Abstract
The absolute differential cross section for the elastic scattering of oxygen by gaseous targets of helium, nitrogen, and neon and of carbon by nitrogen were measured from about 4 to ∼20 degrees in the center-of-mass system. The energy of the incident heavy ions was ∼10 Mev per atomic mass unit. The ratio of the elastic cross section to the Coulomb cross section exhibits diffraction-like oscillations which damp out as increases from ∼1 to ∼4. The results are compared with the predictions of a simple diffraction model, a sharp-cutoff model, and a modified-cutoff model. Reasonably good agreement is obtained in predicting the angular position of the maxima and minima, but not the absolute cross section. The modified-cutoff model appears to apply only if is greater than about 2.5. The value of found for the -Ne scattering is 25% greater than for the remaining three reactions.
- Received 13 February 1961
DOI:https://doi.org/10.1103/PhysRev.122.1842
©1961 American Physical Society