XXth century_physics
XXth century_physics XXth century_physics
Clinton Davisson and Lester Germer Electron diffraction observed by reflection from nickel crystals (1927)
”The investigation reported in this paper was begun as the result of an accident which occured in this laboratory in April 1925. At that time we were continuing an investigation, first reported in 1921 [Davisson & Kunsman, Science 64, 522 (1921)], of the distribution-in-angle of electrons scattered by a target of ordinary (polycrystalline) nickel. During the course of this work a liquid-air bottle exploded at a time when the target was at a high temperature; the experimental tube was broken, and the target heavily oxidized by the inrushing air. The oxide was eventually reduced and a layer of the target removed by vaporization, but only after prolonged heating at various temperatures in hydrogen and vacuum. When the experiments were continued it was found that the distribution-in-angle of the scattered electrons had been completely changed... We must admit that the results obtained in these experiments have proved to be quite at variance with our expectations.” C. Davisson & L. H. Germer, Phys.Rev. 30, 705 (1927)
- Page 15 and 16: Attenuation of radiation for rings
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- Page 19 and 20: H. Geiger - On the Scattering of th
- Page 21: Proc. Roy. Soc. 82, 495 (1909)
- Page 24 and 25: In the ”plum-pudding” model of
- Page 26 and 27: "Consider an atom which contains a
- Page 28 and 29: ”...considering the enormous vari
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- Page 36 and 37: Bohr found excellent description of
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- Page 52 and 53: Wojciech (Adalbert) Rubinowicz (188
- Page 54 and 55: Solvay Conference 1921
- Page 56 and 57: Arthur Holly Compton (1892-1962) Co
- Page 58 and 59: Compton’s data [(Phys. Rev.19, 26
- Page 60 and 61: Compton effect
- Page 62 and 63: The crisis of the quantum theory
- Page 64 and 65: Louis de Broglie
- Page 68 and 69: George P. Thomson Electron diffract
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- Page 72 and 73: Heisenberg to Pauli (July 9, 1925)
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”The investigation reported in this paper was begun as the result<br />
of an accident which occured in this laboratory in April 1925. At<br />
that time we were continuing an investigation, first reported in<br />
1921 [Davisson & Kunsman, Science 64, 522 (1921)], of the<br />
distribution-in-angle of electrons scattered by a target of ordinary<br />
(polycrystalline) nickel. During the course of this work a liquid-air<br />
bottle exploded at a time when the target was at a high<br />
temperature; the experimental tube was broken, and the target<br />
heavily oxidized by the inrushing air. The oxide was eventually<br />
reduced and a layer of the target removed by vaporization, but<br />
only after prolonged heating at various temperatures in hydrogen<br />
and vacuum.<br />
When the experiments were continued it was found that the<br />
distribution-in-angle of the scattered electrons had been<br />
completely changed...<br />
We must admit that the results obtained in these experiments<br />
have proved to be quite at variance with our expectations.”<br />
C. Davisson & L. H. Germer, Phys.Rev. 30, 705 (1927)
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