Thomas, Llewellyn

Tennyson Jonathan, 154 Teukolski Saul A., 370 Thom Rene, 671 Thomas Llewellyn Hilleth, 665 Thomson George, 13 Thomson Joseph John, 6-7 Tildesley Dominic J., 6 Timmerman Peter, 978 Tiomkin Mikhail, 722 Tomonaga Shinichiro, 3,... 

In 1926 Llewellyn Thomas proposed treating the electrons in an atom by analogy to a statistical gas of particles. Electron-shells are not envisaged in this model, which was independently rediscovered by Enrico Fermi two years later. For many years the Thomas-Fermi method was regarded as a mathematical curiosity without much hope of application since the results it yielded were inferior to those obtained by the method based on electron orbitals.17... 

Now, Professor L. H. [Llewellyn Hilleth] Thomas was in the department - he was a good theorist, known for the Thomas effect in electron precession... 

Jehane Raga i % Thomas Poyet Isabelle Beurroies Fran9oise Rouquerol and Philip Llewellyn... 

The idea of treating electrons in metal as an electron gas was conceived in 1900, independently Lord Kelvin and by Paul Drude. The concept explained the electrical conductivity of metals, and was then used by Llewellyn Hilleth Thomas in The Calculation of Atomic Fields published in Proceeding of the Cambridge Philosophical Society, 23 (1926)... 

Thomas LH (1949). Elliptic problems in linear equations over a network. Special Collection Dept, of the North Carolina State Univ. Libraries, the Llewellyn Hilleth Thomas Papers 1921-1989, item 210.8-13.8... 

Dawson, TP, Neal, JW, Llewellyn, L, and Thomas, C. 2003. Neuropathology Techniques. London, Arnold, pp. 135-138. 

In 1926 the physicist Llewellyn Thomas proposed treating the electrons in an atom by analogy to a statistical gas of particles. No electron-shells are envisaged in this model which was independently rediscovered by Italian physicist Enrico Fermi two years later, and is now called the Thomas-Fermi method. For many years it was regarded as a mathematical curiosity without much hope of application since the results it yielded were inferior to those obtained by the method based on electron orbitals. The Thomas-Fermi method treats the electrons around the nucleus as a perfectly homogeneous electron gas. The mathematical solution for the Thomas-Fermi model is universal , which means that it can be solved once and for all. This should represent an improvement over the method that seeks to solve Schrodinger equation for every atom separately. Gradually the Thomas-Fermi method, or density functional theories, as its modem descendants are known, have become as powerful as methods based on orbitals and wavefunctions and in many cases can outstrip the wavefunction approaches in terms of computational accuracy. 

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