Vaizdas:PositronDiscovery.jpg
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Šios peržiūros dydis: 608 × 599 taškų. Kitos 5 rezoliucijos: 243 × 240 taškų | 487 × 480 taškų | 779 × 768 taškų | 1 039 × 1 024 taškų | 2 408 × 2 374 taškų.
Pradinė rinkmena (2 408 × 2 374 taškų, rinkmenos dydis: 1,91 MiB, MIME tipas: image/jpeg)
Aprašymas
| Aprašymas |
English: Cloud chamber photograph of the first positron ever observed. The thick horizontal line is a lead plate. The positron entered the cloud chamber in the lower left, was slowed down by the lead plane, and curved to the upper left. The curvature of the path is caused by an applied magnetic field that acts perpendicular to the image plane. The higher energy of the entering positron resulted in lower curvature of its path. Original caption: A 63 million volt positron (Hρ = 2.1×105 gauss-cm) passing through a 6 mm lead plate and emerging as a 23 million volt positron (Hρ = 7.5×104 gauss-cm). The length of this latter path is at least ten times greater than the possible length of a proton path of this curvature. |
| Data | Photographed 1932 m. rugpjūčio 2 d.. Published 1933 m. kovo 15 d.. |
| Šaltinis | Anderson, Carl D. (1933). "The Positive Electron". Physical Review 43 (6): 491–494. DOI:10.1103/PhysRev.43.491. |
| Autorius | Carl D. Anderson (1905–1991) |
| Leidimas (Šios rinkmenos panaudojimas kitur) |
Obtained from American Physical Society, March 5, 2008. The copyright for the periodical containing this picture, if renewed, would have had to be renewed in 1960 or 1961. I checked the Catalog of copyright entries for Periodicals in 1960 and 1961, http://onlinebooks.library.upenn.edu/cce/, but The Physical Review is not listed there. Therefore, the copyright on the entire issue of The Physical Review, including this picture, has expired. |
Licencija
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This work is in the public domain because it was published in the United States between 1930 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs.
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| Data/Laikas | Miniatiūra | Matmenys | Naudotojas | Paaiškinimas | |
|---|---|---|---|---|---|
| dabartinis | 20:12, 6 gegužės 2013 | | 2 408 × 2 374 (1,91 MiB) | wikimediacommons>Quibik | Combined with a moire- and halftone-free but blurrier version that was also provided in the article. Much more accurate now. |
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