https://ir.lib.ncu.edu.tw/handle/987654321/25094 本系成立於 1968 年，初期分為物理組與地球物理組，其中地球物理組於 1976 年獨立為地球物理系。 Search the Channel s https://ir.lib.ncu.edu.tw/simple-search https://ir.lib.ncu.edu.tw/handle/987654321/108475 title: ϒ(nS) polarizations versus particle multiplicity in pp collisions at s=7 TeV abstract: 摘要： The polarizations of the Y(1S), Y(2S), and Y(3S) mesons are measured as a function of the charged particle multiplicity in proton-proton collisions at √s = 7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb–1. The results are extracted from the dimuon decay angular distributions, in two ranges of Y(nS) transverse momentum (10-15 and 15-35 GeV), and in the rapidity interval |y| < 1.2. Furthermore, the results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the Y(2S) and Y(3S) cases. 出版者： United States 出版日期： 2016-10-10 出處： Physics letters. B, 2016-10, Vol.761 (C) 資源來源： Elsevier ScienceDirect Journals Complete 識別號： ISSN: 0370-2693 識別號： DOI: 10.1016/j.physletb.2016.07.065 <br> https://ir.lib.ncu.edu.tw/handle/987654321/108471 title: ϒ(nS) polarizations versus particle multiplicity in pp collisions at s=7 TeV abstract: 摘要： The polarizations of the Y(1S), Y(2S), and Y(3S) mesons are measured as a function of the charged particle multiplicity in proton-proton collisions at √s = 7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb–1. The results are extracted from the dimuon decay angular distributions, in two ranges of Y(nS) transverse momentum (10-15 and 15-35 GeV), and in the rapidity interval |y| < 1.2. Furthermore, the results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the Y(2S) and Y(3S) cases. 出版者： United States 出版日期： 2016-10-10 出處： Physics letters. B, 2016-10, Vol.761 (C) 資源來源： Elsevier ScienceDirect Journals Complete 識別號： ISSN: 0370-2693 識別號： DOI: 10.1016/j.physletb.2016.07.065 <br> https://ir.lib.ncu.edu.tw/handle/987654321/108467 title: X-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles abstract: 摘要： Heralded entanglement between macroscopical samples is an important resource for present quantum technology protocols, allowing quantum communication over large distances. In such protocols, optical photons are typically used as information and entanglement carriers between macroscopic quantum memories placed in remote locations. Here we investigate theoretically a new implementation which employs more robust x-ray quanta to generate heralded entanglement between two crystal-hosted macroscopical nuclear ensembles. Mössbauer nuclei in the two crystals interact collectively with an x-ray spontaneous parametric down conversion photon that generates heralded macroscopical entanglement with coherence times of approximately 100 ns at room temperature. The quantum phase between the entangled crystals can be conveniently manipulated by magnetic field rotations at the samples. The inherent long nuclear coherence times allow also for mechanical manipulations of the samples, for instance to check the stability of entanglement in the x-ray setup. Our results pave the way for first quantum communication protocols that use x-ray qubits. 其他題名： Sci Rep 出版者： London: Nature Publishing Group UK 出版日期： 2016-09-19 出處： Scientific reports, 2016-09, Vol.6 (1), p.33361, Article 33361 資源來源： Springer Nature Link 版權： The Author(s) 2016 版權： Copyright Nature Publishing Group Sep 2016 版權： Copyright © 2016, The Author(s) 2016 The Author(s) 識別號： ISSN: 2045-2322 識別號： EISSN: 2045-2322 識別號： DOI: 10.1038/srep33361 識別號： PMID: 27640348 <br> https://ir.lib.ncu.edu.tw/handle/987654321/108463 title: X-RAY IRRADIATION of H2O + CO ICE MIXTURES with SYNCHROTRON LIGHT abstract: 摘要： ABSTRACT We irradiated a (4:1) mixture of water and carbon monoxide with soft X-rays of energies up to 1.2 keV. The experiments were performed using the spherical grating monochromator beamline at National Synchrotron Radiation Research Center in Taiwan. Both monochromatic (300 and 900 eV) and broader energy fluxes (250-1200 eV) were employed. During the irradiation, the H2O + CO mixture was ionized, excited, and fragmented, producing a number of reactive species. The composition of the ice has been monitored throughout both the irradiation and warm-up phases. We identified several products, which can be related through a plausible chemical reaction scheme. Such chemistry is initiated by the injection of energetic photoelectrons that produce multiple ionization events generating a secondary electron cascade. The results have been discussed in light of a model for protoplanetary disks around young solar-type stars. 其他題名： APJ 其他題名： Astrophys. J 出版者： The American Astronomical Society 出版日期： 2016-03-20 出處： The Astrophysical journal, 2016-03, Vol.820 (1) 資源來源： Institute of Physics Journals 版權： 2016. The American Astronomical Society. All rights reserved. 識別號： ISSN: 0004-637X 識別號： ISSN: 1538-4357 識別號： EISSN: 1538-4357 識別號： DOI: 10.3847/0004-637X/820/1/25 <br>