Synthesis and self-assembly of novel fluorous cationic amphiphiles with a 3,4-dihydro-2(1H)-pyridone spacer

The synthesis of fluorous (highly fluorinated) 3,4-dihydro-2(1H)-pyridone-5-carboxylate cationic amphiphiles have been described, where the dihydropyridone serves as a spacer and either a pyridinium bromide or a triphenylphosphonium bromide form the polar cationic head group. The in water self-assembled aggregates have been observed by atomic force microscopy (AFM) and dynamic light scattering (DLS).     

Study of anomalous subbarrier fission of Th-232 in the lead body of the SVZ-100 lead slowing-down neutron spectrometer

Anomalous fission of Th-232 was twice studied at the SVZ-100, in 2003 and after the formation of hydroxide films on the surface of lead blocks, in 2005. After the formation of these films, the Th-232 fission cross section in the region of short slowing down times decreased by a factor of 140 to 0.3 mbarn which is 200 times larger than the values determined using neutron time-of-flight spectrometers (TFSs) to energies of 700 keV. The explanation of previously unknown features of neutron properties in Lead Slowing-down Spectrometers, previously published by A. A. Bergman, is presented.