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Электронный каталог: Khirk, M. S. - Correlation Studies for the *7He Excited States
Khirk, M. S. - Correlation Studies for the *7He Excited States
Статья
Автор: Khirk, M. S.
Physical Review C: Correlation Studies for the *7He Excited States
б.г.
ISBN отсутствует
Автор: Khirk, M. S.
Physical Review C: Correlation Studies for the *7He Excited States
б.г.
ISBN отсутствует
На полку
Статья
Khirk, M.S.
Correlation Studies for the *7He Excited States / M.S.Khirk, L.V.Grigorenko, E.Yu.Nikolskii, P.G.Sharov. – Text : electronic // Physical Review C. – 2025. – Vol. 112, No. 4. – P. 044605. – URL: https://doi.org/10.1103/z2k7-tqwz.
The unbound nucleus *7He was recently studied in the *2H(*6He,*1H)*7He reaction at 29 𝐴MeV beam energy by Golovkov et al. [Phys. Rev. C 109, L061602 (2024)]. The excitation spectrum of *7He was measured up to 𝐸&sub(𝑇)=8 MeV (𝐸&sub(𝑇) is energy above the *6He−𝑛 threshold). Angular distribution for the *6He−𝑛 decay of the *7He 3/2*− ground state can be explained by a strong spin alignment induced by a reaction mechanism. The correlation information for the higher-lying *7He excitations is available as backward-forward asymmetry for the *6He−𝑛 decay in the *7He frame. The asymmetry function has an expressed energy profile, which may be explained by using quite restrictive assumptions about structure of *7He excitations or/and peculiarities of the reaction mechanism. In the analysis of Golovkov et al. the observation the 𝑠&sub(1/2) state in *7He is declared with 𝐸&sub(𝑟)≈2.0 MeV. Our work is based on the same *7He data. However, the data analysis was improved and also the data interpretation is substantiated with the detailed PWBA reaction studies and coupled-channel calculations of the *7He continuous spectrum. The idea of the 𝑠&sub(1/2) resonant state with 𝐸&sub(𝑟)≈2.0 is rejected. In addition, the position of the 1/2− state in *7He is confined to the interval 𝐸&sub(𝑟)=2.2–3.0 MeV, with preferred value 2.6 MeV. There is indication on the second 3/2*− state in the data with 𝐸&sub(𝑟)≈4.5 MeV and with the lower resonance energy limit 𝐸&sub(𝑟)≳3.5 MeV. Importance and prospects of more detailed correlation studies of *7He continuum are discussed.
ОИЯИ = ОИЯИ (JINR)2025
Khirk, M.S.
Correlation Studies for the *7He Excited States / M.S.Khirk, L.V.Grigorenko, E.Yu.Nikolskii, P.G.Sharov. – Text : electronic // Physical Review C. – 2025. – Vol. 112, No. 4. – P. 044605. – URL: https://doi.org/10.1103/z2k7-tqwz.
The unbound nucleus *7He was recently studied in the *2H(*6He,*1H)*7He reaction at 29 𝐴MeV beam energy by Golovkov et al. [Phys. Rev. C 109, L061602 (2024)]. The excitation spectrum of *7He was measured up to 𝐸&sub(𝑇)=8 MeV (𝐸&sub(𝑇) is energy above the *6He−𝑛 threshold). Angular distribution for the *6He−𝑛 decay of the *7He 3/2*− ground state can be explained by a strong spin alignment induced by a reaction mechanism. The correlation information for the higher-lying *7He excitations is available as backward-forward asymmetry for the *6He−𝑛 decay in the *7He frame. The asymmetry function has an expressed energy profile, which may be explained by using quite restrictive assumptions about structure of *7He excitations or/and peculiarities of the reaction mechanism. In the analysis of Golovkov et al. the observation the 𝑠&sub(1/2) state in *7He is declared with 𝐸&sub(𝑟)≈2.0 MeV. Our work is based on the same *7He data. However, the data analysis was improved and also the data interpretation is substantiated with the detailed PWBA reaction studies and coupled-channel calculations of the *7He continuous spectrum. The idea of the 𝑠&sub(1/2) resonant state with 𝐸&sub(𝑟)≈2.0 is rejected. In addition, the position of the 1/2− state in *7He is confined to the interval 𝐸&sub(𝑟)=2.2–3.0 MeV, with preferred value 2.6 MeV. There is indication on the second 3/2*− state in the data with 𝐸&sub(𝑟)≈4.5 MeV and with the lower resonance energy limit 𝐸&sub(𝑟)≳3.5 MeV. Importance and prospects of more detailed correlation studies of *7He continuum are discussed.
ОИЯИ = ОИЯИ (JINR)2025
