Fission studies with 140 MeV $\mathit{\alpha }$-Particles

Binary fission induced by 140 MeV $\alpha$-particles has been measured for ${}^{\mathrm{n}\mathrm{a}\mathrm{t}}$Ag, ${}^{139}$La, ${}^{165}$Ho and ${}^{197}$Au targets. The measured quantities are the total kinetic energies, fragment masses, and fission cross sections. The results are compared with other data and systematics. A minimum of the fission probability in the vicinity $Z^2\mathrm{/}A=24$ is observed.