| Zugriffsnummer | 29016 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | The X-ray response of CdZnTe detectors to be used as future spectroscopic detectors for X-ray astronomy |
| Autor(in); Institution |
Kraft, S.; Space Science Department of the European Space Agency, Noordwijk, THE NETHERLANDS
Bavdaz, M.; Space Science Department of the European Space Agency, Noordwijk, THE NETHERLANDS
Castelletto, B.; Space Science Department of the European Space Agency, Noordwijk, THE NETHERLANDS
Peacocl, A.; Space Science Department of the European Space Agency, Noordwijk, THE NETHERLANDS
Scholze, Frank; 7.12, Röntgenradiometrie, PTB-Berlin
Ulm, Gerhard; 7.1, Photonenradiometrie, PTB-Berlin
Gagliardi, M.-A.; Metorex International Oy, Espoo, FINLAND
Nenonen, S.; Metorex International Oy, Espoo, FINLAND
Tuomi, T.; Helsinki University of Technology, Espoo, FINLAND
Juvonen, M.; Helsinki University of Technology, Espoo, FINLAND
Rantamäki, R.; Helsinki University of Technology, Espoo, FINLAND
|
| Quelle/Jahr | Nuclear Instruments and Methods in Physics Research A: 418 (1998), 2/3 |
| ISSN | 0168-9002 |
| DOI | |
| Verlag | Amsterdam: North-Holland |
| Freie Schlagworte | Compound semiconductors ; CdZnTe ; High-Resolution spectroscopy ; synchrotron radiation ; X-ray astronomy |
| Zusammenfassung | The next generation of X-ray astrophysics missions may well extend the energy range beyond the current limit of about 10 keV studied by the existing X-ray Astrophysics space missions such as ASCA or future missions such as AXAF and XMM to be launched in the next few years. To address with a high degree of sensitivity the astrophysical problems associated with X-ray emission in the X-ray band from 0.2 to 100 keV a significant extension of the capabilities of focusing X-ray optics and imaging broad band hard X-ray detectors will be required. Future missions such as INTEGRAL, BASIS and EXIST will make use of CdZnTe or CdTe detectors for imaging spectroscopy down to about 5 keV with a spectral resolution between 3% and 7% at 100 keV. This is about a factor of 10 away from what is theoretically possible and mainly caused by the poor crystal quality. In this paper experimental results on the study of the X-ray response of CdZnTe detectors are presented. The detector response to photons with energies between 1 and 5 keV has been investigated using synchrotron radiation and a preliminary model to describe the detector response developed. The limitations on the energy resolution, due to incomplete charge collection and spatial non-uniformities, are presented based on the detailed mapping of the energy response of a detector exposed to highly monochromatised synchrotron radiation. At higher energies results have been obtained using a 241Am radioactive source and an electron cyclotron resonance source so as to establish the detector performance and overall response to medium- and higher-energy X-ray photons up to 60 keV. Based on these results the performance of the detectors are compared with Si(Li) and HPGe solid-state detectors. |
Zitierung
Kraft, S., Bavdaz, M., Castelletto, B., Peacocl, A., Scholze, F., Ulm, G., Gagliardi, M.-A., Nenonen, S., Tuomi, T., Juvonen, M., & Rantamäki, R. (1998). The X-ray response of CdZnTe detectors to be used as future spectroscopic detectors for X-ray astronomy. Nuclear Instruments and Methods in Physics Research A, 418(2/3). http://doi.org/10.1016/s0168-9002(98)00639-1