Latest results from PHOBOS

Hofman, D. J.

doi:10.1088/0954-3899/34/8/s06

Cited by 8 publications

(7 citation statements)

References 20 publications

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“…However, two-component picture which involves with the participant nucleon eccentricity (ǫ part ) . 215,216 Further, elliptic flow scaled with ǫ part for the same number of participating nucleons in Cu − Cu and Au − Au system show a scaling pattern upto 3.5 GeV /c in p T and across ±5 units of pseudo-rapidity. 215,216 Thus, it will definitely be interesting to investigate these fluctuations and correlations in future to draw a more consistent and unified picture of particle production and their evolution in heavy-ion collisions.…”

Section: Discussionmentioning

confidence: 90%

Charged Hadron Multiplicity Distribution at Relativistic Heavy-Ion Colliders

Kumar

Srivastava

Singh

et al. 2013

Advances in High Energy Physics

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The present article reviews facts and problems concerning charge hadron production in high energy collisions. Main emphasis is laid on the qualitative and quantitative description of general characteristics and properties observed for charged hadrons produced in such high energy collisions. Various features of available experimental data e.g., the variations of charged hadron multiplicity and pseudo-rapidity density with the mass number of colliding nuclei, center-of-mass energies and the collision centrality obtained from heavy-ion collider experiments are interpreted in the context of various theoretical concepts and their implications. Finally, several important scaling features observed in the measurements mainly at RHIC and LHC experiments are highlighted in the view of these models to draw some insight regarding the particle production mechanism in heavy-ion collisions.

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Section: Discussionmentioning

confidence: 90%

Charged Hadron Multiplicity Distribution at Relativistic Heavy-Ion Colliders

Kumar

Srivastava

Singh

et al. 2013

Advances in High Energy Physics

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“…During in-pile irradiation, a microstructural change termed "recrystallization" was observed in U-Mo alloys irradiated to a fission density > 3×10 21 fissions/cm 3 [7][35] [36], similar to the "rim effect" or "high burn-up structure (HBS)" found in the radial peripheral region of high burnup UO 2 fuel rods [37]. SEM images of the fracture surface of irradiated U-Mo fuels show that new small grains started to nucleate at prior cell boundaries [35], accompanied by the formation of a large number of intergranular bubbles.…”

Section: Radiation-induced Grain Subdivisionmentioning

confidence: 99%

Cross section TEM characterization of high-energy-Xe-irradiated U-Mo

Jamison

Miao

et al. 2017

Journal of Nuclear Materials

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U-Mo alloys irradiated with 84 MeV Xe ions to various doses were characterized with transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM) techniques. The TEM thin foils were prepared perpendicular to the irradiated surface to allow a direct observation of the entire region modified by ions.Therefore, depth-selective microstructural information was revealed. Varied irradiation-induced phenomena such as gas bubble formation, phase reversal, and recrystallization were observed at different ion penetration depths in U-Mo.

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“…In particular, extension of RHIC beams to smaller colliding systems such as Cu − Cu have allowed us to compare systems of similar multiplicity but in very different energy regimes. The results have been remarkable: It seems that v 2 /ǫ (where ǫ is the initial eccentricity), plotted against dN Sdy (where S is the area of the collision system and dN dy is the multiplicity rapidity density), fall on a "universal" curve, which links very different regimes, ranging from Alternating Gradient Synchrotron (AGS) to RHIC ( [17,18], Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Scaling ofv2in heavy ion collisions

Torrieri

2007

Phys. Rev. C

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We interpret the scaling of the corrected elliptic flow parameter w.r.t. the corrected multiplicity, observed to hold in heavy ion collisions for a wide variety of energies and system sizes. We use dimensional analysis and power-counting arguments to place constraints on the changes of initial conditions in systems with different center of mass energy √ s. Specifically, we show that a large class of changes in the (initial) equation of state, mean free path, and longitudinal geometry over the observed √ s are likely to spoil the scaling in v2 observed experimentally. We therefore argue that the system produced at most Super Proton Synchrotron (SPS) and Relativistic Heavy Ion Collider (RHIC) energies is fundamentally the same as far as the soft and approximately thermalized degrees of freedom are considered. The "sQGP" (Strongly interacting Quark-Gluon Plasma) phase, if it is there, is therefore not exclusive to RHIC. We suggest, as a goal for further low-energy heavy ion experiments, to search for a "transition" √ s where the observed scaling breaks.

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Latest results from PHOBOS

Cited by 8 publications

References 20 publications

Charged Hadron Multiplicity Distribution at Relativistic Heavy-Ion Colliders

Charged Hadron Multiplicity Distribution at Relativistic Heavy-Ion Colliders

Cross section TEM characterization of high-energy-Xe-irradiated U-Mo

Scaling ofv2in heavy ion collisions

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