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Formation of 8He in the 9Be(π–, p)X and 10B(π–, pp)X Stopped Pion Absorption Reactions

  • FIELDS, PARTICLES, AND NUCLEI
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The structure of levels of the 8He heavy helium isotope has been studied in the 9Be\(({{\pi }^{ - }},p)X\) and 10B\(({{\pi }^{ - }},pp)X\) stopped pion absorption reactions. Measurements have been performed with a two-arm multilayer semiconductor spectrometer at the LANL. Indications to the existence of a soft dipole mode at the excitation energy \({{E}_{x}} \approx 3\) MeV have been obtained. A state with a high excitation energy of 12.2(5) MeV has been observed for the first time.

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Funding

This work was supported by the Ministry of Science and Higher Education of the Russian Federation (project no. 0723-2020-0041) and by the Russian Science Foundation (project no. 18-12-00312).

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Authors and Affiliations

  1. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Moscow, Russia

    Yu. B. Gurov, S. V. Lapushkin, T. I. Leonova, M. V. Tel’kushev & B. A. Chernyshev

  2. Joint Institute for Nuclear Research, 141980, Dubna, Moscow region, Russia

    Yu. B. Gurov & V. G. Sandukovsky

Authors
  1. Yu. B. Gurov
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  2. S. V. Lapushkin
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  3. T. I. Leonova
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  4. V. G. Sandukovsky
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  5. M. V. Tel’kushev
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  6. B. A. Chernyshev
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Correspondence to B. A. Chernyshev.

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Translated by R. Tyapaev

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Gurov, Y.B., Lapushkin, S.V., Leonova, T.I. et al. Formation of 8He in the 9Be(π–, p)X and 10B(π–, pp)X Stopped Pion Absorption Reactions. Jetp Lett. 113, 135–139 (2021). https://doi.org/10.1134/S0021364021030061

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  • DOI: https://doi.org/10.1134/S0021364021030061

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