Персона: Пятков, Юрий Васильевич
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Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Руководитель научной группы «Исследование многотельных распадов тяжелых ядер с низкой энергией возбуждения»
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Пятков
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Юрий Васильевич
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- ПубликацияОткрытый доступAdditional arguments in favor of true quaternary fission of low excited actinides(2019) Kamanin, D. V.; Alexandrov, A. A.; Alexandrova, I. A.; Goryainova, Z. I.; Pyatkov, Y. V.; Tomas, A. V.; Пятков, Юрий Васильевич© 2019, Eurasian Journal of Physics and Functional Materials. All Rights Reserved.Specific linear structures in the region of a big missing mass in the fission fragments mass correlation distributions were revealed due to effective cleaning of this region from the background linked with scattered fragments. One of the most pronounced structures looks like a rectangle bounded by the magic nuclei. The fission events aggregated in the rectangle show a very low total kinetic energy. We propose possible scenario of forming and decay of the multi-cluster pre-scission configuration decisive for the experimental findings.
- ПубликацияОткрытый доступObservation of cluster structure of fission fragments(2019) Strekalovsky, A. O.; Kamanin, D. V.; Alexandrov, A. A.; Alexandrova, I. A.; Pyatkov, Y. V.; Пятков, Юрий Васильевич© Published under licence by IOP Publishing Ltd.The manifestation of a new original effect appearing at crossing of the metal foils by fission fragments is reported. The effect takes place predominantly at front impacts. The obtained results suggest that a fragment from conventional binary fission is borne in shape-isomer state which looks like a di-nuclear system with magic core.
- ПубликацияОткрытый доступStrong indication of true quaternary fission of 252Cf (sf)(2019) Kamanin, D. V.; Alexandrov, A. A.; Alexandrova, I. A.; Goryainova, Z. I.; Pyatkov, Y. V.; Tomas, A. V.; Пятков, Юрий Васильевич© Published under licence by IOP Publishing Ltd.In our previous publications we discussed possible physical scenario standing behind rectangular-like structures in the fission fragments mass-correlation distributions from 252Cf(sf). The rectangle is bounded by the known magic nuclei such as 68Ni, 84Se and others. The fission events aggregated in the rectangle show extremely low total kinetic energies. Previously only decay mode with two Ni clusters in the exit channel was discussed. A more complete analysis is presented which gives additional arguments in favour of true quaternary fission of 252Cf (sf).
- ПубликацияОткрытый доступClusterization in heavy cold nuclei(2019) Kamanin, D. V.; Pyatkov, Yu. V.; Пятков, Юрий Васильевич© Published under licence by IOP Publishing Ltd.A cluster is broadly understood to be an object which keeps its identity in a larger scale system. Manifestations of clustering can be revealed in very different size systems from exotic nuclei to galaxies. In our work we search for cluster effects in low energy fission of heavy nuclei. In the series of experiments carried out with the spectrometers based both on the gas filled (FOBOS spectrometer and its modifications) detectors and mosaics of solid-state detectors (setups at the beams of alpha-particles and deuterons, COMETA spectrometer) using the "missing mass" method and with the direct detection of three decay partners, we have discovered a new type of the ternary decay of heavy nuclei dubbed by us "collinear cluster tri-partition (CCT)". The most interesting aspects of both the original methodic used and the physics of the effect observed are discussed in the presented report.