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A user interface that provides the means for scheduling an experiment and controlling its performance is described. The current state of a spectrometer, the programs, and the experimental results can now be presented on the Internet as dynamically formed protocols and graphs. After giving a password, an experiment may be controlled via the Internet. The client can use the Internet without the need for any applied programs. The software package is designed for experiments in the field of condensed matter and nuclear physics and is ready for immediate use.

We developed a new method for measuring γ-ray energies in the internal calibration of a radioactive source under investigation. The measurements were carried out with the spectrometer of delayed coincidences and an optical delay line. This method allows the energies of the reference peak and the γ-ray peak under investigation to be compared, even if they are close or coincide. The possibility of precise γ-ray energy measurements is illustrated with60Co and154Eu isotopes.