Differential cross sections have been measured for the elastic scattering of N 14 from C 12 , N 14 from N 14 , and C 12 from C 12 to a relative precision of about 5%, and an absolute accuracy of 15%. Incident energies of nominally 10 Mev/amu were employed, and an angular range was covered from approximately 4° to 24° in the center-of-mass system. The use of solid-state detectors rendered energy resolution of the order of 1.5%. Theoretical cross sections calculated from both the simple-diffraction model and the sharp-cutoff model were fitted to the experimental data, giving interaction radii for the three reactions of 6.44, 6.68, and 6.23 fermi, respectively. * Work performed under the auspices of the U. S. Atomic Energy Commission.
The light output of Nal(Tl) was measured as a function of energy for ions of He 4 , B 10 , B 11 , C 12 , N 14 , O 16 , F 19 , and Ne 20 from approximately 1.0 to 10.0 Mev/nucleon. The particle energy was varied with absorbing foils and the degraded beam analyzed in a magnetic spectrometer. Light output becomes linear with energy above approximately 6 Mev/amu. There appears to be an odd-even incident charge effect in the saturation value of the differential efficiency of fluorescence, dL/dE.
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