Evaluation of low-energy tailing parameters of a HPGe X-ray detector to be used in GUPIX software library for PIXE analysis

Summary, in English

Accurate description of the response function of X-ray detectors is important for quantitative PIXE analysis. For analytical description of low-energy tailing in PIXE spectra, the GUPIX approach was used, i.e. a combination of Hypermate type functions. The low-energy tailing parameters of a low-energy high purity germanium X-ray detector in the region 1.3-9.2 keV was determined by systematic fitting of X-ray spectra from thin MicroMatter standards. Except for the main Gaussian peak and germanium escape peaks, one shelf, one truncated shelf, one exponential function and KMM radiative Auger feature was applied to fit the spectral data collected with this low-energy Ge X-ray detector. The overall trend of different tail parameters shows similar characteristic as those for Si(Li) X-ray detectors used in this energy range, i.e. very strong tailing at low X-ray energies and a rapid fall off with increasing X-ray energy. The fitted parameters, as a function of X-ray energy, were then incorporated into the GUPIX library for PIXE analysis. (C) 2004 Elsevier B.V. All rights reserved.

• Author: Asad Shariff; Bengt Martinsson; Vaida Auzelyte; Mikael Elfman; Per Kristiansson; Klas Malmqvist; Christer Nilsson; Jan Pallon; Marie Wegdén
• Department/s: Nuclear physics
• Publishing year: 2004
• Language: English
• Pages: 110-114
• Publication/Series: Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
• Volume: 219-20
• Links: http://dx.doi.org/10.1016/j.nimb.2004.01.037
• Document type: Journal article
• Publisher: Elsevier
• Topic: Subatomic Physics
• Keywords: HPGe-detector; response function; PIXE; tailing parameter; GUPIX
• Status: Published
• Research group: Aerosol, Nuclear Physics; Nuclear Microprobe
• ISBN/ISSN/Other: ISSN: 0168-583X