Abstract
Excitation functions, production yields and radionuclidic purities are described for 201Tl production by the 203 Tl(p,3n) 201 Pb→ 205 Tl and 205 Tl(p,5n) 201 Pb→ 201 Tl nuclear reactions. The yields (Ci g −1cm 2/μA-hr) of the parent 201Pb(9.4 hr), as well as the radiocontaminants 200Pb(21.5 hr), 202 m Pb (3.62 hr), 203Pb(52.1 hr) and 204 m Pb(1.115 hr) were measured by irradiating a stack of thin natural Tl foils with protons from the 76-in isochronous cyclotron at the Crocker Nuclear Laboratory (CNL). The 201Tl thick-target yield (mCi/μA hr) was calculated for different target thicknesses and corresponding incident proton energies. The excitation functions for the 203 Tl(p,3n) 201 Pb and the 205 Tl(p,5n) 201 Pb reactions were measured in the 15–60-MeV energy range.
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