Evidence for the First Excited State of H 7
- Bezbakh, A.A.
- Chudoba, V.
- Krupko, S. A.
- Belogurov, S. G.
- Biare, D.
- Fomichev, A. S.
- Gazeeva, E. M.
- Gorshkov, A. V.
- Grigorenko, L
- Kaminski, G.
- Kiselev, O. A.
- Kostyleva, D.
- Kozlov, M. Yu
- Mauyey, B.
- Mukha, I. G.
- Muzalevskii, I. A.
- Nikolskii, E.Y.
- Parfenova, Y. L.
- Piatek, W.
- Quynh, A. M.
- Schetinin, V. N.
- Serikov, A.
- Sidorchuk, S. I.
- Sharov, P.G.
- Slepnev, R. S.
- Stepantsov, S. V.
- Swiercz, A.
- Szymkiewicz, P.
- Ter-Akopian, G. M.
- Wolski, R.
- Zalewski, B.
- Zhukov, Mikhail
Publication date
January 2020
DOI Publisher
American Physical Society (APS)Abstract
The H7 system was populated in the H2(He8,He3)H7 reaction with a 26 AMeV He8 beam. The H7 missing mass energy spectrum, the H3 energy and angular distributions in the H7 decay frame were reconstructed. The H7 missing mass spectrum shows a peak, which can be interpreted either as unresolved 5/2+ and 3/2+ doublet or one of these states at 6.5(5) MeV. The data also provide indications of the 1/2+ ground state of H7 located at 1.8(5) MeV with quite a low population cross section of ∼25 μb/sr within angular range θc.m.≃(17\ub0-27\ub0)
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