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Sökning: L773:0375 9474

  • Resultat 1-10 av 275
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  • Rudolph, D, et al. (författare)
  • Multiparticle-hole states of high spin in N < 50, A ≈ 90 nuclei : 1. The transitional nucleus 4389Tc46
  • 1995
  • Ingår i: Nuclear Physics A. - 0375-9474 .- 1873-1554. ; 587:1, s. 181-201
  • Tidskriftsartikel (refereegranskat)abstract
    • High spin states in the nucleus 89Tc have been studied via the fusion evaporation reaction 58Ni(40Ca,2αp)89Tc at 180 MeV beam energy. The NORDBALL γ-ray spectrometer equipped with auxiliary detectors for light particle selection was used to measure γγ- and particle-γγ coin-cidences. Some 60 transitions were placed into a level scheme comprising 38 levels reaching up to 9.2 MeV excitation energy and a possible spin of <img src="http://ars.els-cdn.com/content/image/1-s2.0-0375947494008258-si1.gif" data-loaded="true" data-inlimgeid="1-s2.0-0375947494008258-si1.gif" />. The level scheme is compared to those of neighbouring nuclei and interpreted in terms of the spherical shell model. The calculations were performed with different sets of parameters within a restricted <img src="http://ars.els-cdn.com/content/image/1-s2.0-0375947494008258-si2.gif" data-loaded="true" data-inlimgeid="1-s2.0-0375947494008258-si2.gif" />, <img src="http://ars.els-cdn.com/content/image/1-s2.0-0375947494008258-si3.gif" data-loaded="true" data-inlimgeid="1-s2.0-0375947494008258-si3.gif" />, <img src="http://ars.els-cdn.com/content/image/1-s2.0-0375947494008258-si4.gif" data-loaded="true" data-inlimgeid="1-s2.0-0375947494008258-si4.gif" /> and <img src="http://ars.els-cdn.com/content/image/1-s2.0-0375947494008258-si5.gif" data-loaded="true" data-inlimgeid="1-s2.0-0375947494008258-si5.gif" /> configuration space. States above 2.3 MeV excitation energy are well reproduced by shell model calculations based on an empirical residual interaction, whereas collective excitations are suggested to contribute to the wave functions of lower lying states.
  • Aad, G, et al. (författare)
  • ATLAS Collaboration
  • 2016
  • Ingår i: Nuclear Physics A. - Elsevier. - 0375-9474. ; 956, s. 922-944
  • Tidskriftsartikel (refereegranskat)
  • Avdeichikov, V, et al. (författare)
  • CHICSi - a 3pi Multi-detector System for Studying Heavy Ion Interactions Inside a Storage Ring
  • 1999
  • Ingår i: Nuclear physics A. - 0375-9474. ; 626:1-2, s. 439-446
  • Tidskriftsartikel (refereegranskat)abstract
    • CHICSi - a 3 multi-detector system is presented. The setup consists of 576 ultra high vacuum compatible telescopes to study intermediate energy heavy ion as well as proton induced collisions at storage rings operating in slow ramping mode. Primary it will be installed at the gas-jet target station of the CELSIUS facility at The Svedberg Laboratory in Uppsala.
  • Ghetti, R, et al. (författare)
  • Particle emission time sequence in intermediate energy heavy ion reactions
  • 2003
  • Ingår i: Nuclear Physics A. - 0375-9474. ; 721, s. 313c-316c
  • Tidskriftsartikel (refereegranskat)abstract
    • The CHIC Collaboration has performed a series of simultaneous pp, np and nn fermion interferometry experiments in order to study the space-time evolution of the emission sources in intermediate energy heavy ion reactions. Furthermore, when correlations of non-identical particles are available, additional model independent information on the emission chronology of the particles is obtained. In this contribution, after reviewing the method to determine the order of emission of non-identical particles, we discuss the emission chronology of neutrons and protons from the E/A = 45 MeV 58Ni + 27Al reaction and from the E/A = 60 MeV 36Ar + 27Al reaction, shown here for the first time.
  • Adam, J., et al. (författare)
  • ALICE Collaboration
  • 2016
  • Ingår i: Nuclear Physics A. - Elsevier. - 0375-9474. ; 956, s. 913-921
  • Tidskriftsartikel (refereegranskat)
  • Adamovich, M.I., et al. (författare)
  • Charged particle multiplicity and pseudorapidity density distributions in 16O-, 28Si- and 197Au-induced nuclear interactions at 14.6 and 11.6A GeV/c
  • 1995
  • Ingår i: Nuclear Physics, Section A. - Elsevier. - 0375-9474. ; 593:4, s. 535-549
  • Tidskriftsartikel (refereegranskat)abstract
    • Pseudorapidity density and multiplicity distributions of charged particles produced in heavy-ion collisions at the BNL AGS have been studied. The multiplicity distributions and pseudorapidity distributions of shower particles in Au-induced interactions are presented and compared with model predictions from RQMD, FRITIOF and VENUS. It is shown that the widths of the pseudorapidity distributions of produced particles in central collisions are independent of the interacting system. The results from EMU01 have been compared, and found to agree, with the results from two other heavy-ion experiments, E802 and E814.
  • Adare, A, et al. (författare)
  • PHENIX Collaboration
  • 2017
  • Ingår i: Nuclear Physics A. - Elsevier. - 0375-9474. ; 967, s. 996-1003
  • Tidskriftsartikel (refereegranskat)
  • Ahrens, J., et al. (författare)
  • Results from the AMANDA telescope
  • 2003
  • Ingår i: Nuclear Physics A. - Elsevier. - 0375-9474. ; 721, s. C545-C548
  • Tidskriftsartikel (refereegranskat)abstract
    • We present results from the AMANDA high energy neutrino telescope located at the South Pole. They include measurements of the atmospheric neutrino flux, search for UHE point sources, and diffuse sources producing electromagnetic/hadronic showers at the detector or close to it.
  • Aleksandrov, D., et al. (författare)
  • Halo excitations in fragmentation of He-6 at 240 MeV/u on carbon and lead targets
  • 2000
  • Ingår i: Nuclear Physics A. - 0375-9474. ; 669:1-2, s. 51-64
  • Tidskriftsartikel (refereegranskat)abstract
    • Dissociation of a 240 MeV/u beam of He-6, incident on carbon and lead targets, has been studied in kinematically complete experiments to investigate low-lying excitation modes in the halo nucleus He-6. It is shown that alignment effects characterize the inelastic scattering and allow an unambiguous assignment of the spin of a narrow resonance observed in the excitation energy spectrum. The differential cross sections for the He-6 inelastic scattering on carbon and lead targets were deduced from the measured moments of the two neutrons and the a-particle. An analysis of these distributions shows that quadrupole and, possibly, monopole excitations characterize the hadronic interaction, while the dipole mode is dominating in Coulomb dissociation. Neither theoretically predicted new resonance states in He-6 nor nuclear excitation of a dipole mode were found. Direct evidence has been obtained for strong suppression of Coulornb post-acceleration in direct Coulomb breakup in a lead target.
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