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Dresden 2000 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 13: Postersitzung / Instrumentation und Anwendungen

HK 13.29: Poster

Thursday, March 23, 2000, 10:15–12:45, B 117

Pulse shape analysis of Ge-detectors — •J. Gerl1, M. Kaspar1, Th. W. Elze2, I. Kojouharov1, H. Schaffner1, Ch. Schlegel1, A. Surowiec1, and H.J. Wollersheim11GSI, Darmstadt — 2Univ. Frankfurt

Pulse shape distributions of Segmented Clover detectors have been measured as a function of the impact position of γ-rays. Precise simulation calculations employing 3d FEM electrical field calculations and including subtle effects like the velocity dependence of the charge carriers on the crystal orientation quantitatively agreed with the measured data. Several analysis algorithms to extract the position information from the pulse shapes have been investigated. Position resolution of 4-12 mm (FWHM) and 1-40 mm (FWTM) were obtained. The simulations revealed that the large FWTM values are caused mainly by Compton scattering inside the crystal.

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