A prototype Xe + 10% CH4 microstrip detector was used to study the K-edge discontinuity in the pulse-height distribution as a function of the energy of incident X-rays. The electronics used was such that a pulse-shape rejection could be made of K-fluorescence reabsorption in the detector. The measured jump at the K-edge was (169 ± 12)eV. It was also seen that Kα- and Kβ-decay channels produce different pulse heights for the same deposited energy. We find that the difference in energy between the calibration lines of the Kβ2- and the Kβ1.3-escape peaks is (93±12)eV whereas between the Kβ1.3 and the Kα-escape peaks' calibration the energy gap is (69±7)eV. Keywords: Astronomical and Space Research Instrumentation; Radiation Spectrometers and Spectroscopic Techniques; Radiation Detectors.
Linearity discontinuities in Xe-filled X-ray microstrip detectors
ZAVATTINI, Guido;FRONTERA, Filippo;GAMBACCINI, Mauro;PARESCHI, Giovanni
1997
Abstract
A prototype Xe + 10% CH4 microstrip detector was used to study the K-edge discontinuity in the pulse-height distribution as a function of the energy of incident X-rays. The electronics used was such that a pulse-shape rejection could be made of K-fluorescence reabsorption in the detector. The measured jump at the K-edge was (169 ± 12)eV. It was also seen that Kα- and Kβ-decay channels produce different pulse heights for the same deposited energy. We find that the difference in energy between the calibration lines of the Kβ2- and the Kβ1.3-escape peaks is (93±12)eV whereas between the Kβ1.3 and the Kα-escape peaks' calibration the energy gap is (69±7)eV. Keywords: Astronomical and Space Research Instrumentation; Radiation Spectrometers and Spectroscopic Techniques; Radiation Detectors.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
