Персона: Гуров, Юрий Борисович
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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 "Экзотические ядерные состояния"
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Гуров
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Юрий Борисович
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- ПубликацияОткрытый доступ8He spectroscopy in stopped pion absorption by 11B nuclei(2019) Chernyshev, B. A.; Gurov, Y. B.; Lapushkin, S. V.; Leonova, T. I.; Sandukovsky, V. G.; Чернышев, Борис Андреевич; Гуров, Юрий Борисович; Леонова, Татьяна Игоревна© Published under licence by IOP Publishing Ltd.Level structure of 8He has been studied in the reaction of stopped pion absorption by 11B nuclei 11B(π-,pd)X. The experiment was carried out at the LANL with a two-arm semiconductor spectrometer. The missing mass spectrum in the range 0 MeV < MM < 50 MeV has been described by the superposition of phase-space distributions and the six states of 8He. Parameters of these states have been compared with data of other experimental and theoretical works.
- ПубликацияОткрытый доступSearch for 10He in the stopped pion absorption 14C(π-, p 3He)X(2020) Sandukovsky, V. G.; Chernyshev, B.; Gurov, Y. B.; Lapushkin, S. V.; Leonova, T. I.; Schurenkova, T.; Telkushev, M. V.; Чернышев, Борис Андреевич; Гуров, Юрий Борисович; Леонова, Татьяна Игоревна; Щуренкова, Татьяна Дмитриевна© Published under licence by IOP Publishing Ltd.The formation of the 10He states was studied in the reaction of stopped pion absorption 14C(π-, p 3He)X. Measurements were carried out using two-Arm multilayer semiconductor spectrometer and "radioactive"target consisting of 76% 14C and 23% 12C. The contribution of uncontrolled impurities in the target was ≤ 1%. In order to determine the contribution of the 12C impurity measurements were performed on an isotope pure carbon 12C target. An indication on the excitation state with Ex ∼ 6 MeV (Er ∼ 7 MeV) was observed in missing mass spectrum of 14C(π-, p 3He)X reaction. Comparison with theoretical and experimental results obtained by other authors was performed.
- ПубликацияОткрытый доступHalo-like structure in He-7 nucleus(2020) Demyanova, A. S.; Ogloblin, A. A.; Chernishev, B. A.; Goncharov, S. A.; Gurov, Y. B.; Lapushkin, S. V.; Чернышев, Борис Андреевич; Гуров, Юрий БорисовичA study of the neutron structure of the ground state of He-7 has been performed by means of registration and analysis of the decay channels of the residual nuclei following absorption of stopped pions. In particular, the reaction Be-9 (pi(-),d)X have been investigated where X denotes any system with five neutrons and two protons - the constituencies of a H-7 nucleus. It was shown that the structure of H-7 is determined by correlations of two neutrons in the states He-6 (0(+)), He-6 (2(+)) and one neutron in the shell p(3/2). The He-4+3n structure is not manifested in the ground state of H-7. The obtained results are consistent with the known data on considerable mixture of configurations "He-6 in its ground and first excited states plus a neutron" in the ground state of H-7. Comparison of the diffraction components of the differential cross-sections of the charge-exchange reactions (t, He-3) measured on Li-6 and Li-7 allowed extracting the radius of particle-unstable nucleus H-7. The latter occurred to be approximately equal to those of He-6 and H-7. The obtained result indicates to existence of the halo-like structure in H-7.
- ПубликацияОткрытый доступSpectroscopy of 7He in stopped pion absorption(2020) Demyanova, A. S.; Ogloblin, A. A.; Sandukovsky, V. G.; Chernyshev, B. A.; Gurov, Y. B.; Lapushkin, S. V.; Leonova, T. I.; Чернышев, Борис Андреевич; Гуров, Юрий Борисович; Леонова, Татьяна Игоревна© 2020 Published under licence by IOP Publishing Ltd.Formation of the 7He heavy isotope was studied in the reactions of stopped pion absorption by light nuclei 9Be, 10,11B and 12,14C. Measurements were performed using the two-arm multilayer semiconductor spectrometer. Contrary to the results of other studies, we observed several narrow highly excited states (Ex > 16 MeV) of 7He. From the analysis of the continuous excitation spectrum in reactions 9Be(π-, d)X and 11B(π-, dd)X it was obtained first indication that the 4He+3n structure is not present in the ground state of 7He.