An electron-cooling device in the one MeV energy region

The project of an electron cooling device at 700 KeV electron kinetic energy will be reported. The single parts of the device will be described in detail. Finally, electron beam diagnostics and technical problems will be discussed

Correlated Λd pairs from the K-stop A →ΛdA’ reaction

Correlated Λd pairs emitted after the absorption of negative kaons at rest K − stopA→ΛdA in light nuclei 6Li and 12C are studied. Λ-hyperons and deuterons are found to be preferentially emitted in opposite directions. The Λd invariant mass spectrum of 6Li shows a bump whose mass is 3251 ±6 MeV/c2. The bump mass (binding energy), width and yield are reported. The appearance of a bump is discussed in the realm of the [ ¯K3N] clustering process in nuclei. The experiment was performed with the FINUDA spectrometer at DANE (LNF