLO, S, MARCONI, U, BENDISCIOLI, G, MARON, G, MASONI, A, MASSA, I, MINETTI, B, MORANDO, M, MONTAGNA, P, NICHITIU, F, PANZIERI, D, PAULI, G, PICCININI, M, BERTIN, A, PIRAGINO, G, POLI, M, PONTECORVO, G. B, PUDDU, G, RICCI, R. A, ROSSETTO, E, ROTONDI, A, ROZHDESTVENSKY, A. M, SALVINI, P, SANTI, L, BOCCACCIO, P, BONAZZOLA, G. C, BRESSANI, T, BRUSCHI, M
Format:	Artikel
Sprache:	eng
Schlagworte:	663620 > Physics of Radiations Other Than Neutrons-- (1992-) ANNIHILATION ANTIBARYONS ANTIMATTER ANTINUCLEI ANTINUCLEONS ANTIPARTICLES ANTIPROTONS Atomic and molecular collision processes and interactions ATOMIC AND MOLECULAR PHYSICS BARYONS BASIC INTERACTIONS CERN LEAR COLLISIONS ELECTROMAGNETIC INTERACTIONS ELEMENTARY PARTICLES ELEMENTS ENERGY RANGE Exact sciences and technology FERMIONS HADRONS HYDROGEN INTERACTIONS KEV RANGE MATTER MOLECULE COLLISIONS NONMETALS NUCLEAR PHYSICS AND RADIATION PHYSICS NUCLEI NUCLEONS PARTICLE INTERACTIONS Physics RESOLUTION Scattering of atoms, molecules and ions STOPPING POWER TIME RESOLUTION TIMING PROPERTIES 664300 > Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
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Beschreibung
Zusammenfassung:	The simultaneous measurement of the spatial coordinates and times of [ital [bar p]]s annihilating at rest in a H[sub 2] target at very low density [rho] ([rho]/[rho][sub 0][lt]10[sup [minus]2], [rho][sub 0] being the STP density) gives the possibility of evaluating the behavior of the [ital [bar p]] stopping power in H[sub 2] at low energies (below 120 keV). It is different from that of protons (the Barkas effect). Moreover, it is shown that a rise at low-energy values ([approx lt]1 keV) is needed to agree with experimental data.
ISSN:	1050-2947 1094-1622
DOI:	10.1103/PhysRevA.47.4517