(a) Schematic drawing of the main components of the GERDA experiment. (b) GERDA phase I results. In the top panel is shown the combined energy spectrum from all enriched Ge detectors without (open histogram) or with (filled histogram) PSA. The lower panel shows the region used for the background interpolation. In the upper panel, the spectrum zoomed to is superimposed with the expectations (with PSD selection) based on the central value of KDHK [79, 80], = yr (red dashed line) and with the GERDA phase I result yr at 90% C.L. (blue solid line). (Figure and description from [126].)
