Institution
Brookhaven National Laboratory
Facility•Upton, New York, United States•
About: Brookhaven National Laboratory is a facility organization based out in Upton, New York, United States. It is known for research contribution in the topics: Quantum chromodynamics & Scattering. The organization has 18828 authors who have published 39450 publications receiving 1782061 citations. The organization is also known as: BNL.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, a two-body central force was devised which matched the elastic moduli, was sharply repulsive at close separation, and went to zero midway between the second and third neighboring atoms.
Abstract: Tile migration energies and atomic configurations for mono- and di-interstitials and mono- and di-vacancies in α-iron have been calculated using a classical model. About 530 atoms surrounding the defect were treated as individual particles, each with three degrees of freedom, while the remainder of the crystal was treated as an elastic continuum with atoms imbedded in it. A two-body central force was devised which matched the elastic moduli, was sharply repulsive at close separation, and which went to zero midway between the second and third neighboring atoms. Configurations were found by choosing a starting configuration roughly approximating the situation under consideration and successively adjusting the value of each variable occurring in the energy equation so that the magnitude of the generalized force associated with it was zero until equilibrium was reached. Tile energy calculations include changes in bond energy in the discrete region, energy in the elastic field, and work done against cohesive forces, but neglect changes due to the redistribution of electrons. Calculated activation energies for motion of mono- and di-interstitials and mono- and di-vacancies were 0.33 eV, 0.18 eV, 0.68 eV and 0.66 eV respectively, and binding energies of di-interstitials and di-vacancies were 1.08 eV and 0.20 eVmore » respectively. The stable interstitial was a split configuration in which two atoms were symmetrically split in a (110) direction about a vacant normal lattice site, and the stable di-interstitial consisted of two parallel split interstitials at nearest neighbor lattice sites.with their axes perpendicular to the line joining their centers. In the vacancy configuration an atom was missing from a normal lattice site, and the di-vacancy consisted of two vacancies at second nearest neighbor lattice sites. (auth)« less
599 citations
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TL;DR: In this paper, a two-body central force was devised which matched the elastic moduli, was sharply repulsive at close separation, and went to zero midway between the second and third neighboring atoms.
Abstract: Tile migration energies and atomic configurations for mono- and di-interstitials and mono- and di-vacancies in α-iron have been calculated using a classical model. About 530 atoms surrounding the defect were treated as individual particles, each with three degrees of freedom, while the remainder of the crystal was treated as an elastic continuum with atoms imbedded in it. A two-body central force was devised which matched the elastic moduli, was sharply repulsive at close separation, and which went to zero midway between the second and third neighboring atoms. Configurations were found by choosing a starting configuration roughly approximating the situation under consideration and successively adjusting the value of each variable occurring in the energy equation so that the magnitude of the generalized force associated with it was zero until equilibrium was reached. Tile energy calculations include changes in bond energy in the discrete region, energy in the elastic field, and work done against cohesive forces, but neglect changes due to the redistribution of electrons. Calculated activation energies for motion of mono- and di-interstitials and mono- and di-vacancies were 0.33 eV, 0.18 eV, 0.68 eV and 0.66 eV respectively, and binding energies of di-interstitials and di-vacancies were 1.08 eV and 0.20 eVmore » respectively. The stable interstitial was a split configuration in which two atoms were symmetrically split in a (110) direction about a vacant normal lattice site, and the stable di-interstitial consisted of two parallel split interstitials at nearest neighbor lattice sites.with their axes perpendicular to the line joining their centers. In the vacancy configuration an atom was missing from a normal lattice site, and the di-vacancy consisted of two vacancies at second nearest neighbor lattice sites. (auth)« less
599 citations
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599 citations
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TL;DR: The results show that the multi-frequency temporal phase unwrapping provides the best unwrapped reliability, while the multi -wavelength approach is the most susceptible to noise-induced unwrappers errors.
598 citations
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TL;DR: The Mt Mitchell as discussed by the authors operated in the Gulf, Strait of Hormuz, and Gulf of Oman from February to June 1992, with seven separate legs, six official legs and on unofficial leg on the homeward journey, four were devoted primarily to physical oceanographic measurements.
592 citations
Authors
Showing all 18948 results
Name | H-index | Papers | Citations |
---|---|---|---|
H. S. Chen | 179 | 2401 | 178529 |
Nora D. Volkow | 165 | 958 | 107463 |
David H. Adams | 155 | 1613 | 117783 |
Todd Adams | 154 | 1866 | 143110 |
Jay Roberts | 152 | 1562 | 120516 |
Jongmin Lee | 150 | 2257 | 134772 |
Andrew White | 149 | 1494 | 113874 |
Th. Müller | 144 | 1798 | 125843 |
Alexander Milov | 142 | 1143 | 93374 |
Alexander Belyaev | 142 | 1895 | 100796 |
Gunther Roland | 141 | 1471 | 100681 |
Mingshui Chen | 141 | 1543 | 125369 |
David Lynn | 139 | 1044 | 90913 |
Kaushik De | 139 | 1625 | 102058 |
Xin Chen | 139 | 1008 | 113088 |