<i>Structure of the Nucleus</i>

Preston, M. A.; Bhaduri, R. K.; Klein, Abraham

doi:10.1063/1.3023619

Cited by 119 publications

(167 citation statements)

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“…This behavior can be easily understood from eq. (11). The support of the integral is reduced with increasing density reflecting the truncation of momentum space due to Pauli blocking.…”

Section: Finite Densitymentioning

confidence: 99%

K−-proton scattering and the Λ (1405) in dense matter

1994

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The scattering of antikaons with nucleons is studied in the nuclear environment. Describing the Λ(1405) as a K − proton bound state, we find, that due to the Pauli blocking of intermediate states, the mass of the Λ(1405) is shifted upwards in energy, above the K − proton threshold and and its width is somewhat broadened. As a consequence the s-wave K − -nucleon scattering length turns attractive at finite nucleon density (ρ ≥ 0.25ρ 0 ) leading to a mean field potential for the K − of about ∼ −100 MeV in nuclear matter at ground state density. Consequences for Heavy Ion collisions and possible experimental checks for the structure of the Λ(1405) are discussed

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“…This behavior can be easily understood from eq. (11). The support of the integral is reduced with increasing density reflecting the truncation of momentum space due to Pauli blocking.…”

Section: Finite Densitymentioning

confidence: 99%

K−-proton scattering and the Λ (1405) in dense matter

1994

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“…We use Woods-Saxon distributions for the nuclear densities [28] to evaluate the thickness function T AB (b) (or T A for the case of pA collisions) and adjust the impact parameter range to obtain the fraction of inelastic cross section sampled in each experiment. Applying this procedure to the pp results from Pythia we obtain the D meson yield expected for nucleus-nucleus collisions.…”

Section: Extrapolating To Nucleus-nucleus Collisionsmentioning

confidence: 99%

Open charm contribution to dilepton spectra produced in nuclear collisions at SPS energies

1998

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Measurements of open charm hadro-production from CERN and Fermilab experiments are reviewed, with particular emphasis on the absolute cross sections and on their A and √ s dependences. Differential p T and x F cross sections calculated with the Pythia event generator are found to be in reasonable agreement with recent data. The calculations are scaled to nucleusnucleus collisions and the expected lepton pair yield is deduced. The charm contribution to the low mass dilepton continuum observed by the CERES experiment is found to be negligible. In particular, it is shown that the observed low mass dilepton excess in S-Au collisions cannot be explained by charm enhancement.

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“…These models have been successfully applied in the description of nuclear structure phenomena both in β−stable and β−unstable regions throughout the periodic chart. The constant strength scheme is adopted to take care of pairing correlation [32] and evaluated the pairing gaps △ n and △ p for neutron and proton respectively from the celebrity BCS equations [33].…”

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confidence: 99%

Magic Nuclei in Superheavy Valley

Bhuyan

Patra

2012

Mod. Phys. Lett. A

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An extensive theoretical search for the proton magic number in the superheavy valley beyond Z =82 and corresponding neutron magic number after N =126 is carried out. For this we scanned a wide range of elements Z = 112 − 130 and their isotopes. The well established non-relativistic Skryme-Hartree-Fock and Relativistic Mean Field formalisms with various force parameters are used. Based on the calculated systematics of pairing gap, two neutron separation energy and the shell correction energy for these nuclei, we find Z =120 as the next proton magic and N=172, 182/184, 208 and 258 the subsequent neutron magic numbers. Keywords:After the discovery of artificial transmutation of elements by Sir Ernest Rutherford in 1919 [1], the search for new elements is an important issue in nuclear science. The existence of elements beyond the last heaviest naturally occurring 238 U, i.e., the discovery of Neptunium, Plutonium and other 14 elements (transuranium elements), which make a separate block in Mendeleev ′ s periodic table was a revolution in the Nuclear Chemistry. This enhancement in the periodic table raises a few questions in our mind:• Whether there is a limited number of elements that can co-exist either in nature or can be produced from artificial synthesis by using modern technique ?• What is the maximum number of protons and neutrons that of a nucleus ?• What is the next double shell closure nucleus beyond 208 Pb ?To answer these questions, first we have to understand the agent which is responsible to rescue the nucleus against Coulomb repulsion. The obvious reply is the shell energy, which stabilises the nucleus against Coulomb disintegration [2]. Many theoretical models, like the macroscopic−microscopic (MM) calculations to explain involve some prior knowledge of densities, single-particle potentials and other bulk properties which may accumulate serious error in the largely extrapolated mass region of interest. They predict the magic shells at Z=114 and N=184 [3,4,5,6] which could have surprisingly long life time even of the order of a million years [7,8,9,5,10]. Some other such predictions of shell-closure for the superheavy region within the relativistic and non-relativistic theories depend mostly on the force parameters [11,12].Experimentally, till now, the quest for superheavy nuclei has been dramatically rejuvenated in recent years owing to the emergence of hot and cold fusion reactions. In cold fusion reactions involving a doubly magic spherical target and a deformed projectile were used by GSI [13,14,15,16,17] to produce heavy elements upto Z = 110−112. In hot fusion evaporation reactions with a deformed transuranium target and a doubly magic spherical projectile were used in the synthesis of superheavy nuclei Z = 112−118 at Dubna [18,19,20,21,22,23,24]. At the production time of Z = 112 nucleus at GSI the fusion cross section was extremely small (1pb), which led to the conclusion that reaching still heavier elements will be very difficult. At this time, the emergence of hot fusion reactions usi...

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Structure of the Nucleus

Cited by 119 publications

References 0 publications

K−-proton scattering and the Λ (1405) in dense matter

K−-proton scattering and the Λ (1405) in dense matter

Open charm contribution to dilepton spectra produced in nuclear collisions at SPS energies

Magic Nuclei in Superheavy Valley

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