Proton resonances in<sup>26</sup>Al

Adams, G. S.; Bilpuch, E.G.; Mitchell, G. E.; Nelson, R. O.; Westerfeldt, C. R.

doi:10.1088/0305-4616/10/12/013

Cited by 104 publications

(120 citation statements)

References 14 publications

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“…The initial RHIC running periods has resulted in the discovery that top energy HI collisions produce a strongly coupled, partonic near-perfect fluid (an sQGP) [1][2][3][4]. Data from RHIC polarized proton collisions have set new upper limits on the gluon contribution to proton spin [5][6][7].…”

Section: Physics Accomplishmentsmentioning

confidence: 99%

The Future of RHIC

O’Brien¹

2009

AIP Conference Proceedings

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The Relativistic Heavy Ion Collider at BNL is in the middle of a multi-year upgrade program to prepare the facility for its second decade of operation. Upgrades to improve the accelerator luminosity, proton polarization and the physics capabilities of the PHENIX and STAR experiments will continue for the next 4-5 years. Accompanying the facility and experiment upgrades is an expansion of RHIC physics program into new areas of QCD associated with exploration of the properties of the sQGP, components of proton spin, gluon saturation and a search for the QCD critical point.

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Section: Physics Accomplishmentsmentioning

confidence: 99%

The Future of RHIC

O’Brien¹

2009

AIP Conference Proceedings

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“…The necessary p+p reference spectra of charged hadrons, π 0 , K 0 s , protons, and Λ were measured successfully by the RHIC experiments [33,59,60]. R AA´pT µ is unity if Au+Au is an incoherent superposition of p+p collisions.…”

Section: Suppression Of High-p T Particlesmentioning

confidence: 99%

“…Direct photons can serve exactly this purpose since, once produced, do not interact again with the surrounding matter. Furthermore, the suppression is not seen in d+Auproving experimentally that it results not from nuclear effects in the initial state (in particular, gluon saturation) but from the final state interaction of hard scattered partons in the dense medium generated in Au+Au collisions [59,33,63,64]. Hence photons produced directly from initial parton scatterings will not be quenched unless the initial parton distributions are suppressed in the nucleus.…”

Section: Suppression Of High-p T Particlesmentioning

confidence: 99%

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Where are we in the search for the Quark Gluon Plasma?

Ullrich¹

2006

AIP Conference Proceedings

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The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory was completed in 1999, with the first data-taking runs in the summer of 2000. Since then the measurements at RHIC have yielded a wealth of data from four independent detectors: BRAHMS, PHENIX, PHOBOS, and STAR. For the first time, collisions of heavy nuclei have been carried out with colliding-beam energies that have previously been accessible only to high-energy physics experiments. It is at these high energies that the predictions of QCD come into play and new phenomena are sought that may illuminate our view of the basic structure of matter.The RHIC experiments have recorded data from collisions of gold nuclei from Ô s NN 19 GeV up to the highest energy of 200 GeV, as well as reference data in proton-proton and deuteron-gold collisions. These collisions result in final states of unprecedented complexity, with thousands of produced particles radiating from the nuclear collision.The early measurements have revealed compelling evidence for the existence of a new form of nuclear matter at extremely high density and temperature. This medium allows for the predictions of QCD to be tested, and new phenomena explored, under conditions where the relevant degrees of freedom, over nuclear volumes, are expected to be those of quarks and gluons, rather than of hadrons. This is the realm of the quark gluon plasma.However, detailed analyses of the data also make it clear that this hot, dense medium has properties that are surprising, and not yet fully understood in terms of the early expectations for the quark gluon plasma. In this paper I review the major findings of the RHIC experiments to date and discuss the current understanding of the state of matter created.

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“…The single-particle energies e(lds/2) =-3948 keV, e(2s~/2) = -3164keV and e(ld3/2) = 1647 keV, and the 63 two-body matrix elements (the latter taken proportional to A 0.3) have been obtained (6) 15.0 (6) 0 10.2 (7) 14.7 (7) 0(+1) 2.1 (7) 6.6 (7) 0 30.2 (6) 2.9 (6) 1 1.1 (10) 19.4(10) 0 1.7 (7) 23.0 (7) 0 3.3 (6) 21.5 (6) 0 0.0 (8) 4.0 (8) 0 2.9 (6) 10.0 (6) 0(+1) 0.8 (6) 22.2 (6) 0 3.4 (6) 33.2 (6) 0 5.7 (7) 14.9 (7) 0(+1) 8.1 (7) 78.2 (7) 0 4.8 (7) 4.3 (7) 1(+0) 83.2 (6) 2.5 (6) 1 1.3 (7) 10.0 (7) 0 101.1 (7) 4.6 (7) 1 36.9 (6) 1.5 (6) 1 79.9 (6) 4.8 (6) 1 20.1 (7) 3.8 (7) 1 1.0 (7) 43.5 (7) 0 12.2 (8) 3.9 (8) 1 3.9 (8) 9.1 (8) 0 1.5 (7) 32.2 (7) 0 40.1 (6) 3.3 (6) 1 23.3 (7)…”

Section: The Shell Model; States and Energiesmentioning

confidence: 99%

Spins, parities and isospins of 26Al levels: Shell-model aspects

et al. 1988

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Abstract:Two preceding papers on the 25Mg(p, y)26Al reaction have presented information on the energies, y-ray branchings, lifetimes and resonance partial widths of 26A1 states in the E x= 0-8.1 MeV region. These data (combined with information from other reactions) provide new J=; T assignments to 127 levels (of which 111 assignments are unambiguous), as discussed in the present paper.The states obtained from a shell-model calculation in the untruncated sd-shell are found to correspond one-to-one with the 30 lowest T = 1 and the 42 lowest T = 0 even-parity states; for many higher T = 0 states the correspondence could also be established.An extensive comparison has been made of experimental and calculated y-ray strengths. On the average E2 m strengths are calculated correctly, whereas M l~v strengths are high by a factor 1.85. For many levels the decay strengths are in excellent agreement, whereas the poor agreement for some pairs of neighbouring levels with the same J" ; T value could be ascribed to a poor description of the configuration mixing. In some cases the strength comparison has helped to establish the correspondence between calculated and experimental states.A comparison has also been made between T = 1 levels of 26A1 and 26Mg. For one (out of 44) 26A1 states the 26Mg parent is unknown, whereas for one 26Mg level the analogue in 26A1 has not been identified.

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Proton resonances in²⁶Al

Cited by 104 publications

References 14 publications

The Future of RHIC

The Future of RHIC

Where are we in the search for the Quark Gluon Plasma?

Spins, parities and isospins of 26Al levels: Shell-model aspects

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Proton resonances in26Al

Cited by 104 publications

References 14 publications

The Future of RHIC

The Future of RHIC

Where are we in the search for the Quark Gluon Plasma?

Spins, parities and isospins of 26Al levels: Shell-model aspects

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Product

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Proton resonances in²⁶Al