168 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 1/2−1/2^-. The observed angular correlation pattern is uniquely explained by the interference of the 1/2−1/2^- 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

    New broad 8Be nuclear resonances

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    Energies, total and partial widths, and reduced width amplitudes of 8Be resonances up to an excitation energy of 26 MeV are extracted from a coupled channel analysis of experimental data. The presence of an extremely broad J^pi = 2^+ ``intruder'' resonance is confirmed, while a new 1^+ and very broad 4^+ resonance are discovered. A previously known 22 MeV 2^+ resonance is likely resolved into two resonances. The experimental J^pi T = 3^(+)? resonance at 22 MeV is determined to be 3^-0, and the experimental 1^-? (at 19 MeV) and 4^-? resonances to be isospin 0.Comment: 16 pages, LaTe

    Spectroscopy of 9C via resonance scattering of protons on 8B

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    The structure of the neutron-deficient 9C isotope was studied via elastic scattering of radioactive 8B on protons. An excitation function for resonance elastic scattering was measured in the energy range from 0.5 to 3.2 MeV in the center-of-momentum system. A new excited state in 9C was observed at an excitation energy of 3.6 MeV. An R-matrix analysis indicates spin-parity 5/2- for the new state. The results of this experiment are compared with Continuum Shell Model calculations.Comment: 9 pages, 8 figures, 3 table

    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
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