The impulse approximation and some crude nuclear and hypernuclear wave functions are used to calculate cross sections for some reactions of the type ${\pi }^{+}+\mathrm{nucleus}\to K^{+}+\mathrm{hypernucleus}$ for incident ${\pi }^{+}$ laboratory energies in the range 0.55-1.0 GeV. Target nuclei considered were ${}_{}{}^4{}_{}{}^{}\mathrm{He}$, ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, and ${}_{}{}^{119}{}_{}{}^{}\mathrm{Sn}$. Cross sections (or cross sections per nucleon) were calculated for production of the ground states and some possible excited states of the resultant hypernuclei. Although some results are marginal, on the whole the calculated cross sections appear to be too small for this to be a useful production method for hypernuclei at the pion energies available at present meson factories.

NUCLEAR REACTIONS Production of hypernuclei, ${\pi }^{+}$ on ${}_{}{}^4{}_{}{}^{}\mathrm{He}$, ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^{119}{}_{}{}^{}\mathrm{Sn}$, $T_{\pi }=0.55-1.0\mathrm{}$ GeV.

• Received 19 February 1975

DOI:https://doi.org/10.1103/PhysRevC.12.507