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 ≈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.

Antiproton Slowing-down In H-2 and He and Evidence of Nuclear Stopping Power

BOTTA, Elena;BRESSANI, Tullio;BUSSA, Maria Pia;BUSSO, Luigi;COSTA, Sergio;FERRERO, Livio;GARFAGNINI, Raffaello;GRASSO, Antonino;MARCELLO, Simonetta;PANZIERI, Daniele;
1995-01-01

Abstract

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 ≈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.
1995
74
371
374
M. AGNELLO;G. BELLI;G. BENDISCIOLI;A. BERTIN;E. BOTTA;T. BRESSANI;M. BRUSCHI;M. P. BUSSA;L. BUSSO;D. CALVO;B. CEREDA;P. G. CERELLO;C. CICALO;M. CORRADINI;S. COSTA;S. DECASTRO;A. DONZELLA;A. FELICIELLO;L. FERRERO;A. FILIPPI;V. FILIPPINI;A. FONTANA;D. GALLI;R. GARFAGNINI;B. GIACOBBE;P. GIANOTTI;A. GRASSO;C. GUARALDO;F. IAZZI;A. LANARO;E. L. RIZZINI;V. LUCHERINI;S. MARCELLO;U. MARCONI;A. MASONI;B. MINETTI;P. MONTAGNA;M. MORANDO;F. NICHITIU;D. PANZIERI;G. PAULI;M. PICCININI;G. PUDDU;E. ROSSETTO;A. ROTONDI;A. M. ROZHDESTVENSKY;A. SAINO;P. SALVINI;L. SANTI;M. G. SAPOZHNIKOV;N. S. CESARI;S. SERCI;R. SPIGHI;P. TEMNIKOV;S. TESSARO;F. TOSELLO;V. TRETYAK;G. L. USAI;S. VECCHI;L. VENTURELLI;M. VILLA;A. VITALE;A. ZENONI;A. ZOCCOLI
File in questo prodotto:
File Dimensione Formato  
PRL_74_1995_371.pdf

Accesso riservato

Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 223.08 kB
Formato Adobe PDF
223.08 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/107108
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 64
social impact