Global ETD Search

121	Irradiation and Annealing Behaviour of Heavy Ion Implanted Silicon by TEM and the Channeling Backscattering Technique (Part B) Haugen, Harold K. 12 1900 (has links) One of two project reports. Part A can be found at: http://hdl.handle.net/11375/18522 / Recent channeling-backscattering measurements of the disorder induced by heavy ion irradiation of semiconductors has indicated radiation damage far in excess of that predicted by linear transport theory. The present work extends the investigation to TEM and compares the two techniques in an annealing study of ion irradiated silicon (~ 80-200 a.m.u. ions of 15-100 keV) for low fluence (typically 3×10¹¹/cm² for TEM and 10¹²-10¹³/cm² for channeling) bombardment. In addition to showing a good correlation between the techniques, the results indicate that neither does there exist a unique relationship between lattice disordering and cascade energy density, nor that a well defined amorphous structure seems to exist. / Thesis / Master of Engineering (ME) engineering physics irradiation annealing behaviour heavy ion implanted silicon TEM channeling backscattering technique
122	Measurement of f0(980) Elliptic Flow in Proton-Lead Collisions at the Large Hadron Collider and Its Possible Quark Content An Gu (17593179) 07 December 2023 (has links) <h4>Exotic hadrons are hadrons with constituent quark content different from the normal meson and baryon. The f<sub>0</sub>(980) hadron is one of the exotic hadron candidates, which was first discovered in $\pi\pi$ scattering experiments in the 1970's. It could be a ordinary quarnk-antiquark meson, a tetraquark exotic state, a kaon-antikaon molecule, or a quark-antiquark-gluon hybrid state.</h4><p dir="ltr">Anisotropic flow (v<sub>n</sub>) is a powerful tool to probe the dynamics of relativistic heavy ion collisions. The observed approximate scaling of v<sub>n</sub> by the number of constituent quarks (NCQ) suggests the importance of partonic degree of freedom in these collisions. Large v<sub>n</sub> and NCQ-scaling have also been observed in high-multiplicity proton-lead (pPb) collisions at the LHC, suggesting similar dynamics in pPb collisions. The empirically established NCQ-scaling can be exploited to probe the constituent quark content of the f<sub>0</sub>(980) hadron.</p><p dir="ltr">We measure the elliptic flow (v<sub>2</sub>) of f<sub>0</sub>(980) in high-multiplicity pPb collisions at 8 TeV with the Compact Muon Solenoid (CMS) detector at the LHC, through its main pion-pion ($\pi^+\pi^-$) decay channel. The invariant mass spectrum is obtained from opposite sign pion pairs, and the combinatorial background is estimated by same-sign pion pairs and subtracted. The f<sub>0</sub>(980) signal and the remaining residual background are modeled by relativistic Breit-Wigner and polynomial functions, respectively. The yield of f<sub>0</sub>(980) is extracted as a function of azimuthal angle relative to the event plane, and the f<sub>0</sub>(980) v<sub>2</sub> is measured as function of $p_T$, corrected for the event-plane resolution. The non-flow component in f<sub>0</sub>(980) v<sub>2</sub> has been estimated by that of K<sub>s</sub><sup>0</sup>. By comparing the measured v<sub>2</sub> of the f<sub>0</sub>(980) to those of other hadrons, we infer the number of constituent quarks for the f<sub>0</sub>(980) assuming NCQ scaling. The f<sub>0</sub>(980) is found to be a 2-quark state in this work. We discuss the systematic uncertainties involved in our study, implications of our result, and possible future works in this endeavor.</p> Nuclear physics Heavy Ion Collisions Anisotropy Flow Exotic Hadron f0(980) NCQ Scaling
123	Phenomenological Predictions for Uranium + Uranium Collisions at RHIC Nepali, Chandra Shekhar 11 April 2008 (has links) No description available. Nuclear Physics Uranium Uranium Collisions Heavy Ion CollIons Quark Gluon Plasma
124	Non-photonic Electron Distributions at Pseudo-rapidities Between 1.1 and 1.5 in Proton-Proton Collisions at √s=200 GeV at Relativistic Heavy Ion Collider Subba, Naresh L. 19 July 2010 (has links) No description available. Nuclear Physics charm quark non-photonic electrons endcap electro-magnetic calorimeter relativistic heavy ion collider
125	AZIMUTHAL ANISOTROPY IN HEAVY ION COLLISIONS Pandit, Yadav 27 November 2012 (has links) No description available. Nuclear Physics Heavy ion collisions collective motion flow azimuthal anisotropy phase transition QGP
126	Direct Photon - Hadron Correlations Measurement in Au+Au Collision at NucleonCenter-Of-Mass Energy of 200 GeV With Isolation Cut Methods Riveli, Nowo 24 September 2014 (has links) No description available. Physics heavy ion collision photon - hadron correlation jet modification RHIC PHENIX
127	Measurement of Elliptic Flow Coefficients and Derivation of Reaction Plane Dependent Efficiency of Isolated Photons and ϖ<sup>0</sup> in Center-of-Mass Pair Energy 200 GeV Au+Au Collisions at RHIC-PHENIX Danley, Tyler January 2014 (has links) No description available. Physics Particle Physics PHENIX elliptic flow RHIC, Heavy Ion Collisions Gold flow
128	PERFORMANCE OF THE HEAVY FLAVOR TRACKER (HFT) DETECTOR IN STAR EXPERIMENT AT RHIC Alruwaili, Manal Abluk 24 November 2015 (has links) No description available. Nuclear Physics Physics
129	Measurement of charmed meson azimuthal anisotropy in Au+Au collisions at a center of mass energy of 200 GeV per nucleon pair at RHIC Lomnitz, Michael Richard 14 November 2016 (has links) No description available. Nuclear Physics Physics Nuclear Physics Heavy Ion Collisions Quark Gluon Plasma Heavy Flavor RHIC
130	Transport Coefficients of Interacting Hadrons Wiranata, Anton January 2011 (has links) No description available. Physics Shear Viscosity bulk Viscosity Chapman-Enskog Approximation Relaxation Time Approximation Relativistic Heavy Ion Collisions

Search results