217 research outputs found

    New insight into the low-energy 9^9He spectrum

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    The spectrum of 9^9He was studied by means of the 8^8He(dd,pp)9^9He reaction at a lab energy of 25 MeV/n and small center of mass (c.m.) angles. Energy and angular correlations were obtained for the 9^9He decay products by complete kinematical reconstruction. The data do not show narrow states at \sim 1.3 and \sim 2.4 MeV reported before for 9^9He. The lowest resonant state of 9^9He is found at about 2 MeV with a width of \sim 2 MeV and is identified as 1/21/2^-. The observed angular correlation pattern is uniquely explained by the interference of the 1/21/2^- resonance with a virtual state 1/2+1/2^+ (limit on the scattering length is obtained as a>20a > -20 fm), and with the 5/2+5/2^+ resonance at energy 4.2\geq 4.2 MeV.Comment: 5 pages, 4 figures, 2 table

    Three-body correlations in direct reactions: Example of 6^{6}Be populated in (p,n)(p,n) reaction

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    The 6^{6}Be continuum states were populated in the charge-exchange reaction 1^1H(6^{6}Li,6^{6}Be)nn collecting very high statistics data (5×106\sim 5 \times 10^6 events) on the three-body α\alpha+pp+pp correlations. The 6^{6}Be excitation energy region below 3\sim 3 MeV is considered, where the data are dominated by contributions from the 0+0^+ and 2+2^+ states. It is demonstrated how the high-statistics few-body correlation data can be used to extract detailed information on the reaction mechanism. Such a derivation is based on the fact that highly spin-aligned states are typically populated in the direct reactions.Comment: submitted to Physical Review

    10He low-lying states structure uncovered by correlations

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    The 0+ ground state of the 10He nucleus produced in the 3H(8He,p)10He reaction was found at about 2.1±0.22.1\pm0.2 MeV (\Gamma ~ 2 MeV) above the three-body 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. We interpret the observed correlations as a coherent superposition of the broad 1- state having a maximum at energy 4-6 MeV and the 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 10He system.Comment: 5 pages, 5 figure

    Structure of unbound neutron-rich 9^{9}He studied using single-neutron transfer

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    The 8He(d,p) reaction was studied in inverse kinematics at 15.4A MeV using the MUST2 Si-CsI array in order to shed light on the level structure of 9He. The well known 16O(d,p)17O reaction, performed here in reverse kinematics, was used as a test to validate the experimental methods. The 9He missing mass spectrum was deduced from the kinetic energies and emission angles of the recoiling protons. Several structures were observed above the neutron-emission threshold and the angular distributions were used to deduce the multipolarity of the transitions. This work confirms that the ground state of 9He is located very close to the neutron threshold of 8He and supports the occurrence of parity inversion in 9He.Comment: Exp\'erience GANIL/SPIRAL1/MUST

    Das Beinenhaus Marsch, Op. 124

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    For voice and piano. Cover illustrated in color and signed by Birgit Krohn in the upper right hand corner. Plate number 796.https://scholarexchange.furman.edu/krohn-album3/1032/thumbnail.jp

    Therapy chronic trichomoniasis at patients with associated urogenital chlamydial infection

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    Present material of problem question therapy chronic trichomoniasis. Study clinical and bacteriological effectiveness basic etiotropic preparation and their combination, used in treatment patients trichomoniasis. Found that the combined application antiprotozoal drugs have a more pronounced effect on kills T. vaginalis and shortens the rehabilitation of the patient

    Digital receivers for low-frequency radio telescopes UTR-2, URAN, GURT

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    This paper describes digital radio astronomical receivers used for decameter and meter wavelength observations. This paper describes digital radio astronomical receivers used for decameter and meter wavelength observations. Since 1998, digital receivers performing on-the-fly dynamic spectrum calculations or waveform data recording without data loss have been used at the UTR-2 radio telescope, the URAN VLBI system, and the GURT new generation radio telescope. Here we detail these receivers developed for operation in the strong interference environment that prevails in the decameter wavelength range. Data collected with these receivers allowed us to discover numerous radio astronomical objects and phenomena at low frequencies, a summary of which is also presented.Comment: 24 pages, 15 figure

    CHLAMYDOPHILA PNEUMONIAE-ИНФЕКЦИЯ КАК ФАКТОР РИСКА РАЗВИТИЯ АТЕРОСКЛЕРОЗА (ОБЗОР ЛИТЕРАТУРЫ)

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    The prevalence of atherosclerosis and associated diseases and complications creates preconditions to study them in the framework of the common pathological process. This review presents the modern data on the role of Chlamydophila pneumoniae infections, as well as data about the influence of the factors of systemic and local inflammationat the infection to the development of atherosclerosis.Распространенность атеросклероза и ассоциированных с ним заболеваний и осложнений создает предпосылки к изучению их в рамках единого патологического процесса. В обзоре представлены современные сведения о роли Chlamydophila pneumoniae-инфекции, а также данные о влиянии факторов системного и локального воспаления при указанной инфекции на развитие атеросклероза

    Search for 2p Decay of the First Excited State of 17 Ne

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    Structure of nuclei located near and beyond the drip-lines plays important role in the explosive astrophysical processes. The problem of two-proton decay of the 17Ne first excited state is a good example of such situation. The two-proton radiative capture is a possible bypass of the 15O waiting point in the rp-process. The rate of this process drastically depends on the value of the weak
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