The distorted-wave impulse approximation (DWIA) formalism for computing the cross sections in electroproduction of hypernuclei, used before for lighter ($p$-shell and $sd$-shell) systems, is utilized in studying electroproduction on heavier targets such as ${}^{52}\mathrm{Cr}$, and ${}^{208}\mathrm{Pb}$. First, the effects from kaon distortion and kinematics are reexamined and then results for the heavy targets are discussed in view of various forms of the $\mathrm{\Lambda }N$ effective interaction, the elementary amplitude, and kinematics. Apparent sensitivity of the hypernucleus excitation spectra to various forms of the $\mathrm{\Lambda }N$ effective interaction is shown. Predictions of the excitation spectrum in electroproduction of ${}_{\mathrm{\Lambda }}{}^{208}\mathrm{Tl}$ are also given in kinematics of the experiment E12-20-013 in preparation at Jefferson Lab.

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• Hypernuclei & mesic nuclei
• Lepton induced nuclear reactions
• Models & methods for nuclear reactions
• Nuclear reactions
• Optical, coupled-channel & distorted wave models