Abstract
Due to the large Compton background from intense gamma lines the usefulness of the Ge(Li)-detector for the investigation of neutron capture gamma ray spectra between 500 and 2000 keV is restricted to the determination of strong gamma lines. By placing the Ge(Li)-detector in the reflected beam from a single crystal spectrometer this background can be completely suppressed within a variable energy interval. This combination has been tested on the complex gamma yield from thermal neutron capture in 167Er. When using the Ge(Li)-detector as a photo effect spectrometer gamma rays up to about 1500 keV have been detected. The energy resolution of the combined spectrometer, using this particular Ge(Li)-detector is better than that of double flat and curved crystal spectrometers above about 700 keV. Recent developments in solid state detector techniques will appreciably lower this limit.
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