Single-Proton States inBi209Corresponding to the Shell82<Z<126

Abstract

The reaction ${\mathrm{Pb}}^{208}(\alpha , t){\mathrm{Bi}}^{209}$ has been studied to investigate the single-proton states following $Z=82\mathrm{}$. The excitation energies and shell-model assignments for the observed states in ${\mathrm{Bi}}^{209}$ are as follows: ground state, $1h_{\frac{9}{2}}$; 0.90-MeV, $2f_{\frac{7}{2}}$; 1.61-MeV, $1i_{\frac{13}{2}}$; 2.84-MeV, $2f_{\frac{5}{2}}$; and 3.14-MeV, $3p_{\frac{3}{2}}$.