Search for 2p decay of the first excited state of Ne17

P. G. Sharov, A. S. Fomichev, A. A. Bezbakh, V. Chudoba, I. A. Egorova, M. S. Golovkov, T. A. Golubkova, A. V. Gorshkov, L. V. Grigorenko, G. Kaminski, A. G. Knyazev, S. A. Krupko, M. Mentel, E. Yu. Nikolskii, Yu. L. Parfenova, P. Pluchinski, S. A. Rymzhanova, S. I. Sidorchuk, R. S. Slepnev, S. V. Stepantsov, G. M. Ter-Akopian, and R. Wolski
Phys. Rev. C 96, 025807 – Published 28 August 2017

Abstract

Two-proton decay of the Ne17 low-lying states populated in the H1(Ne18,d)Ne17 transfer reaction is studied. The two-proton width Γ2p of the Ne17 first excited 3/2 state at E*=1.288 MeV is of importance for the two-proton radioactivity theory and nuclear-astrophysics applications. A dedicated search for the two-proton emission of this state was performed leading to the new upper limit obtained for the width ratio Γ2p/Γγ<1.6(3)×104. An original, “combined mass” method is suggested and tested as capable of improving the resolution of the experiment, which is a prime significance for the study of nuclear states with extremely small particle-to-gamma width ratios Γpart/Γγ. The condition ΓpartΓγ is quite common for the states of astrophysical interest, which makes the proposed approach promising in this field.

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  • Received 13 June 2017

DOI:https://doi.org/10.1103/PhysRevC.96.025807

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

P. G. Sharov1,2,*, A. S. Fomichev1,3, A. A. Bezbakh1,2, V. Chudoba1,4, I. A. Egorova5,2, M. S. Golovkov1,3, T. A. Golubkova6,2, A. V. Gorshkov1,2, L. V. Grigorenko1,7,8, G. Kaminski1,9, A. G. Knyazev1,2, S. A. Krupko1,2, M. Mentel1,10, E. Yu. Nikolskii7,1, Yu. L. Parfenova1,11, P. Pluchinski1,10, S. A. Rymzhanova1,2, S. I. Sidorchuk1, R. S. Slepnev1, S. V. Stepantsov1, G. M. Ter-Akopian1,3, and R. Wolski1,9

  • 1Flerov Laboratory of Nuclear Reactions, JINR, Dubna, RU-141980, Russia
  • 2SSC RF ITEP of NRC “Kurchatov Institute”, Moscow RU-117218, Russia
  • 3Dubna State University, Dubna RU-141982, Russia
  • 4Institute of Physics, Silesian University in Opava, 74601 Opava, Czech Republic
  • 5Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, RU-141980, Russia
  • 6Advanced Educational and Scientific Center, Moscow State University, Kremenchugskaya 11, 121357 Moscow, Russia
  • 7National Research Center “Kurchatov Institute”, Kurchatov sq. 1, RU-123182 Moscow, Russia
  • 8National Research Nuclear University “MEPhI”, Kashirskoye shosse 31, 115409 Moscow, Russia
  • 9Institute of Nuclear Physics PAN, Radzikowskiego 152, PL-31342 Kraków, Poland
  • 10AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland
  • 11Skobeltsyn Institute of Nuclear Physics, Moscow State University, 119991 Moscow, Russia

  • *Corresponding author: sharovpavel@jinr.ru

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Vol. 96, Iss. 2 — August 2017

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