[en] A pulse generator is described, which is particularly suitable for investigating disturbances in nuclear spectrometry caused by pile-up effects. The pulse generator provides a statistically distributed pulse train controllable in rate and height. (author)

[en] In order to obtain the double digital spread in high resolution nuclear spectrometry, two biased amplifiers were linked in parallel mode to the 10 V-input of a 2k-ADC. The arrangement works like a hybrid (1 bit scale - 11 bits Wilkinson) converter. A careful adjustment of the two bias levels (approximately 0V and approximately 6V) and the post-amplification (approximately 2) delivered a good linearity of the 4k-spectrum. (author)

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[en] The installation of a multi-sample beta-gamma coincidence spectrometer in an underground laboratory with a rock covering of 47 m yielded further background reduction by factors of between 10 (at 2 MeV) and about 4 (below 1 MeV). In silicon samples Fe can be measured by neutron activation analysis with a detection limit of 40 pg. (author) 7 refs.; 3 figs

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[en] The microprocessor-based 4096-channel-memory (single stand by crate) allows the parallel coupling of two Ge(Li)-gamma spectrometers via DMA (4 μs dead time) and a programmed input (ca. 150 μs dead time), the accumulation of 32 K counts per channel and the free definition of ROI's. The software organizes the versatile use of low-price periphery (oscilloscope, line printer, key board) and carries out the quantitative evaluation of the spectra. The device has been applied in low- and high-level spectrometry and as a general purpose microprocessor. (author)

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[en] In comparison to normal gamma spectrometry the application of X-γ coincidence spectrometry improves the detection limit for most of EC-decaying radionuclides. The described arrangement is suitable for low-level measurements of EC-decaying nuclides with atomic numbers higher than 30. (author)