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  1. Article ; Online: Recent results related to excited states of 6Be and 10He

    Wolski R. / Zhukov M. V. / Ter-Akopian G. M. / Stepantsov S. V. / Slepnev R. S. / Sidorchuk S. I. / Sharov P. G. / Parfenova Yu. L. / Mukha I. G. / Nikolskii E. Yu. / Kuzmin E. A. / Krupko S. A. / Kaminski G. / Jaluvkova P. / Grigorenko L. V. / Gorshkov A. V. / Golovkov M. S. / Ershov S. N. / Chudoba V. /
    Egorova I. A. / Bezbakh A. A. / Fomichev A. S. / Yukhimchuk A. A. / Filchagin S. V. / Kirdyashkin A. A. / Maksimkin I. P. / Vikhlyantsev O. P.

    EPJ Web of Conferences, Vol 38, p

    2012  Volume 15002

    Abstract: The 1H(6Li, 6Be)n charge-exchange reaction and the 3H(8He,p)10He two-neutron transfer reaction were recently carried out at the ACCULINNA fragment separator (FLNR, Dubna) to populate the ground and excited states of 6Be and 10He nuclei, respectively. The ...

    Abstract The 1H(6Li, 6Be)n charge-exchange reaction and the 3H(8He,p)10He two-neutron transfer reaction were recently carried out at the ACCULINNA fragment separator (FLNR, Dubna) to populate the ground and excited states of 6Be and 10He nuclei, respectively. The 6Be ET spectrum (ET is the 6Be energy above its 4He+p+p decay threshold) was obtained with high statistics and described by the well-known 0+ ground state of 6Be at ET = 1.37 MeV, the 2+ state at ET = 3.05 MeV and a broad structure extending from 4 to 16 MeV which could be interpreted as the isovector soft dipole mode associated with the 6Li ground state. In the 10He case the 0+ ground state was found at about 2.1(2) MeV (Γ ~ 2 MeV) above the 8He+n+n breakup threshold. Angular correlations observed for 10He decay products show prominent interference patterns allowing to draw conclusions about the structure of low-energy excited states: 1-(ET ~ 5 MeV) and 2+ (ET ~ 6 MeV).
    Keywords Physics ; QC1-999 ; Science ; Q ; DOAJ:Physics (General) ; DOAJ:Physics and Astronomy
    Subject code 541
    Language English
    Publishing date 2012-12-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Structure of 10He low-lying states uncovered by correlations.

    Sidorchuk, S I / Bezbakh, A A / Chudoba, V / Egorova, I A / Fomichev, A S / Golovkov, M S / Gorshkov, A V / Gorshkov, V A / Grigorenko, L V / Jalůvková, P / Kaminski, G / Krupko, S A / Kuzmin, E A / Nikolskii, E Yu / Oganessian, Yu Ts / Parfenova, Yu L / Sharov, P G / Slepnev, R S / Stepantsov, S V /
    Ter-Akopian, G M / Wolski, R / Yukhimchuk, A A / Filchagin, S V / Kirdyashkin, A A / Maksimkin, I P / Vikhlyantsev, O P

    Physical review letters

    2012  Volume 108, Issue 20, Page(s) 202502

    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 ... ...

    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.
    Language English
    Publishing date 2012-05-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.108.202502
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