By Carsten Jensen (auth.), Finn Aaserud, Helge Kragh, Erik Rüdinger, Roger H. Stuewer (eds.)

To all 4 people, Carsten used to be the very best good friend and colleague. To Finn, he was once a fellow scholar within the heritage of technological know-how for numerous years on the Niels Bohr Institute; to Relge, he was once a welcome source for private and highbrow interac­ tion in an differently lower than fertile surroundings for the background of technology; Roger was once Carsten's good friend and consultant, now not least within the improvement of the dissertation on which the current e-book is predicated; and as director of the Niels Bohr Archive, Erik used to be his major consultant in his ancient paintings. simply because he was once the individual closest to Carsten's paintings on his Ph. D. dissertation at the historical past of beta decay, on which the current e-book is predicated, it's only becoming that Erik stands as unmarried writer of the phrases in Carsten's reminiscence on the very starting of this ebook. prior to his premature dying presently after the of completion of the Ph. D. disser­ tation, Carsten had himself plans to strengthen the dissertation right into a publication. Being a real perfectionist, he desired to transform the manuscript substantively, particularly with reference to concerning it to the wider dialogue between historians of science.

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3). 36 2. The Rutherford Era, 1911-1919 foreign to the assumed properties of the system. Further, the expulsion of an a-particle can hardly be expected to produce a lasting effect on the stability of the cluster of electrons. The effect of the expulsion will be of two different kinds. Partly the particle may collide with the bound electrons during its passing through the atom. The effect will be analogous to that produced by bombardment of atoms of other substances by a-rays and cannot be expected to give rise to a subsequent expulsion of {3-rays.

J. Phys. L. Sime, Lise Meitner: A Life in Physics (Berkeley: University of California Press, 1996). 34 0. Hahn and L. Meitner, "Uber die Absorption der Beta-Strahlen einiger Radioelemente," Phys. Zeit. 9 (1908), 321-333. , p. 328. , p. 331. , p. 331. 14 Chapter 1. 7: Lise Meitner in the 1920s. 3. Questioning inhomogeneity Concerning the cause of the straight absorption curves, however, they agreed with Schmidt "that the velocity of the beta rays would not change when they passed through matter.

19 She did not, however, mention the nucleus as a conceivable place of origin, and apparently Rutherford, who was present at the conference, saw no reason to draw Curie's attention to that possibility. He himself was at that time convinced that alpha particles came from the nucleus but, as we have seen, in 1912 he still assumed that beta particles originate outside the nucleus. Bohr's hypothesis was not supported merely by the considerations mentioned above. One further argument was stressed by Bohr when he submitted his paper for publication.

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