Fabrication and Performance Tests of a Segmented P-Type HPGe Detector

TL;DR

This paper reports on the fabrication and testing of a segmented p-type HPGe detector, demonstrating its ability to distinguish multi-segment events with a 59% recognition rate for gamma-ray interactions.

Contribution

It introduces a novel segmentation method for p-type HPGe detectors using diamond saw cutting and etching, and evaluates its performance with gamma-ray sources.

Findings

Segmented detector recognizes 59% of multi-segment events.

Segmentation improves event discrimination capabilities.

Fabrication process successfully creates segmented structure.

Abstract

A p-type HPGe detector has been segmented by cutting, with a diamond saw, and etching six circumferential grooves through the Li-diffused dead layer. The degree of segmentation was tested with the 88 keV gamma rays from a well-collimated source of 109Cd. The fraction of events, recognized as occurring in more than one segment, and rejected from the energy interval 2038 +/- 5 keV, was measured as 0.59.