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Soft dipole mode in 8He
Authors
V. Chudoba
Andrey Fomichev
+27 more
M.S. Golovkov
V.A. Gorshkov
Leonid Grigorenko
S.K. Grishechkin
Francis Hanappe
A.A. Korsheninnikov
S.A. Krupko
E.A. Kuzmin
Wolfgang Mittig
Yu Nikolskii
A. Ninane
B.G. Novatskii
Yu.Ts. Oganessian
Danyang Pang
V.V. Perevozchikov
AM Rodin
Patricia Roussel-Chomaz
S.I. Sidorchuk
R.S. Slepnev
D.N. Stepanov
S.V. Stepantsov
Louise Stuttge
Gurgen Ter-Akopian
Yu Vinogradov
Roman Wolski
Arkadiy Yukhimchuk
S.V. Zlatoustovskiy
Publication date
1 January 2009
Publisher
'Pleiades Publishing Ltd'
Doi
Cite
Abstract
The low-lying spectrum of 8He was studied in the 3H(6He, p)8He transfer reaction for small center of mass angles. The 0+ ground state (g.s.) of 8He and excited states, 2+ at 3.6-3.9 MeV and (1+) at 5.3-5.5 MeV, were populated with cross sections of 200, 100-250, and 90-125 μb/sr. Some evidence for the excited state at about 7.5 MeV can be found in the data. The possible nature of the near-threshold anomaly above 2.14 MeV in 8He is related to the population of a 1- continuum (soft dipole excitation) with a peak energy value at about 3 MeV. This assumption can probably resolve the problem of a large uncertainty existing in the experimental data on the 8He 2+ state energy. © Pleiades Publishing, Ltd. 2009.SCOPUS: ar.jinfo:eu-repo/semantics/publishe
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Last time updated on 23/02/2017