The History of Early Nuclear Physics (1896 – 1931)

10.1142/1522 ◽  
1992 ◽  
Author(s):  
M Mladjenovic
Keyword(s):  
Author(s):  
Mahmudov Yusup G’anievich ◽  
◽  
◽  

History of great discoveries in physics french scientist AA Beckerel, german physicist VK Rentgen, english physicist, founder of nuclear physics, polish scientists E. Rutherford, french physicists Maria and Pierre Curie, german scientist G. Schmut, Russian chemist D.I. Mendeleev, english physicist and chemist F. Simple, romanian chemist and physicist G.Heveshi, austrian radiochemist and chemist F.Panet, english physicist J.D.Cockroft, Irish physicist E.T.S. Walton, the english physicist-experimenter J. Chedwick, is directly and indirectly associated with the names of the italian scientist E. Fermi.


Author(s):  
David Fisher

It is often taken as a matter of established fact that the difference between a good scientist and a great scientist is the ability to distinguish in advance which problems are going to be the important ones. I think this belief is a reflection of the fact that history is written by the winners: Professor X chooses a problem and with much hard work solves it, but it turns out not to have important consequences, so it and he are forgotten; Professor Y does the same, but this time the result spurs further work or even opens new and unforeseeable regions of science, so he naturally feels that his “intuition” was correct. But how do you distinguish his intuition from a lucky guess? I suggest that a study of the history of science tells us that luck plays a significant part. Consider, for example, Lord Rutherford’s discovery of the nuclear atom—perhaps the most important experimental discovery of the twentieth century, in that it led to quantum theory and the whole of nuclear physics. To set the stage: By the first few years of the twentieth century it had been determined that there were three kinds of radioactive emissions, termed alpha, beta, and gamma rays. The gamma rays were electromagnetic in nature, the beta rays were electrons, and Rutherford had just shown that the alpha rays were in fact helium; or rather, as he put it, the alpha rays were a stream of particles zipping along at roughly 10,000 miles per second which, after they slowed down and lost their electric charge, became helium atoms. (He didn’t realize at the time that they “lost” their positive electric charge by picking up negatively charged electrons.) What next? Well, the natural thing to do was to see how these radioactive emissions interacted with matter. This had already been done with the beta and gamma radiations: a stream of these radiations had been directed at various targets, and such parameters as their depth of penetration and ionizing capabilities had been measured, with no particular insights gained (an example of Professor X’s work).


1991 ◽  
Vol 37 ◽  
pp. 427-444 ◽  

Manne Siegbahn, Nobel laureate for his discoveries and investigations in X-ray spectroscopy, and creator of Sweden’s first research institute for nuclear physics, occupies one of the most honourable places in the history of Swedish experimental physics.


2006 ◽  
Vol 36 (2) ◽  
pp. 311-327 ◽  
Author(s):  
ANA M. RIBEIRO DE ANDRADE ◽  
R.P.A. MUNIZ

ABSTRACT Early efforts to bring particle accelerators into Brazil exemplify the interactions between advanced scientific countries and the periphery in the years 1948––1956 and between the history of science and the history of foreign affairs. The physicists Cesar Lattes, Ernest Lawrence, Herbert Anderson, Isidor Rabi, and Rear Admiral ÁÁlvaro Alberto played central roles in these efforts. The story brings out the role of the military and scientists acting within the Centro Brasileiro de Pesquisas Fíísicas and the Conselho Nacional de Pesquisas to promote nuclear physics research aimed at the development of nuclear technology in Brazil. The decision-making process involved science, politics, secret agreements, and international affairs.


At a Symposium on the History of Nuclear Physics, the distinguished Caltech astrophysicist and recent president of the American Physical Society, Willy Fowler, was asked to comment on the concept of internationalism in science. ‘There are nationalistic tendencies, to be sure’, he responded, ‘but they are subordinated to scientists’ love of travel’. By and large, nationalistic tendencies have been suppressed, if not in favour of hedonism, then surely in deference to hymns of praise to the brotherhood of science.


Author(s):  
Jordan Gowanlock

AbstractThis chapter of Animating Unpredictable Effects charts the development of the software tools used to create uncanny simulation-based digital animations, drawing a genealogy that starts with nineteenth century mathematics, which were transformed into management and prediction tools by private and military R&D between the 1940s and 1980s. Through this, the chapter identifies a connection between these animation tools and simulation tools used in fields as diverse as meteorology, nuclear physics, and aeronautics that create unpredictability through stochastic or dynamic simulation. Using this information, the chapter offers a theoretical framework for understanding how fictional simulations in animation and visual effects make meaning through “knowing how” as opposed to cinema’s tradition approach of “knowing that,” leveraging concepts from the history of science.


2020 ◽  
Vol 88 (1) ◽  
pp. 131-138
Author(s):  
F. V. Motsnyi

In this work, three fundamental discoveries of the Ukraine-born Prof. George A. Gamow are presented from a single scientific and methodological point of view. Each of them is truly worth of the Nobel Prize – the most prestigious recognition of achievements of a scientist. We trace the emergence of G. Gamow as one of the most outstanding scientists of the twentieth century – encyclopaedist, theoretical physicist by heart, astrophysicist and biophysicist, talented and brilliant popularizer of science, whose works are readable in one go, as well as the author of unforgettable pranks and jokes. Gamow was a Fellow of the Danish Royal Academy of Sciences, the American Academy of Arts and Sciences, the International Astronomical Union, the American Physical Society, an honorary doctor of countless universities. Although his name is little known in Ukraine, the history of science would be incomplete without him. From an early age G. Gamow has shown a great interest in scientific research, using a microscope to look for erythrocytes and a telescope to observe the Halley comet. He graduated from the Faculty of Physics and Mathematics of Leningrad State University, where he followed classes of Professor O. Friedman, founder of the evolutionary cosmology. He has undergone training at the University of Goettingen, the center of theoretical physics at the time, worked for Nobel Prize winners Professors E. Rutherford and N. Bohr. At the age of 28, G. Gamow, by the recommendation of academician V. Vernadskyi, became the member of the Academy of Sciences of USSR, the youngest member in the entire history of its existence. Throughout his life, G. Gamow was interested in the fundamental scientific problems and made numerous world-class discoveries that are written by golden letters in the treasury of the human civilization. He has found explanation to the E. Rutherford’s experiments with alpha particles (tunnelling effect); introduced the empirical formula of Geiger – Nettoll, connecting the energy of alpha particles to the half-life of radioactive nuclei. G. Gamow is one of the pioneers of the liquid-drop model of a nucleus, and the application of nuclear physics to the evolution of stars. He proposed a fantastic hypothesis about the early universe, suggesting it being not only super dense but also very hot. He also built the Big Bang theory, which led to the existence of relic radiation (space microwave background) with the characteristic temperature of 5–7 degrees above the absolute zero, detected by methods of radio astronomy. He proposed a triplet model of the genetic code - the alphabet of life with three-letter words, experimentally proven by X-ray structural studies of DNA and empirically established rules of E. Chargaff. These discoveries have greatly contributed not only to the development of the modern science, but to the industrial and economic expansion of humanity.


I am very privileged to be the first Rutherford Memorial Lecturer, and particularly so because I have been able to come to Rutherford’s homeland and to this city of Christchurch to pay this tribute to his genius. I have been fortunate in many things in my life, but most of all in working first as a student and then as a colleague of this great countryman of yours, for a period of 15 years. The history of Nuclear Physics is very largely the history of the work of Rutherford and his schools. You will remember that he left New Zealand in the summer of 1895 with an 1851 Studentship to Cambridge to work under Professor J. J. Thomson. Already, in the first term, he gave a lecture to the Cavendish Physical Society on his early work on electromagnetic rays. He received radio signals at ranges of half a mile and might have been a great pioneer in wireless had he continued in this field. ‘There is a rabbit here from the Antipodes’, wrote a Cambridge scientist ‘and he is burrowing mighty deep.’ Fortunately for science Rutherford turned to work in the new field of radioactivity which had been opened up by Becquerel’s discovery that pitchblende gave out radiations which could fog a photographic plate. After a year in the Cavendish he wrote to his fiancée, Mary Newton—now Lady Rutherford—whom we are honoured to have with us to-night:


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