Supersymmetric top decays

The supersymmetric decays of the top quark into charged Higgs plus bottom, $\text{thb}$, and into the supersymmetric partner of the top (${\text{wti}u}_1$) plus the lightest neutralino (${\text{wti}\chi }_1^0$), $\text{tstopneu}$, are discussed within the framework of the Minimal Supersymmetric Standard Model with radiatively induced breaking of the gauge group $SU(2)\times U(1)$. The possibility of detecting these decays at present, i.e. given the available bounds on supersymmetric parameters, is compared with the situation a Next $e^{+}{e}^{-}$ Linear Collider would face if supersymmetric particles were still undiscovered at LEP~II. The indirect implications for $\text{thb}$ and $\text{tstopneu}$ of a measurement of the bottom quark decay $\text{bsgamma}$ at the Standard Model level are taken into account. }}