A high resolution, high sensitivity Compton polarimeter

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Abstract

A solid state Compton effect polarimeter consisting of three coaxial Ge(Li) detectors has been constructed for use in measuring gamma-ray linear polarization angular correlations. The polarimeter has been calibrated for polarization sensitivity using sources of known linear polarization, the result being in reasonable agreement with a Monte Carlo calculation of the sensitivity. Comparison is made with similar devices in the literature.

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The work was supported by the Bundesministerium für wissenschaftliche Forschung. The numerical calculations were done on the IBM 7090 and IBM 370 computers of the Gessellschaft für Mathematik und Datenverarbeitung in Bonn.

Present address: Department of Physics, University of Manitoba, Winnipeg, Canada.

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The authors would like to express their appreciation to Dr G. Kumbartzki and Mrs Hodde for the drifting and mounting of the Ge(Li) detectors. Particular thanks are due to Dr P. Herzog who performed the Monte Carlo R-value calculations for us. We would also like to thank Dr K. Krien who suggested the construction of the apparatus and contributed helpfully in the earlier stages, as well as Prof. E. Bodenstedt for his interest and support throughout the work.

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