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The results of the photometric observations of comet 29P/Schwassmann-Wachmann 1 are ana lyzed. The comet demonstrates substantial activity at heliocentric distances larger than 5 AU, i.e., outside the water ice sublimation zone. The CCD images of the comet were obtained in wideband R filters at the 6 meter telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS) and at the 2 meter Zeiss 2000 telescope of the Peak Terskol Observatory. The processing of the images with special digital filters allowed the active structures (jets) to be distinguished in the dust coma of the comet. With the cross correlation method, the rotation period of the cometary nucleus was determined as 12.1 ± 1.2 and 11.7 ± 1.5 days for the observations taken in December 2008, and February 2009, respectively. The probable causes of the difference in the estimates of the rotation period of the cometary nucleus obtained by different authors are discussed.

The process of fusion-fission of superheavy nuclei with Z= 102-122 formed in the reactions with 22Ne, 26Mg, 48Ca , 58Fe, and 86Kr ions at energies near and below the Coulomb barrier has been studied. The experiments were carried out at the U-400 accelerator of the Flerov Laboratory of Nuclear Reactions (JINR) using a time-of-flight spectrometer of fission fragments CORSET and a neutron multi-detector DEMON. As a result of the experiments, mass and energy distributions of fission fragments, fission and quasi-fission cross sections, multiplicities of neutrons and y-quanta, and their dependence on the mechanism of formation and decay of compound superheavy systems have been studied.

Bestrahlt man Perfluorketon (Ia) oder (Ib) bei 20°C mit einer Quarzlampe, so wird CO abgespalten und man erhält quantitativ Perfluorderivate (IIa) bzw. (IIb).