FLNR SCIENTIFIC AND TECHNICAL COUNCIL MEETINGS AND SCIENTIFIC SEMINARS|
13.05.2016 - FLNR Scientific and Technical Council Meeting N3, 15-30 Flerov Lab Conference Hall
11.05.2016 - FLNR Scientific Seminar "Detectors for high-precision measurement in nuclear physics experiments", 15-30 Flerov Lab Conference Hall.
GSI, Helmholtz Association, Darmstadt, Germany
GSI/FAIR, JINR, MSU, RIKEN accelerator setups give the unique possibilities for the study of nuclear structure and nuclear reactions already now. In the nearest future the high-intensity radioactive beams will make it possible to study the new areas in nuclide diagrams which is of key importance for understanding of nuclear matter and nuclear astrophysics.
Experiments with short-lived ion beams imply as a rule precise measurement of coordinate, time of flight and charged particles energy loses. Various types of detectors, reading electronics, data analysis methods as well as the importance of stable ion beam testing of detectors will be discussed here.
11.05.2016 - FLNR CAP Scientific Seminar, "Diode-like "canonical" nanopore: latent track structure, etchant diffusion and osmotic effect define its geometry at different stages of evolution", 11-30 Flerov Lab Conference Hall.
Flerov Laboratory of nuclear reactions JINR
a GSI, Darmstadt, Germany
Detailed consideration is given to the question of nanopore formation and evolution behavior in the process of asymmetric etching of heavy ion tracks in polyethylene terephthalate film.
Conductometric methods and high-resolution scanning electron microscopy technique were applied in experimental part of this work. It's shown that a pore form changes considerably during chemical etching undergoing "funnel-like", "conical" and "bullet-like" stages. It was discovered for the first time that the osmotic effect plays the main role in formation of channel longitudinal profile during asymmetric etching.
Semi-quantitative model is suggested. It describes convection-diffusion transport of electrolyte in asymmetric nanopore during its evolution. Discovering of osmotic effect changes a lot the understanding of asymmetric etching mechanism used for formation of diode-like nanopores which are used as molecular sensors and in other nanotechnological applications.