Experience of teaching system automatic projection (SAPR) Kомpas-3d

В статье приведено описание опыта преподавания графической системы САПР Компас-3D.In article the description of experience of teaching of graphic system Kompas-30 is resulted

The collinear cluster tri-partition (CCT) of

Results of two different experiments for the study of fission of 252Cf (sf) events in coincidence with neutrons are reported. Two time-of-flight-energy (TOF-E detectors systems have been used. The fission fragment masses were obtained in a double arm coincidence set-up, where the missing mass in the binary decay is used to characterise ternary fission as a collinear cluster tri-partition (CCT). The 3He filled neutron counters have been arranged so as to detect principally neutrons emitted from an isotropic source in the laboratory frame. The fission events connected to the larger experimental neutron multiplicities show a wide range in the missing-mass spectrum, down to $\alpha$ -particles, carbon and oxygen isotopes. These are linked with magic nuclei in the binary mass-mass correlations of the fission fragments. These neutron gated data are virtually free from background events from scattered binary fission fragments. The ungated spectra are compared to those of the previous data from our previous article (Eur. Phys. J. A. 45, 29 (2010)), the observed structures agree well with the manifestations of the collinear cluster tri-partition of 252Cf (sf) observed earlier. Several new families of the CCT modes are observed

Collinear cluster tri-partition of

Experimental results in favour of the existence of a new type of cluster decay called “collinear cluster tri-partition”, CCT, are presented. They are based on two different experiments with binary coincidences and measurements of the masses and energies of the two fragments, as well as using in one of the experiments observables sensitive to the nuclear charge of the fission fragments. A relatively high yield of the CCT-effect (more than 10-3per binary fission) is likely due to the favourable Q -values (more positive than binary) and is expected due to a collective motion through very elongated (hyper-deformed) pre-scission shapes of the mother system. The process is considered to result from a sequential process, where a heavy cluster (lead as in the case of known cluster radioactivity) is replaced by pairs of two lighter clusters such as the magic isotopes of Sn/Ni or Sn/Ge