Fission Studies of Thorium, Uranium, and Plutonium Isotopes with (t, pf) Reactions

Experimental results are reported on fission probabilities and fragment angular correlations for ($t, \mathrm{pf}$) reactions on ${}_{}{}^{230}{}_{}{}^{}\mathrm{Th}$, ${}_{}{}^{232}{}_{}{}^{}\mathrm{Th}$, ${}_{}{}^{234}{}_{}{}^{}\mathrm{U}$, ${}_{}{}^{236}{}_{}{}^{}\mathrm{U}$, ${}_{}{}^{238}{}_{}{}^{}\mathrm{U}$, ${}_{}{}^{238}{}_{}{}^{}\mathrm{Pu}$, ${}_{}{}^{240}{}_{}{}^{}\mathrm{Pu}$, and ${}_{}{}^{242}{}_{}{}^{}\mathrm{Pu}$ targets. Systematic variations in the experimental results are used to qualitatively discuss properties of the fission barrier and low-lying transition-state spectra for these even-even nuclei.