Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 49: Instrumentation

HK 49.9: Vortrag

Dienstag, 5. März 2013, 18:45–19:00, WIL-C207

UF₆ as a Detector Gas for Fission Studies* — •Christian Eckardt¹, Joachim Enders¹, Martin Freudenberger¹, Alf Göök², Peter von Neumann-Cosel¹, Andreas Oberstedt^3,4, and Stephan Oberstedt² — ¹Institut für Kernphysik, Technische Universität Darmstadt — ²Institute for Reference Materials and Measurements,JRC, European Commission, 2440 Geel, Belgium — ³Akademin för naturvetenskap och teknik, Örebro Universitet, 70182 Örebro, Sweden — ⁴Fundamental Fysik, Chalmers Tekniska Högskola, 41296 Göteborg, Sweden

A Frisch-grid ionization chamber has been built to test a mixture of argon with gaseous UF₆ and to study its properties as a counting gas. We present first results using increasing mass fractions of ²³⁸UF₆ mixed into argon. The drift velocity of the electrons increases with the content of ²³⁸UF₆, while a good signal quality and energy resolution of the ionization chamber is preserved.

Using uranium hexafluoride in the detector gas may give access to experiments where extremely high luminosity is required in combination with good angular and energy and/or mass resolution. Examples comprise the investigation of spontaneous fission of ²³⁸U, the study of parity non-conservation in the fission process, or precision measurements of fission fragments with good resolution using tagged photons in the entrance channel.

* Work supported by DFG through SFB 634, by the state of Hesse through the LOEWE center HIC for FAIR, and through the GSI-TU-Darmstadt cooperation.