Characterisation of a small electrode HPGe detector

Unsworth, C, Boston, AJ, Boston, HC ORCID: 0000-0003-0721-3458, Harkness-Brennan, LJ, Judson, DS, Nolan, PJ, Thomas, OS, Wright, JP, Adekola, AS, Colaresi, J
et al (show 2 more authors) (2019) Characterisation of a small electrode HPGe detector. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 927. 293 - 300.

[img] Text
CharacterisationOfSmallElectrodeHPGe_NIMA_2019_AcceptedManuscript.pdf - Accepted Version

Download (2MB)


© 2019 Elsevier B.V. Small electrode HPGe detectors in an inverted coaxial geometry are increasingly in use in applications where both high efficiency and excellent energy resolution are required. The unusual electric field configuration of these detectors results in extremely long charge collection times compared to planar and coaxial devices. In this work we have characterised such a detector using gamma-ray coincidence measurements and optimised an electric field simulation to reproduce the positional variation of detector response. We show that, alongside accurate crystal geometry and applied electric potential, a temperature correction is crucial to correctly determining appropriate charge carrier mobility parameters. This work will help to guide the future development of HPGE detectors for applications including radioactive waste assay, radio-isotope dating, and fundamental nuclear physics.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 14 Mar 2019 13:35
Last Modified: 01 Sep 2022 07:14
DOI: 10.1016/j.nima.2019.02.043