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HK: Fachverband Hadronen und Kerne

HK 67: Poster Session

HK 67.49: Poster

Thursday, March 19, 2009, 14:00–16:00, Audi-Max

Characterization of Detector Systems for Photofission Studies^† — •P.G. Thirolf¹, M. Csatlos², L. Csige², M. Fujiwara³, J. Gulyas², D. Habs¹, A. Krasznahorkay², N. Pietralla⁴, D. Savran⁴, and T. Tajima¹ — ¹LMU München, Garching, Germany — ²Inst. Nucl. Res. of the Hungarian Acad. of Sciences, Debrecen, Hungary — ³Res. Center f. Nucl. Phys., Osaka University, Japan — ⁴IKP, TU Darmstadt, Germany

A brilliant source of photon beams in the X-ray - MeV range can be realized by (coherent) Compton backscattering of laser photons off a dense relativistic electron mirror generated from thin (few nm) diamond-like carbon foils [1]. Highly monochromatic photon beams can be expected with unprecedented photon flux intensities of up to 10¹² photons/pulse at 8 MeV photon energy, operated at a laser repetition rate of 10 Hz. Such photon beams will offer new perspectives for photon-induced nuclear structure studies, e.g. in the second and third minima of actinides. Preparing for photofission studies in actinides, Parallel Plate Avalanche gas detector (PPAC) arrays have been commissioned, each equipped with a stack of 15-25 large area fissile actinide targets (^235,238U, ²³²Th), where the actinide targets simultaneously act as detector electrodes. Properties of the detector systems will be presented, which will be included in first experiments at the Darmstadt NEPTUN tagger facility or the NEW SUBARU facility in Osaka.

[1] D. Habs et al., Appl. Phys. B93 (2008) 349.

^†Supported by the DFG Cluster of Excellence MAP (Munich-Centre for Advanced Photonics).