A method and apparatus for detecting gamma-rays is provided, wherein the gamma-ray detector apparatus includes a plurality of detector elements arranged in a stacked configuration. Each of the plurality of detector elements may include, a detector wafer (202) having at least one anode (206) separated from a cathode (208) via a wafer material, wherein the wafer material includes a wafer material thickness d, and a wafer interface, wherein the wafer interface is electrically connected to the at least one anode.
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