Abstract
Inelastic scattering of ${\mathrm{N}}^{14}$ by carbon was studied at 27.3 Mev using two surface-barrier counters to detect both the scattered and the recoil particle in coincidence. The cross section for excitation of ${\mathrm{C}}^{12}$ to the first excited state (4.43 Mev) varies only slightly with angle and averages about 0.5 mb/sr. This is about 15 times greater than the theoretical cross section for Coulomb excitation. The cross sections for scattering to the second, third, and fourth excited states in ${\mathrm{N}}^{14}$ were found to be only 15 to 25% of that for the 4.43-Mev excitation in ${\mathrm{C}}^{12}$. Scattering to the first excited state of ${\mathrm{N}}^{14}$ was not observed, which is consistent with conservation of isotopic spin.
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