On-line control system for acquisition of the annihilation photon angular distribution spectra

The on-line system for acquisition of the annihilation photon angular distribution spectra controlled by the ''DZ-28 Elektronika'' computer, allowing one to fix basic angular spectrum parameters (coincidences, incidental coincidence background, by-channel loadings) in machine-readable form (on magnetic tape and punched tape), is described. It is possible to set an arbitrary measuring time for each spectrum point that permits to optimize the experiment procedure. The system programming simplicity makes it flexible that is necessary for the investigation of different classes of substances. The unitized system structure makes it possible to increase its functional abilities. The control may be realized using different computers by means of the corresponding interfaces