Excitation functions for the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ + ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$ system have been measured for the elastic, inelastic, alpha particle, and ${}_{}{}^8{}_{}{}^{}\mathrm{Be}$ exit channels from $E_{\mathrm{c}.\mathrm{m}.\mathrm{}}=10\mathrm{} \mathrm{to} 15$ MeV. Resonances with widths of approximately 800 keV were identified at center-of-mass energies of 11.2, 11.5, 12.6, 13.8, and 14.5 MeV.

NUCLEAR REACTIONS Measured $\frac{d\sigma }{d\Omega }$ for $E_{\mathrm{c}.\mathrm{m}.\mathrm{}}=10\mathrm{} \mathrm{to} 15$ MeV for ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$(${}_{}{}^9{}_{}{}^{}\mathrm{Be}$, ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$)-${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ (g.s., 4.43 MeV) at ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}\simeq 100° \mathrm{to} 151°$, ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$(${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^8{}_{}{}^{}\mathrm{Be}$)${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$ at ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}\simeq 13° \mathrm{to} 75°$, and ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^9{}_{}{}^{}\mathrm{Be}, \alpha ){}_{}{}^{17}{}_{}{}^{}\mathrm{O}$ at ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}\simeq 19° \mathrm{to} 70°$. Determined energies and widths of resonant enhancements.

• Received 15 June 1978

DOI:https://doi.org/10.1103/PhysRevC.18.2622