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The formation of deeply-bound antikaonic $K^-/\bar{K}^0$ nuclear states bynuclear ($K^-$, $N$) reactions is investigated theoretically within adistorted-wave impulse approximation (DWIA), considering the isospin propertiesof the Fermi-averaged $K^-+ N \to N + \bar{K}$ elementary amplitudes. Wecalculate the formation cross sections of the deeply-bound $\bar{K}$ states bythe ($K^-$, $N$) reactions on the nuclear targets, $^{12}$C and $^{28}$Si, atincident $K^-$ lab momentum $p_{K^-}$ = 1.0 GeV/c and $\theta_{\rm lab} =0^{\circ}$, introducing a complex effective nucleon number $N_{\rm eff}$ forunstable bound states in the DWIA. The results show that the deeply-bound$\bar{K}$ states can be populated dominantly by the ($K^-$, $n$) reaction viathe total isoscalar $\Delta T=0$ transition owing to the isospin nature of the$K^-+ N \to N + \bar{K}$ amplitudes, and that the cross sections described by${\rm Re}N_{\rm eff}$ and ${\rm Arg}N_{\rm eff}$ enable to deduce the structureof the $\bar{K}$ nuclear states; the calculated inclusive nucleon spectra for adeep $\bar{K}$-nucleus potential do not show distinct peak structure in thebound region. The few-body $\bar{K}\otimes [NN]$ and $\bar{K}\otimes [NNN]$states formed in ($K^-$, $N$) reactions on $s$-shell nuclear targets, $^3$He,$^3$H and $^4$He, are also discussed.

Isospin Properties of ($K^-$, $N$) Reactions for the Formation of Deeply-bound Antikaonic Nuclei