Excitation Functions of Bismuth and Lead

Cross sections for the reactions ${\mathrm{Bi}}^{209}({\mathrm{He}}^4, 2n){\mathrm{At}}^{211}$, ${\mathrm{Bi}}^{209}({\mathrm{He}}^4, 3n){\mathrm{At}}^{210}$, and ${\mathrm{Bi}}^{209}({\mathrm{He}}^4, 4n){\mathrm{At}}^{209}$ were measured with helium ions of energies from 20.6 to 43.3 Mev. Cross sections for the reactions ${\mathrm{Bi}}^{209}(d, p)\mathrm{RaE}$, ${\mathrm{Bi}}^{209}(d, n){\mathrm{Po}}^{210}$, ${\mathrm{Bi}}^{209}(d, 2n){\mathrm{Po}}^{209}$, ${\mathrm{Bi}}^{209}(d, 3n){\mathrm{Po}}^{208}$, and ${\mathrm{Pb}}^{208}(d, p){\mathrm{Pb}}^{209}$ were measured with deuterons of energies from 6.3 to 21.5 Mev. Some information is presented on the ${\mathrm{Bi}}^{209}({\mathrm{He}}^4, t){\mathrm{Po}}^{210}$ reaction. A half-life of 7.23±0.04 hr was measured for ${\mathrm{At}}^{211}$. The ${\mathrm{Bi}}^{209}(d, 3n){\mathrm{Po}}^{208}$ threshold energy is 12.0±0.3 Mev (center-of-mass system). The compound nucleus reaction cross sections are compared with the predictions of the Jackson model, and good agreement is obtained. The ($d, n$) and ($d, p$) stripping cross sections are discussed briefly.