Energy reconstruction of an n-type segmented inverted coaxial point-contact HPGe detector

Journal Article · Tue Jun 27 00:00:00 EDT 2017 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2017.06.036· OSTI ID:1436340

Salathe, M. ^[1]; Cooper, R. J. ^[1]; Crawford, H. L. ^[1]; Radford, D. C. ^[2]; Allmond, J. M. ^[2]; Campbell, C. M. ^[1]; Clark, R. M. ^[1]; Cromaz, M. ^[1]; Fallon, P. ^[1]; Hausladen, P. A. ^[2]; Jones, M. D. ^[1]; Macchiavelli, A. O. ^[1]; Wright, J. P. ^[3]

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1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
3. Univ. of Liverpool (United Kingdom)

We have characterized, for the first time, an n-type segmented Inverted Coaxial Point-Contact detector. This novel detector technology relys on a large variation in drift time of the majority charge carriers, as well as image and net charges observed on the segments, to achieve a potential γ-ray interaction position resolution of better than 1 mm. However, the intrinsic energy resolution in such a detector is poor (more than 20 keV at 1332 keV) because of charge (electron) trapping effects. We propose an algorithm that enables restoration of the resolution to a value of 3.44 0.03 keV at 1332 keV for events with a single interaction. The algorithm is based on a measurement of the azimuthal angle and the electron drift time of a given event; the energy of the event is corrected as a function of these two values.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: AC02-05CH11231; AC05-00OR22725
• OSTI ID: 1436340
• Alternate ID(s): OSTI ID: 1376546; OSTI ID: 1550209
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 868, Issue C; ISSN 0168-9002
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

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