Bulletin of the American Physical Society
2012 Fall Meeting of the APS Division of Nuclear Physics
Volume 57, Number 9
Wednesday–Saturday, October 24–27, 2012; Newport Beach, California
Session CA: Nuclear Physics at California Institutions: From Large to the Very Small |
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Chair: Calvin Johnson, San Diego State University Room: Plaza I |
Thursday, October 25, 2012 8:30AM - 9:06AM |
CA.00001: Exploring the Limits of Nuclear Stability: Production of the Heaviest Elements Invited Speaker: Joseph H. Hamilton The Dubna/LLNL collaboration has been investigating the nuclear and chemical properties of the heaviest elements since 1989. Elements 113 -- 118 have been synthesized and characterized [see J. Phys. G: Nucl. Part. Phys. {\bf 34} (2007) R165 and PRL {\bf 104} (2010) 142502] using fusion-evaporation nuclear reactions of $^{48}$Ca beams on actinide targets ($^{237}$Np, $^{242,244}$Pu, $^{243}$Am, $^{245,248}$Cm, $^{249}$Bk, and $^{249}$Cf, respectively) at the U400 cyclotron located at the Flerov Laboratory of Nuclear Reactions in Dubna, Russia. This talk will discuss the ramifications of the experimental work during the last 10-15 years on the synthesis of elements 113 -- 118, including the recent IUPAC acceptance of element names for 114 (flerovium) and 116 (livermorium) and a discussion of the prospects for expanding the periodic table even further beyond element 118. Prediction of the heaviest element possible is highly uncertain because of the complex interplay of strong nuclear forces, Coulomb forces, surface/volume effects and shell corrections. For some combination of protons ($Z > 118$) and neutrons, the strong nuclear force which binds nucleons together will not be able to counter the Coulomb repulsion of the protons in a nucleus, and thus nuclei will cease to exist. Experimental and theoretical efforts to locate and access the next region of doubly-magic spherically-shaped nuclei, the Island of Stability, will be presented. [Preview Abstract] |
Thursday, October 25, 2012 9:06AM - 9:42AM |
CA.00002: The Quark Gluon Plasma at LHC and RHIC: Does the energy scale make a difference? Invited Speaker: Miklos Gyulassy Recent data from RHIC and LHC on nuclear collisions have enlarged significantly the beam energy range $\sqrt{s} = 8 - 2760$ AGeV used to produce and diagnose the Quark Gluon Plasma phase of nuclear matter. The data reveal surprising similarities and differences between classes of observables probing a much wide range of energy and baryon densities than before. In this talk, I survey highlights of the latest data and contrast interpretations in terms dynamical models based on perturbative QCD and higher dimensional gravity dual AdS/CFT paradigms. [Preview Abstract] |
Thursday, October 25, 2012 9:42AM - 10:18AM |
CA.00003: Precision Results on $\theta_{13}$: Measurements and Implications Invited Speaker: Jim Napolitano Over the past decade, terrestrial experiments have proven that neutrino oscillations explain the solar neutrino problem and the atmospheric neutrino anomaly. These phenomena rely on neutrino mixing between the first and second, and second and third, neutrino generations, respectively. However, other experiments put limits on mixing between the first and third generations, and suggested a rather small mixing angle $\theta_{13}$. In March 2012 the Daya Bay Reactor Neutrino Experiment reported a conclusive measurement of $\theta_{13}$, with a larger value than generally expected. This result was consistent with some earlier indications of a nonzero $\theta_{13}$ from T2K, MINOS, KamLAND, and Double Chooz, and was soon confirmed by RENO. This talk will present updated results from Daya Bay and other experiments, and discuss consequences for the next generation of neutrino experiments, in the US and abroad. [Preview Abstract] |
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