A solid ionization chamber operated at 20 Mk
| Autor: | J Chaumont, J.P. Ponpon, Antoine Barbier, L Stab, D. Yvon, I. Prostakov, M. Chapellier, G. Chardin, D. L'Hote, X-F. Navick |
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| Přispěvatelé: | Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Lorgeril, Jocelyne |
| Jazyk: | angličtina |
| Rok vydání: | 1996 |
| Předmět: |
Physics
Nuclear and High Energy Physics Photon Physics::Instrumentation and Detectors 010308 nuclear & particles physics Time evolution chemistry.chemical_element Germanium Trapping 01 natural sciences Space charge Spectral line chemistry [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] Electric field 0103 physical sciences Ionization chamber [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] Atomic physics 010306 general physics Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 1996, 370, pp.213-214 |
| ISSN: | 0168-9002 |
| Popis: | We have built a germanium “solid ionization chamber” with aluminium evaporated electrodes. We obtained very low leakage current complete charge collection at 23 mK. However, we found that the spectra evolved as a function of time. To investigate this effect, the detector has been irradiated with the 43, 87, 105, and 662 keV photons of 155 Eu and 137 Cs and we analyzed this time evolution taking into account the different penetration depths of the photons. We also studied the influence of the “history” of the detector (the previous polarization voltages). We found that the electric field due to the built-in space charge (presumably induced by carriers trapping) plays an important role, and that the time evolution cannot be explained solely by the trapping of the carriers generated by each photon. |
| Databáze: | OpenAIRE |
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