engleski

Stopping power of helium gas for ^9Be ions from 2 to 31 MeV

The stopping power of helium gas for ^9Be ions from 2 to 31 MeV is experimentally determined using an indirect method. The residual energy of the ^9Be beam as a function of the gas thickness is measured and the stopping power determined by differentiating the thickness-energy curve. The results are compared with predictions of semi-empirical codes SRIM-2003 and MSTAR. Our data are in better agreement with the MSTAR calculations. The elastic scattering excitation function for the system ^9Be+alpha, extracted using the thick target technique and our stopping power data, is in excellent agreement with the ones measured directly confirming the quality of our data.

Stopping power ; ^9Be ions ; Helium gas ; Resonance scattering

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