Mcmillan edwin m (6 Ergebnisse)

Zustand: New. In English.

Zustand: New. In English.

Taschenbuch. Zustand: Neu. Neuware - This book presents a mathematical analysis of the long-term stability of particle orbits in various contexts, such as in accelerators and in particle storage rings. The authors, Edwin M McMillan, Jurgen Moser, and L. Jackson Laslett, use symplectic and other techniques to analyze the motion of particles and to derive conditions for stability. This is an important reference for physicists and engineers working with particle accelerators and storage rings.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the 'public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.…

28.5 cm, gebundene Ausgabe. Zustand: Gut. 334 S. mit Abb. Lese- und Lagerspuren, Einband berieben, bestossen und ohne Schutzumschlag, Schnitt angestaubt, Besitzvermerk auf Vorsatz / Gutes Exemplar / NW.Physik A-Z 22438 NW.Physik Sprache: Englisch Gewicht in Gramm: 2500.

Zustand: Good. Preface by Edwin M. McMillan. 4to. 68 pp., illus. Very good in wraps, prev. owner's name on cover.

First Edition. Offprint, 8vo (267 × 200mm), p. 1, printed on the recto only. Some short marginal tears and old tape stains, else very good. Signed by McMillan. This single-page note, dated February 17, 1939, from Berkeley's Radiation Laboratory, was published within weeks of Hahn and Strassmann's announcement of uranium fission and belongs to the intense, disorienting period in which laboratories around the world were racing to characterize what neutron bombardment of uranium actually produced. The field had not yet stabilized: the identities, ranges, and decay properties of the activation products were still being sorted experimentally, and the theoretical framework for understanding fission was still being assembled. This paper is significant both as a primary document of that moment and as the opening move in the line of investigation that would lead McMillan, the following year, to the discovery of neptuniumthe first transuranium element and the achievement for which he shared the Nobel Prize in Chemistry in 1951. Investigating the radioactive recoil products generated by cyclotron neutron irradiation of uranium oxide, McMillan stacks thin aluminum foils in contact with the target during bombardment and measures the distribution of induced activity across successive foils as a function of depth. The resulting absorption profile is interpreted as evidence for recoiling fission fragments with a finite range estimated at 2.2 ± 0.2 cm air-equivalent. Decay analysis resolves two principal components: a short-lived activity of approximately 25 minutes, tentatively associated with a uranium isotope produced by resonance neutron capture as identified by Hahn, Meitner, and Strassmann, and a longer-lived component of roughly two days. McMillan observes that the total recoil activity is comparable in magnitude to the residual activity remaining in the uranium sample itself, and argues that a sufficiently finely divided uranium preparation would permit physical separation of the recoiling fragments from the non-recoiling activation products; a methodological inference that points directly toward the experimental approach he would employ in isolating neptunium the following year.…