An investigation of the level structure of nitrogen-14 by the bombardment of carbon-13 with protons
Belote, Thomas A.
Doctor of Philosophy
States in N14 in the region of excitation energy between 10.6 and 12.2 Mev have been studied by means of the C 13(p,n)N13, C13(p,d)C12, and C13(p,p1)C13* reactions. The C13(p,n)N13 total cross section has been measured from threshold, Eplab = 3.236, to 5.2 Mev in 30-kev steps by measuring the activation of the N13(half life = 10.1 min). The differential cross sections for the C13(p,d)C 12 and C13(p,p1)C13* reactions have been taken at center of mass angles near thetacm = 90° and 160°. This data along with that of Kashy et al., of the elastically scattered protons from C13 have been analyzed. Reaction-particle widths for the 11.05 (1+), 11.240 (3 -), 11.30 (2-), 11.39 (1+), and 11.503 (3+) states assigned from the elastic scattering data have been determined. Resonances at Eplab = 4.50 Mev (Gamma = 140 kev) 4.58 (Gamma = 60), 4.76 (Gamma = 320) and 5.04 (Gamma = 320) corresponding to levels at 11.72, 11.80, 11.96 and 12.22 Mev with assignments of 1-, 2+, 2 -, and 3- have also been investigated. Reaction particle-widths for these states have also been determined.