H. Ogawa et al., ENERGY-LOSS OF 10 MEV AMU ATOMIC HELIUM IN CARBON/, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 132(1), 1997, pp. 36-40
Mean energy losses of 31.8 MeV neutral He-3 atoms penetrating through
thin carbon foils of 1.6-7.2 mu g/cm(2) were measured using a high-res
olution magnetic spectrograph. The measured particles are those entere
d into the carbon foil as He-3(0) and emerged from it as He-3(0). From
the attenuation measurement of He-3(0) in the foils, we can regard th
e measured energy losses as those of He-3(0) in a frozen charge stare.
The measured stopping power of carbon for 31.8 MeV He-3(0) is 58.2 +/
- 4.9 eV/mu g/cm(2). Including our previous data for other partially c
lothed ions of the same velocity, the projectile atomic number depende
nce of the screening effect due to the bound electrons is roughly repr
oduced by the theoretical predictions based on the Born approximation.
(C) 1997 Elsevier Science B.V.