[en] We have measured the production cross sections for ²³³Th and ²³¹Th from the bombardment of ²³⁸U with ³He ions at 46-, 53-, and 60-MeV at the Brookhaven 60-in. isochronous cyclotron. We have also attempted to observe the decay of ²³³Ac produced via ²³⁸U(³He,⁸B) or equivalent reactions using 61 MeV ³He ions by first separating thorium from actinium and then performing chemical purifications on the second thorium sample into which the actinium has decayed. In the four experiments we performed, three gave results consistent with the β half-life of ²³³Ac somewhat longer than 120 s and the production cross section from this target-projectile combination in the order of 1 to 2 μb