Figure 1

(a) Singles spectrum for the ${}^7\mathrm{Li}\left({}^3\mathrm{He},\alpha \right){}^6\mathrm{Li}$ reaction at $450\text{MeV}$ and at ${\theta }_{\alpha }=0°$ (thin solid curve). A spectrum obtained in coincidence with triton and ${}^3\mathrm{He}$ decay particles is shown by closed circles. See text for details. Error bars indicated are due to only statistical. The symbols of C and O denote peaks due to carbon and oxygen contaminations in the target, respectively. The long-dashed curve denotes the peak shape calculated with the Breit-Wigner formula for two resonances at $E_x=18\text{MeV}$ (dashed curve) and $22\text{MeV}$ (dot-dashed curve), respectively. The dotted curve is a Gaussian peak at $E_x=29\text{MeV}$ and with $\Gamma =10\text{MeV}$. The solid curve is the sum of all the resonances. (b) Two-dimensional scatter plot between $\alpha$ particles and $t∕{}^3\mathrm{He}$ decay particles. The triton and ${}^3\mathrm{He}$ decay particles were measured at ${\theta }_L=130°$. The abscissa and ordinate are the excitation energy in ${}^6\mathrm{Li}$ and the energy of decay particle, respectively. The solid curve shows the kinematical locus calculated for $t+{}^3\mathrm{He}$ binary decay.Reuse & Permissions

Figure 2

Angular correlations obtained at the excitation energies of $E_x=20.3$, 21.7, and $23.2\text{MeV}$ by making use of the singles data to obtain relative normalizations. The abscissa is the angle of particle emission in the center of mass frame of the residual nucleus ${}^6\mathrm{Li}$. The solid angles and emission angles of decaying particles were represented in the center of mass system of ${}^6\mathrm{Li}$. The fitting result is shown by a solid curve. See the text.Reuse & Permissions