Observation of CharacteristicγRadiation from the (K−, π−γ) Reaction on Light Nuclei

Characteristic $\gamma$ radiation produced in the reaction ${}_{}{}^7{}_{}{}^{}\mathrm{Li}(K^{-}, {\pi }^{-}\gamma )$ at a kaon momentum of 1.7 GeV/c has been analyzed with Ge(Li) detectors. A transition at 789±4 keV is a candidate for a new hypernuclear $\gamma$-ray line. The intensity of this transition corresponds to a c.m. forward-angle production cross section of 48±12 μb for the reaction ${}_{}{}^7{}_{}{}^{}\mathrm{Li}(K^{-}, {\pi }^{-}\gamma )$. Several $\gamma$-ray lines observed with ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, Be, B, C, and O targets could be ascribed to ordinary nuclear transitions.