EFFICIENCY CALIBRATION OF A SI(LI) DETECTOR IN THE LOW-ENERGY REGION USING ELECTRON BREMSSTRAHLUNG

Authors
TSCHISCHGALE J KUCHLER D LEHNERT U ZSCHORNACK G
Citation
J. Tschischgale et al., EFFICIENCY CALIBRATION OF A SI(LI) DETECTOR IN THE LOW-ENERGY REGION USING ELECTRON BREMSSTRAHLUNG, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 400(2-3), 1997, pp. 387-391
Citations number
12
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
400
Issue
2-3
Year of publication
1997
Pages
387 - 391
Database
ISI
SICI code
0168-9002(1997)400:2-3<387:ECOASD>2.0.ZU;2-R
Abstract
In the low-energy region the determination of the detector efficiency is complicated by the fact of nonavailability of certificated calibrat ion sources. To solve this problem the use of electron bremsstrahlung for determining the relative photon detection efficiency of a Si(Li) d etector in the low-energy range 0.5-19 keV is proposed. The calibratio n is based on energy dispersive measurements of electron bremsstrahlun g emitted by an X-ray tube. Model spectra are computed from thick-targ et bremsstrahlung spectra in a semiclassical approximation and from a physical model for the detector response. Model spectra are fitted to the measured spectra using a parametric adaptor term. Thereby, the err or of the determined detector efficiency is approximately 5%.