Energy resolution improvement in room-temperature CZT detectors

TL;DR

This paper introduces new methods and a novel preamplifier design to significantly enhance the energy resolution of room-temperature CZT detectors, achieving results comparable to or better than pixel detectors.

Contribution

The paper presents a new preamplifier design and data analysis techniques that improve energy resolution in room-temperature CZT detectors, including standard and Frisch collar crystals.

Findings

Achieved 1.9% energy resolution with collar detectors at 662 keV.

Achieved 0.8% energy resolution with eV-CAPture Plus crystal at 662 keV.

Demonstrated energy resolution comparable or superior to pixel detectors.

Abstract

We present methods to improve the energy resolution of single-channel, room-temperature Cadmium-Zinc-Telluride (CZT) detectors. A new preamplifier design enables the acquisition of the actual transient current from the crystals and straightforward data analysis methods yield unprecedented energy resolution for our test-detectors. These consist of an eV-CAPture Plus crystal as standard and 1 cm cube Frisch collar crystals created in-house from low-grade coplanar grid detectors. Energy resolutions of 1.9% for our collar detectors and 0.8% for the eV crystal at 662 keV were obtained. The latter compares favourably to the best existing energy resolution results from pixel detectors.