A new spectroscopic imager for X-rays from 0.5 keV to 150 keV combining a pnCCD and a columnar CsI(Tl) scintillator

作者：Schlosser D M^*; Hartmann R; Kalok D; Bechteler A; Abboud A; Shokr M; Conka T; Pietsch U; Strueder L

来源：Journal of Instrumentation, 2017, 12(04): P04009.

DOI：10.1088/1748-0221/12/04/P04009

• Gamma detectors (scintillators, CZT, HPG, HgI etc)
• Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)
• X-ray detectors
• Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc)

By combining a low noise fully depleted pnCCD detector with a columnar CsI(Tl) scintillator an energy dispersive spatial resolving detector can be realized with a high quantum efficiency in the range from below 0.5 keV to above 150 keV. The used scintillator system increases the pulse height of gamma-rays converted in the CsI(Tl), due to focusing properties of the columnar scintillator structure by reducing the event size in indirect detection mode (conversion in the scintillator). In case of direct detection (conversion in the silicon of the pnCCD) the relative energy resolution is 0.7% at 122 keV (FWHM = 850 eV) and the spatial resolution is less than 75 mu m. In case of indirect detection the relative energy resolution, integrated over all event sizes is about 9% at 122 keV with an expected spatial precision of below 75 mu m.

• 出版日期2017-4