A. On the structure of physical vacuum and a new interaction in Nature (Theory, Experiment and Applications), Nova Science, NY, 2000. 13. <...> Preliminary results of 60Co -decay rate change long-term experimental investigation in 2010 Yu. <...> Baurov (junior) Central Research Institute of Machinery, 4 Pionerskaya str., Korolev, Moscow region, 141070, Russia E-mail: Baurov@mail.ru V. B. Dunin, V. V. Tikhomirov, S. V. Sergeev Joint Institute for Nuclear Researches, Dubna, Moscow region, 141980, Russia This paper provides the preliminary results from 2010 February-August long-term experimental study of 60Co -decay rate changes measured with the use of scintillation detectors on basis of LaBr3 crystals. <...> The experimental procedure was based on coincident records of 1.117 and 1.332 MeV accompanying the 60Co -quanta with energies -decay. <...> The data were processed by the statistical Kolmogoroff-Smirnoff s criterion. <...> In April the results have shown an excess over the 1 % significance level in the maximum difference between the theoretical uniform and experimental irregular -quanta distributions in the course of 24 hours' observation. <...> A brief comparison of the result obtained with the earlier observational data for changes in the radioactive elements given. -decay rate is PACS: 06.30.-k Keywords: -decay, 60, -quantum, decay rate, change. <...> Приведены предварительные результаты длительного экспериментального исследования изменений в скорости β-распада 60Со с февраля по август 2010 г. с использованием сцинтилляционных детекторов на основе кристаллов LaBr3 и методики на совпадение наблюдения с энергиями 1,117 и 1,332 МэВ, сопровождающих р-распад 60Со. <...>