${\mathrm{Sc}}^{47}$: This radioactive isotope has been reported to have a half-life of 2.62 days and to emit 1.1 Mev electrons. These observations are not confirmed. A new radioactive isotope has, however, been produced by bombarding calcium with alpha-particles and to some extent by bombarding calcium with deuteron and proton. It emits beta-rays of 0.46 Mev and has a half-life of 3.4 days. The assignment is made to ${\mathrm{Sc}}^{47}$.

${\mathrm{Sc}}^{48}$: This isotope has been produced by the reactions ${\mathrm{Ca}}^{48}\mathrm{}(p,n)\mathrm{}$, ${\mathrm{Ca}}^{48}\mathrm{}(d,2n)\mathrm{}$, ${\mathrm{Ti}}^{48}\mathrm{}(n,p)\mathrm{}$, and ${\mathrm{V}}^{51}(n,\alpha )$. From the ${\mathrm{V}}^{51}(n,\alpha )$ reaction gamma-rays of 1.33 Mev and beta-rays of 0.57 Mev were observed and from the ${\mathrm{Ca}}^{48}\mathrm{}(p,n)\mathrm{}$ reaction gamma-rays of 1.35 Mev and beta-rays of 0.57 Mev were observed. Relative saturation intensities have been calculated for ${\mathrm{Sc}}^{43}$, ${\mathrm{Sc}}^{44}$, ${\mathrm{Sc}}^{47}$, and ${\mathrm{Sc}}^{48}$ when produced by proton, deuteron, alpha-particle, and fast neutron bombardments. ${\mathrm{Sc}}^{48}$ was produced free of ${\mathrm{Sc}}^{44}$ by the ${\mathrm{V}}^{51}(n,\alpha )$ and the ${\mathrm{Ca}}^{48}\mathrm{}(p,n)\mathrm{}$ reactions. Electrons of 0.57 Mev and gamma-rays of 1.33 Mev were observed. ${\mathrm{Sc}}^{48}$ emits approximately 14 gamma-rays per electron. All reactions associated with the scandium region are schematically summarized in a nuclear transmutation chart.

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