Application of a pnCCD for energy-dispersive Laue diffraction with ultra-hard X-rays

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dc.authoridCONKA, TUBA/0000-0003-0671-3805
dc.contributor.authorSend, Sebastian
dc.contributor.authorAbboud, Ali
dc.contributor.authorWiesner, Nadja
dc.contributor.authorShokr, Mohammad
dc.contributor.authorKlaus, Manuela
dc.contributor.authorGenzel, Christoph
dc.contributor.authorConka-Nurdan, Tuba
dc.date.accessioned2025-02-20T08:42:16Z
dc.date.available2025-02-20T08:42:16Z
dc.date.issued2016
dc.departmentTürk-Alman Üniversitesien_US
dc.description.abstractIn this work the spectroscopic performance of a pnCCD detector in the ultra-hard energy range between 40 and 140 keV is tested by means of an energy-dispersive Laue diffraction experiment on a GaAs crystal. About 100 Bragg peaks were collected in a single-shot exposure of the arbitrarily oriented sample to white synchrotron radiation provided by a wiggler at BESSY II and resolved in a large reciprocal-space volume. The positions and energies of individual Laue spots could be determined with a spatial accuracy of less than one pixel and a relative energy resolution better than 1%. In this way the unit-cell parameters of GaAs were extracted with an accuracy of 0.5%, allowing for a complete indexing of the recorded Laue pattern. Despite the low quantum efficiency of the pnCCD (below 7%), experimental structure factors could be obtained from the three-dimensional data sets, taking into account photoelectric absorption as well as Compton scattering processes inside the detector. The agreement between measured and theoretical kinematical structure factors calculated from the known crystal structure is of the order of 10%. The results of this experiment demonstrate the potential of pnCCD detectors for applications in X-ray structure analysis using the complete energy spectrum of synchrotron radiation.
dc.description.sponsorshipBMBF Verbundforschung [05K13PS1]
dc.description.sponsorshipThis work was supported by BMBF Verbundforschung, project number 05K13PS1. We gratefully acknowledge the financial support.
dc.identifier.doi10.1107/S1600576715023997
dc.identifier.endpage233en_US
dc.identifier.issn1600-5767
dc.identifier.scopusqualityQ1
dc.identifier.startpage222en_US
dc.identifier.urihttps://doi.org/10.1107/S1600576715023997
dc.identifier.urihttps://hdl.handle.net/20.500.12846/1612
dc.identifier.volume49en_US
dc.identifier.wosWOS:000369389300026
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherInt Union Crystallography
dc.relation.ispartofJournal of Applied Crystallography
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250220
dc.subjectenergy-dispersive Laue diffractionen_US
dc.subjectX-ray structure analysisen_US
dc.subjectX-ray spectroscopyen_US
dc.subjectwhite synchrotron radiationen_US
dc.subjectpnCCDsen_US
dc.titleApplication of a pnCCD for energy-dispersive Laue diffraction with ultra-hard X-rays
dc.typeArticle

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