The p 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 p 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 p stoppings in the simplest gases (He, H2 ) and in solid targets below some MeV.
Antiproton stopping power in He in the energy range 1-900 keV and the Barkas effect
LODI RIZZINI, Evandro;BIANCONI, Andrea;CORRADINI, Maurizio;DONZELLA, Antonietta;LEALI, Marco;VENTURELLI, Luca;ZURLO, Nicola;
2004-01-01
Abstract
The p 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 p 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 p stoppings in the simplest gases (He, H2 ) and in solid targets below some MeV.File in questo prodotto:
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