Branching Ratios inC14andN14

Abstract

The ${\mathrm{Be}}^9({\mathrm{Li}}^7, d){\mathrm{C}}^{14}$ and ${\mathrm{B}}^{10}({\mathrm{Li}}^6, d){\mathrm{N}}^{14}$ reactions were used as sources of gamma-emitting excited states of ${\mathrm{C}}^{14}$ and ${\mathrm{N}}^{14}$. Three-parameter measurements of $E$, $\frac{\mathrm{dE}}{\mathrm{dx}}$, and $E_{\gamma }$ in 1024×1024×256-channel detail were used to identify deuteron groups and the gamma rays associated with them. Radiation from six bound levels in ${\mathrm{C}}^{14}$ and from eight bound levels in ${\mathrm{N}}^{14}$ was analyzed to give branching ratios. Results are generally in agreement with previous measurements where they have been made. Two unbound levels in ${\mathrm{N}}^{14}$ are found to gamma-decay in competition with proton decay.