Physical Review C

Physical Review C

Recent articles in Physical Review C
Erratum: Level structure of ^{103} Ag at high spin [Phys. Rev. C 77, 024305 (2008)] Author(s): S. Ray, N. S. Pattabiraman, Krishichayan, A. Chakraborty, S. Mukhopadhyay, S. S. Ghugre, S. N. Chintalapudi, A. K. Sinha, U. Garg, S. Zhu, B. Kharraja, and D. Almehed [Phys. Rev. C 78, 049901] Published Thu Oct 02, 2008 Isotopic production cross section of fragments in ^{56} Fe+p and ^{136} Xe(^{124} Xe)+Pb reactions over an energy range from 300A to 1500A MeV Author(s): Fu-Hu Liu and Jun-Sheng Li Using a unified description on multiplicity distributions of final-state particles, the spallation residues in ^{56} Fe+p reactions and fragmentation products in ^{136} Xe(^{124} Xe)+Pb reactions at intermediate energy and at the low end of high energies are studied. The isotopic production cross se... [Phys. Rev. C 78, 044602] Published Thu Oct 02, 2008 Fragment emission studies of the ^{16} O+^{12} C reaction Author(s): S. Kundu, A. Dey, K. Banerjee, T. K. Rana, S. Muhkopadhayay, D. Gupta, R. Saha, S. Bhattacharya, and C. Bhattacharya The inclusive energy distributions of the fragments (3⩽Z⩽5) emitted in the reaction ^{16} O+^{12} C have been measured in the angular range 9^{°} to 29^{°} , at the energies 117, 125, 145, and 160 MeV, respectively. The centroids of the fragments energy distributions follow Viola systematics, ... [Phys. Rev. C 78, 044601] Published Wed Oct 01, 2008 Editorial: APS now leaves copyright with authors for derivative works Author(s): Gene D. Sprouse [Phys. Rev. C 78, 040001] Published Wed Oct 01, 2008 Role of the N^{} (1535) in η^{'} production Author(s): Xu Cao and Xi-Guo Lee We study the near-threshold η^{'} production mechanism in nucleon-nucleon and πN collisions under the assumption that subthreshold resonance N^{} (1535) is predominant. In an effective Lagrangian approach that gives a reasonable description to the pN→pNη and π^{-} p→nη reactions, we find t... [Phys. Rev. C 78, 035207] Published Tue Sep 30, 2008 Cross sections for nuclide production in a ^{56} Fe target irradiated by 300, 500, 750, 1000, 1500, and 2600 MeV protons compared with data on a hydrogen target irradiated by 300, 500, 750, 1000, and 1500 MeV/nucleon ^{56} Fe ions Author(s): Yu. E. Titarenko, V. F. Batyaev, A. Yu. Titarenko, M. A. Butko, K. V. Pavlov, S. N. Florya, R. S. Tikhonov, S. G. Mashnik, A. V. Ignatyuk, N. N. Titarenko, W. Gudowski, M. Těšínský, C.-M. L. Persson, H. Ait Abderrahim, H. Kumawat, and H. Duarte This work presents the cross sections for radioactive nuclide production in ^{56} Fe(p,x) reactions determined in six experiments using 300, 500, 750, 1000, 1500, and 2600 MeV protons of the external beam from the ITEP U-10 proton accelerator. In total, 221 independent and cumulative yields of radio... [Phys. Rev. C 78, 034615] Published Tue Sep 30, 2008 Systematic study of the nuclear potential diffuseness through high precision back-angle quasi-elastic scattering Author(s): M. Evers, M. Dasgupta, D. J. Hinde, L. R. Gasques, M. L. Brown, R. Rafiei, and R. G. Thomas High precision measurements for back-angle quasi-elastic scattering of ^{16} O from various target nuclei have been made, and are compared with coupled channels calculations to determine the diffuseness of the real part of the Woods-Saxon nuclear potential. The extracted diffuseness parameters are i... [Phys. Rev. C 78, 034614] Published Tue Sep 30, 2008 Isoscaling and the high-temperature limit Author(s): C. O. Dorso, C. M. Hernández, J. A. López, and J. A. Muñoz This study shows that isoscaling, usually studied in nuclear reactions, is a phenomenon common to all cases of fair sampling. Exact expressions for the yield ratio R_{21} and approximate expressions for the isoscaling parameters α and β are obtained and compared to experimental results. It is conc... [Phys. Rev. C 78, 034613] Published Tue Sep 30, 2008 Single-neutron energies near N=28 and the absence of the N=34 subshell closure in the Ti isotopes Author(s): P. D. Cottle and K. W. Kemper The surprising absence of the N=34 subshell closure in the exotic nucleus ^{56} Ti is highlighted by examining the experimental single neutron energies along the N=28 isotopes, which are extracted from previously existing data on single-neutron transfer reactions on stable isotones and nuclear masse... [Phys. Rev. C 78, 037304] Published Mon Sep 29, 2008 Parton transport and hadronization from the dynamical quasiparticle point of view Author(s): W. Cassing and E. L. Bratkovskaya The hadronization of an expanding partonic fireball is studied within the parton-hadron-string-dynamics (PHSD) approach, which is based on a dynamical quasiparticle model (DQPM) matched to reproduce lattice QCD results in thermodynamic equilibrium. Apart from strong parton interactions, the expansio... [Phys. Rev. C 78, 034919] Published Mon Sep 29, 2008 Energy dependence of Λ and Ξ production in central Pb+Pb collisions at 20A,30A,40A,80A, and 158A GeV measured at the CERN Super Proton Synchrotron Author(s): C. Alt et al. NA49 Collaboration Results on Λ,Λ [over ¯] ,Ξ^{-} , and Ξ [over ¯] ^{+} production in central Pb+Pb reactions at 20A,30A,40A,80A, and 158A GeV are presented. The energy dependence of transverse mass spectra, rapidity spectra, and multiplicities is discussed. Comparisons to string hadronic models (UrQMD and HSD) ... [Phys. Rev. C 78, 034918] Published Mon Sep 29, 2008 Pre-equilibrium dilepton production from an anisotropic quark-gluon plasma Author(s): Mauricio Martinez and Michael Strickland We calculate leading-order dilepton yields from a quark-gluon plasma that has a time-dependent anisotropy in momentum space. Such anisotropies can arise during the earliest stages of quark-gluon plasma evolution due to the rapid longitudinal expansion of the created matter. Two phenomenological mode... [Phys. Rev. C 78, 034917] Published Mon Sep 29, 2008 Thermodynamics for a hadronic gas of fireballs with internal color structures and chiral fields Author(s): Ismail Zakout and Carsten Greiner The thermodynamic partition function for a gas of color-singlet bags consisting of fundamental and adjoint particles in both U(N_{c} ) and SU(N_{c} ) group representations is reviewed in detail. The constituent particle species are assumed to satisfy various thermodynamic statistics. The gas of bags... [Phys. Rev. C 78, 034916] Published Mon Sep 29, 2008 Semiclassical calculations of observable cross sections in breakup reactions Author(s): H. D. Marta, L. F. Canto, and R. Donangelo We develop a semiclassical procedure to calculate breakup reaction products’ angular and energy distributions in the laboratory frame of reference. The effects of the Coulomb and nuclear interaction potentials on the classical trajectories, as well as bound-bound, bound-continuum, and continuum-co... [Phys. Rev. C 78, 034612] Published Mon Sep 29, 2008 Decomposition of the scattering amplitude into shadow and surface components with inclusion of spin-orbit coupling Author(s): Germán Melo, Jorge David, and Albeiro Restrepo We propose a decomposition of the scattering amplitude into shadow and surface components for proton scattering against calcium isotopes as targets at 21 MeV. We account for spin-orbit coupling effects for the optical potential in the nonrelativistic limit. Our calculations show very good agreement ... [Phys. Rev. C 78, 034611] Published Mon Sep 29, 2008 Discrete decay of the yrast superdeformed band in the ^{151} Tb nucleus Author(s): J. Robin et al. The Euroball array has been used to search for linking transitions between the superdeformed (SD) and the normal deformed (ND) wells in ^{151} Tb. Many γ rays in the energy range 2–4 MeV have been observed in coincidence with the yrast SD band. It is proposed that the highest energy transition of... [Phys. Rev. C 78, 034319] Published Mon Sep 29, 2008 Necessary conditions for accurate computations of three-body partial decay widths Author(s): E. Garrido, A. S. Jensen, and D. V. Fedorov The partial width for decay of a resonance into three fragments is largely determined at distances where the energy is smaller than the effective potential producing the corresponding wave function. At short distances the many-body properties are accounted for by preformation or spectroscopic factor... [Phys. Rev. C 78, 034004] Published Mon Sep 29, 2008 Correlated two-proton decay from ^{10} C Author(s): K. Mercurio, R. J. Charity, R. Shane, L. G. Sobotka, J. M. Elson, M. Famiano, A. H. Wuosmaa, A. Banu, C. Fu, L. Trache, R. E. Tribble, and A. M. Mukhamedzhanov The decay of ^{10} C excited states to the 2p+2α exit channel has been studied using inelastic excitation of a secondary ^{10} C beam. The decay sequences leading to the 2p+2α final state are determined for the previously known levels and for a newly found level at E^{} =8.4 MeV. A state at E^{}... [Phys. Rev. C 78, 031602] Published Mon Sep 29, 2008 Selected vector-meson decay distributions in reactions of polarized photons with protons Author(s): A. I. Titov and B. Kämpfer We develop a formalism for studying vector-meson (V) photoproduction at the proton (p) with polarized photons, γ [over →] p→Vp, through an analysis of the decay distribution in the channel V→π^{0} γ. We show that this decay distribution differs noticeably from the distributions of purely ha... [Phys. Rev. C 78, 038201] Published Fri Sep 26, 2008 Shear viscosity and thermal conductivity of nuclear “pasta” Author(s): C. J. Horowitz and D. K. Berry We calculate the shear viscosity η and thermal conductivity κ of a nuclear pasta phase in neutron star crusts. This involves complex nonspherical shapes. We use semiclassical molecular dynamics simulations involving 40, 000 to 100, 000 nucleons. The viscosity η can be simply expressed in term... [Phys. Rev. C 78, 035806] Published Fri Sep 26, 2008 Trojan horse method applied to ^{9} Be(p,α)^{6} Li at astrophysical energies Author(s): Qun-Gang Wen, Cheng-Bo Li, Shu-Hua Zhou, Qiu-Ying Meng, Jing Zhou, Xiao-Mei Li, Shou-Yang Hu, Yuan-Yong Fu, C. Spitaleri, A. Tumino, R. G. Pizzone, and G. G. Rapisarda The low-energy bare-nucleus cross section for ^{9} Be(p,α)^{6} Li has been extracted by means of the Trojan horse method (THM) applied to the ^{2} H(^{9} Be, α,^{6} Li)n reaction at a beam energy of ^{9} Be of 22.35 MeV. For the first time, we assume an intermediate process, ^{9} Be+^{2} H→^{9} ... [Phys. Rev. C 78, 035805] Published Fri Sep 26, 2008 Conformal relativistic viscous hydrodynamics: Applications to RHIC results at sqrt[s_{NN} ] =200 GeV Author(s): Matthew Luzum and Paul Romatschke A new set of equations for relativistic viscous hydrodynamics that captures both weak-coupling and strong-coupling physics to second order in gradients has been developed recently. We apply this framework to bulk physics at the Relativistic Heavy Ion Collider (RHIC), both for standard (Glauber-type)... [Phys. Rev. C 78, 034915] Published Fri Sep 26, 2008 Energy dependence of multiplicity fluctuations in heavy ion collisions at 20A to 158A GeV Author(s): C. Alt et al. Multiplicity fluctuations of positively, negatively, and all charged hadrons in the forward hemisphere were studied in central Pb+Pb collisions at 20A,30A,40A,80A, and 158A GeV. The multiplicity distributions and their scaled variances ω are presented as functions of their dependence on collision e... [Phys. Rev. C 78, 034914] Published Fri Sep 26, 2008 Stress tensor and bulk viscosity in relativistic nuclear collisions Author(s): Rainer J. Fries, Berndt Müller, and Andreas Schäfer We discuss the influence of different initial conditions for the stress tensor and the effect of bulk viscosity on the expansion and cooling of the fireball created in relativistic heavy ion collisions. In particular, we explore the evolution of longitudinal and transverse components of the pressure... [Phys. Rev. C 78, 034913] Published Fri Sep 26, 2008 The (π^{-} ,K^{+} ) reaction on ^{28} Si and the Σ-nucleus potential Author(s): Janusz Dąbrowski and Jacek Rożynek We calculate in the impulse approximation the kaon spectrum from the (π^{-} ,K^{+} ) reaction on ^{28} Si. The strength V_{Σ} of the real part of the single particle potential of the Σ hyperons produced in the reaction is obtained from the Nijmegen model F of the baryon-baryon interaction, and th... [Phys. Rev. C 78, 037601] Published Thu Sep 25, 2008 Corrections to correlators in p [over ¯] _{t} fluctuation measurements Author(s): Peter Filip Correction terms generated in the correlator analysis due to multiplicity-dependent observable mean are investigated. A procedure for the subtraction of correction terms from the correlators evaluated at fixed observed multiplicity is described. Benefits from the measurement of higher-order correlat... [Phys. Rev. C 78, 034912] Published Thu Sep 25, 2008 Relativistic nuclear energy density functionals: Adjusting parameters to binding energies Author(s): T. Nikšić, D. Vretenar, and P. Ring We study a particular class of relativistic nuclear energy density functionals in which only nucleon degrees of freedom are explicitly used in the construction of effective interaction terms. Short-distance (high-momentum) correlations, as well as intermediate- and long-range dynamics, are encoded i... [Phys. Rev. C 78, 034318] Published Thu Sep 25, 2008 Coulomb dissociation of ^{9} Li and the rate of the ^{8} Li(n,γ)^{9} Li reaction Author(s): P. Banerjee, R. Chatterjee, and R. Shyam We calculate the Coulomb dissociation of ^{9} Li on Pb and U targets at 28.5 MeV/A beam energy within a finite range distorted wave Born approximation formalism of the breakup reactions. Invoking the principle of detailed balance, these cross sections are used to determine the excitation function an... [Phys. Rev. C 78, 035804] Published Wed Sep 24, 2008 Synthesis of superheavy nuclei: A search for new production reactions Author(s): Valery Zagrebaev and Walter Greiner Nuclear reactions leading to the formation of new superheavy (SH) elements and isotopes are discussed in the paper. “Cold” and “hot” synthesis, fusion of fission fragments, transfer reactions, and reactions with radioactive ion beams are analyzed along with their abilities and limitations. I... [Phys. Rev. C 78, 034610] Published Wed Sep 24, 2008 Neutron capture cross section of ^{241} Am Author(s): M. Jandel, T. A. Bredeweg, E. M. Bond, M. B. Chadwick, R. R. Clement, A. Couture, J. M. O'Donnell, R. C. Haight, T. Kawano, R. Reifarth, R. S. Rundberg, J. L. Ullmann, D. J. Vieira, J. B. Wilhelmy, J. M. Wouters, U. Agvaanluvsan, W. E. Parker, C. Y. Wu, and J. A. Becker The neutron capture cross section of ^{241} Am for incident neutrons from 0.02 eV to 320 keV has been measured with the detector for advanced neutron capture experiments (DANCE) at the Los Alamos Neutron Science Center. The thermal neutron capture cross section was determined to be 665±33 b. Our re... [Phys. Rev. C 78, 034609] Published Wed Sep 24, 2008

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