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The part of results obtained on multichannel installation created forresearches of various processes, including alpha and beta decays, in acombination to recording of environment parameters, is represented. Theinstallation works more than 13 years practically continuously. At the countrate measurements of the Co-60 and Sr-90 Y-90 beta sources the rhythmic changeswith amplitude 0.3 % from average magnitude and period 1 year, and up to 0.02 %with period about one month are detected. Count rate rhythmic changes of alphasources Pu-239 are not detected. The results obtained by us are compared tosimilar results of other researchers. The argumentation of critics is analyzed.

Researches of alpha and beta radioactivity at long-term observations