Nuclear Reactions Induced by the Nitrogen Bombardment of Boron-11, Fluorine, Aluminum, Silicon, Phosphorus, and Chlorine

Abstract

Cross sections as a function of bombarding energy were obtained from thick target yields for twelve reactions induced by 27.5-MeV nitrogen ions accelerated in the ONRL 63-in. Cyclotron. Materials containing the following six elements were bombarded: boron, fluorine, aluminum, silicon, phosphorus, and chlorine. The irradiated materials were $\gamma$ counted and the radioactive products were identified by their characteristic $\gamma$ rays and half-lives. The following nuclides were observed: ${\mathrm{Ne}}^{23}$ from ${\mathrm{B}}^{11}$; ${\mathrm{P}}^{30}$ from ${\mathrm{F}}^{19}$; ${\mathrm{K}}^{38}$ from ${\mathrm{Al}}^{27}$; ${\mathrm{Cl}}^{34m}$ and ${\mathrm{K}}^{38}$ from silicon; ${\mathrm{Sc}}^{43}$ from ${\mathrm{P}}^{31}$; ${\mathrm{Sc}}^{43}$, ${\mathrm{Sc}}^{44}$, ${\mathrm{Sc}}^{44m}$, ${\mathrm{Ti}}^{45}$, and ${\mathrm{V}}^{47}$ from ${\mathrm{Cl}}^{35}$; and ${\mathrm{Cr}}^{49}$ from ${\mathrm{Cl}}^{37}$. The observed cross sections are in general agreement with those obtained from other heavy-ion induced reactions at these energies. For the target nucleus ${\mathrm{Cl}}^{35}$ it was possible to identify five products, and experimental cross-section ratios were compared to the theoretical ratios determined from Monte Carlo evaporation calculations.