title: Structure of 10He low-lying states uncovered by correlations.
abstract: The 0+ ground state of the 10He nucleus produced in the 3H(8He,p)10He reaction was found at about 2.1±0.2  MeV (Γ∼2  MeV) above the three-body ^{8}He+n+n breakup threshold. Angular correlations observed for ^{10}He decay products show prominent interference patterns allowing us to draw conclusions about the structure of low-energy excited states. We interpret the observed correlations as a coherent superposition of a broad 1- state having a maximum at energy 4-6 MeV and a 2+ state above 6 MeV, setting both on top of the 0+ state "tail." This anomalous level ordering indicates that the breakdown of the N=8 shell known in 12Be thus extends also to the ^{10}He system.
authors.affiliation: Flerov Laboratory of Nuclear Reactions, JINR, Dubna, RU-141980, Russia.
authors.forename: S I
authors.initials: SI
authors.lastname: Sidorchuk
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authors.lastname: Bezbakh
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authors.initials: V
authors.lastname: Chudoba
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authors.initials: IA
authors.lastname: Egorova
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authors.initials: AS
authors.lastname: Fomichev
authors.forename: M S
authors.initials: MS
authors.lastname: Golovkov
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authors.lastname: Gorshkov
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authors.initials: VA
authors.lastname: Gorshkov
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authors.initials: LV
authors.lastname: Grigorenko
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authors.lastname: Jalůvková
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authors.lastname: Kaminski
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authors.initials: SA
authors.lastname: Krupko
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authors.lastname: Kuzmin
authors.forename: E Yu
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authors.lastname: Nikolskii
authors.forename: Yu Ts
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authors.lastname: Oganessian
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authors.initials: YL
authors.lastname: Parfenova
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authors.initials: PG
authors.lastname: Sharov
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authors.initials: RS
authors.lastname: Slepnev
authors.forename: S V
authors.initials: SV
authors.lastname: Stepantsov
authors.forename: G M
authors.initials: GM
authors.lastname: Ter-Akopian
authors.forename: R
authors.initials: R
authors.lastname: Wolski
authors.forename: A A
authors.initials: AA
authors.lastname: Yukhimchuk
authors.forename: S V
authors.initials: SV
authors.lastname: Filchagin
authors.forename: A A
authors.initials: AA
authors.lastname: Kirdyashkin
authors.forename: I P
authors.initials: IP
authors.lastname: Maksimkin
authors.forename: O P
authors.initials: OP
authors.lastname: Vikhlyantsev