A radiation detector with improved performance includes a probe and a first detector element constructed from planar semiconductor material in the probe. The detector further includes a second detector element constructed from planar semiconductor material in the probe. The detector further includes a focal point located outside of the probe. The detector further includes a circuit in communication with the detector elements. The first and second detector elements face the focal point and have the same solid angle relative to the focal point. The detector elements generate signals in response to incident radiation. The circuit receives the signals generated by the detector elements.
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