The stopping power in helium from 1 keV kinetic energy is evaluated. Contrary to the effect observed around and below the maximum, Obelix data indicate a stopping power higher than that for proton, the difference being of the order of 15±5% at ≈700 keV. The result contributes to assert the fundamental difference between stoppings in the simplest gases (He, H2) and in solid targets below some MeV.
Antiproton stopping power in He in the energy range 1-keV - 900-keV and the Barkas effect
BARGIOTTI, MARIANNE;BERTIN, ANTONIO;DE CASTRO, STEFANO;DONA', ROBERTO;FABBRI, LAURA;FACCIOLI, PIETRO;GRIMALDI, FILIPPO;MASSA, IGNAZIO GIACOMO;PICCININI, MAURIZIO;SEMPRINI CESARI, NICOLA;VILLA, MAURO;VITALE, ANTONIO;ZOCCOLI, ANTONIO;
2004
Abstract
The stopping power in helium from 1 keV kinetic energy is evaluated. Contrary to the effect observed around and below the maximum, Obelix data indicate a stopping power higher than that for proton, the difference being of the order of 15±5% at ≈700 keV. The result contributes to assert the fundamental difference between stoppings in the simplest gases (He, H2) and in solid targets below some MeV.File in questo prodotto:
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