JETP Letters

, Volume 101, Issue 2, pp 69–73 | Cite as

Observation of new states of the 7He isotope

  • Yu. B. Gurov
  • L. Yu. Korotkova
  • S. V. Lapushkin
  • R. V. Pritula
  • V. G. Sandukovsky
  • M. V. Tel’kushev
  • B. A. Chernyshev
Article

Abstract

The formation of the 7He heavy isotope has been studied in the 11B(π, pt)7He, 11B(π, dd)7He, and 10B(π, pd)7He reactions of absorption of stopped π mesons. No indications of the existence of a low-lying level with E x ∼ 1 MeV have been obtained in any of the three reactions. The existence of three narrow states with excitation energies E x = 3.1(1), 4.90(15), and 6.65(15) MeV has been proven. Highly excited states with E x = 16.9(5) MeV, Γ = 1.0(3) MeV, E x = 19.8(3) MeV, Γ = 1.5(3) MeV, and E x = 24.8(4) MeV, Γ = 4.6(7) MeV have been identified.

Keywords

Excitation Energy JETP Letter Dalitz Plot High Excitation Energy Boron Isotope 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Inc. 2015

Authors and Affiliations

  • Yu. B. Gurov
    • 1
  • L. Yu. Korotkova
    • 1
  • S. V. Lapushkin
    • 1
  • R. V. Pritula
    • 1
  • V. G. Sandukovsky
    • 1
  • M. V. Tel’kushev
    • 1
  • B. A. Chernyshev
    • 1
  1. 1.National Research Nuclear University MEPhIMoscowRussia

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