Download or read book Otto Hahn and the Rise of Nuclear Physics written by W.R. Shea and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: and less as the emanation unden\'ent radioactive decay, and it became motion less after about 30 seconds. Since this process was occurring very rapidly, Hahn and Sackur marked the position of the pointer on a scale with pencil marks. As a timing device they used a metronome that beat out intervals of approximately 1. 3 seconds. This simple method enabled them to determine that the half-life of the emanations of actinium and emanium were the same. Although Giesel's measurements had been more precise than Debierne's, the name of actinium was retained since Debierne had made the discovery first. Hahn now returned to his sample of barium chloride. He soon conjectured that the radium-enriched preparations must harbor another radioactive sub stance. The liquids resulting from fractional crystallization, which were sup posed to contain radium only, produced two kinds of emanation. One was the long-lived emanation of radium, the other had a short life similar to the emanation produced by thorium. Hahn tried to separate this substance by adding some iron to the solutions that should have been free of radium, but to no avail. Later the reason for his failure became apparent. The element that emitted the thorium emanation was constantly replenished by the ele ment believed to be radium. Hahn succeeded in enriching a preparation until it was more than 100,000 times as intensive in its radiation as the same quantity of thorium.

Download or read book The Birth of Particle Physics written by Laurie M. Brown and published by CUP Archive. This book was released on 1986-10-31 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: A distinctive collection of essays, discussions, and personal descriptions of the evolution of particle physics.

Download or read book Globalizing Physics written by Roberto Lalli and published by Oxford University Press. This book was released on 2024-07-09 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an open access book available under the terms of a CC BY-NC-ND 4.0 International licence. It is free to read on the Oxford Academic platform and offered as a free PDF download from OUP and selected open access locations. Following the centenary of the International Union of Pure and Applied Physics, this volume features contributions from leading science historians from around the world on the changing roles of the institution in international affairs from its foundation in 1922 to the present. The case studies presented in this volume show the multitude of functions that IUPAP had and how these were related to the changing international political contexts. The book is divided into three parts. The first discusses the interwar period demonstrating how the exclusion of communities of the Central Powers from international scientific institutions imposed by victorious allied countries made IUPAP ineffective until the end of World War II. The second part analyzes the changing roles assumed by IUPAP starting from its complete renovation after World War II. Case studies covering the role of IUPAP in physics education, in metrology, in joint commissions with other unions and in defining the complex relations between pure and applied physics provide examples of IUPAP's impact on the world of science. Part III squarely addresses the science diplomacy aspects of IUPAP during the Cold War highlighting the importance of IUPAP in furthering diplomatic goals and explaining the origin of the pursuit of the free circulation of scientists as the activity that characterized the main function of international unions during the Cold War. Highlighting how often scientific agendas and political imperatives were entangled in the activities of IUPAP, the book analyzes the work of the Union as exercises of science diplomacy, thus contributing to the current debate on the use of science and technology in international relations.

Download or read book 20th Century Physics written by Edoardo Amaldi and published by World Scientific. This book was released on 1998 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this important volume, major events and personalities of 20th century physics are portrayed through recollections and historiographical works of one of the most prominent figures of European science. A former student of Enrico Fermi, and a leading personality of physical research and science policy in postwar Italy, Edoardo Amaldi devoted part of his career to documenting, both as witness and as historian, some significant moments of 20th century science. The focus of the book is on the European scene, ranging from nuclear research in Rome in the 1930s to particle physics at CERN, and includes biographies of physicists such as Ettore Majorana, Bruno Touschek and Fritz Houtermans.Edoardo Amaldi (Carpaneto, 1908 - Roma, 1989) was one of the leading figures in twentieth century Italian science. He was conferred his degree in physics at Rome University in 1929 and played an active role (as a member of the team of young physicists known as ?the boys of via Panisperna?) in the fundamental research on artificial induced radioactivity and the properties of neutrons, which won the group's leader Enrico Fermi the Nobel Prize for physics in 1938. Following Fermi's departure for the United States in 1938 and the disruption of the original group, Amaldi took upon himself the task of reorganising the research in physics in the difficult situation of post-war Italy. His own research went from nuclear physics to cosmic ray physics, elementary particles and, in later years, gravitational waves. Active research was for him always coupled to a direct involvement as a statesman of science and an organiser: he was the leading figure in the establishment of INFN (National Institute for Nuclear Physics) and has played a major role, as spokesman of the Italian scientific community, in the creation of CERN, the large European laboratory for high energy physics. He also actively supported the formation of a similar trans-national joint venture in space science, which gave birth to the European Space Agency. In these and several other scientific organisations, he was often entrusted with directive responsibilities. In his later years, he developed a keen interest in the history of his discipline. This gave rise to a rich production of historiographic material, of which a significant sample is collected in this volume.

Download or read book Golden Age Of Theoretical Physics The Boxed Set Of 2 Vols written by Jagdish Mehra and published by World Scientific. This book was released on 2001-02-28 with total page 1436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Golden Age of Theoretical Physics brings together 37 selected essays. Many of these essays were first presented as lectures at various universities in Europe and the USA, and then published as reports or articles. Their enlarged, final versions were published in the joint work of Jagdish Mehra and Helmut Rechenberg, The Historical Development of Quantum Theory, while the other essays were published as articles in scientific journals or in edited books. Here they are published together as a tribute to the Mehra-Rechenberg collaboration sustained for several decades, and cover various aspects of quantum theory, the special and general theories of relativity, the foundations of statistical mechanics, and some of their fundamental applications. Two essays, ‘Albert Einstein's “First” Paper’ (Essay 1) and ‘The Dream of Leonardo da Vinci’ (Essay 37), lie outside the major themes treated in this book, but are included here because of their historical interest. The origin of each essay is explained in a footnote.This book deals with the most important themes developed in the first 40 years of the twentieth century by some of the greatest pioneers and architects of modern physics. It is a vital source of information about what can veritably be described as ‘the golden age of theoretical physics’.

Download or read book Great Solid State Physicists of the 20th Century written by Julio Antonio Gonzalo and published by World Scientific. This book was released on 2003 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 20th Century has been called the Century of Physics. It could be even more appropriate to call it the Century of Solid State Physics. All the technological developments which had changed the world by the end of the century had been based upon previous scientific developments in Solid State Physics. The Braggs, Debye, Bardeen, Landau were certainly at the forefront of all those revolutionary changes. Readership: Final-year undergraduates, graduate students, teachers, researchers working in materials physics, condensed matter/solid-state physics.

Download or read book The Conceptual Completion and Extensions of Quantum Mechanics 1932 1941 Epilogue Aspects of the Further Development of Quantum Theory 1942 1999 written by Jagdish Mehra and published by Springer Science & Business Media. This book was released on 2000 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index catalogue of the Library of the Surgeon General s Office United States Army Army Medical Library written by Army Medical Library (U.S.) and published by . This book was released on 1938 with total page 1366 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Collection of incunabula and early medical prints in the library of the Surgeon-general's office, U.S. Army": Ser. 3, v. 10, p. 1415-1436.

Download or read book Index catalogue of the Library of the Surgeon General s Office United States Army written by National Library of Medicine (U.S.) and published by . This book was released on 1938 with total page 1368 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neutron Physics For Nuclear Reactors Unpublished Writings By Enrico Fermi written by Salvatore Esposito and published by World Scientific. This book was released on 2010-06-04 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique volume gives an accurate and very detailed description of the functioning and operation of basic nuclear reactors, as emerging from yet unpublished papers by Nobel Laureate Enrico Fermi.In the first part, the entire course of lectures on Neutron Physics delivered by Fermi at Los Alamos is reported, according to the version made by Anthony P French. Here, the fundamental physical phenomena are described very clearly and comprehensively, giving the appropriate physics grounds for the functioning of nuclear piles. In the second part, all the patents issued by Fermi (and coworkers) on the functioning, construction and operation of several different kinds of nuclear reactors are reported. Here, the main engineering problems are encountered and solved by employing simple and practical methods, which are described in detail.This seminal work mainly caters to students, teachers and researchers working in nuclear physics and engineering, but it is of invaluable interest to historians of physics too, since the material presented here is entirely novel.

Download or read book Lise Meitner and the Dawn of the Nuclear Age written by Patricia Rife and published by Plunkett Lake Press. This book was released on 2019-08-09 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: This biography of Lise Meitner (1878-1968), the Austrian Jewish female physicist at the heart of the discovery of nuclear fission, also looks at major developments in physics during her life. Meitner was a colleague and friend of many giants of 20th century physics: Max Planck, her Berlin mentor, Einstein, von Laue, Marie Curie, Chadwick, Pauli and Bohr. She was the first woman to earn a Ph.D. in physics at the University of Vienna, a pioneer in the research of radioactive processes and, together with her nephew Otto Robert Frisch, an interpreter of the process of nuclear fission in 1938. Yet at the end of World War II, her colleague of thirty years, radiochemist Otto Hahn alone was awarded the 1944 Nobel Prize in Chemistry for the “discovery” of nuclear fission — a discovery based on years of research in which Meitner was directly involved before her secret 1938 escape from Nazi Germany to Sweden. “A story of one of the half dozen most remarkable women of the 20th century.” — John Archibald Wheeler, Princeton University “Patricia Rife’s biography truly brings Meitner to life, both as a scientist and as a woman... Rife weaves Meitner’s personal struggles into the social and political fabric of her times. For example, the story of Meitner’s early career is told against the backdrop of the development of the new physics, with plentiful illumination of the limited prospects for women scientists in the German-speaking world during the early twentieth century. When Meitner's story enters the Nazi era — including her escape from Germany — it is as riveting as the best novel.” — Catherine Westfall,Technology and Culture “A well-written, thorough, readable and engrossing work.” — Gary Goldstein, Peace and Change: a Journal of Peace Research “Rife has produced an exciting book, which reads like a novel and she gives justice to Meitner’s life full of science and human stories... [The] book is a beautiful tribute to an outstanding scientist; it has a lot to teach us about our world; and it is a great read. I warmly recommend it to everyone interested in science and in history.” — Structural Chemistry “Lise Meitner comes to life as author Rife skillfully weaves social, political, and scientific events into a well-researched and documented work. Lists of Meitner’s awards and publications and an extensive bibliography complete this excellent book.” — Association of Women in Science Magazine “The dramatic tale of the discovery of nuclear fission on the eve of WWII... not just a story of ideas... but also of the social and intellectual milieu in which these ideas were developed. It is also the story of how a shy, self-effacing young woman, through talent and hard work, became a world-class scientist... Rife tells this story very well.” — The Antioch Review “The particular merit of Rife’s biography of Austrian physicist Meitner is that it places her life and work within the historical context... It is comprehensive, generally clearly written... and appropriate for undergraduate students. Just enough science is included as to make clear the significance of her work... Extensive bibliography, informative footnotes.” — Choice

Download or read book The Origin of the Concept of Nuclear Forces written by L.M Brown and published by CRC Press. This book was released on 1996-01-01 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt: The concept of fundamental nuclear forces emerged gradually during the start of the 1930s and reached our present level of description some time before the 1950s. The Origin of the Concept of Nuclear Forces presents a unified, comprehensive account of the history of this important part of the modern scientific worldview. In addition, the authors, foremost experts in the field, examine the sociological and philosophical aspects of the story in light of the various theories of scientific development. The book contains analyses of published work, archival materials, and original interviews. It will be appealing primarily to historians of science and physicists interested in the roots of their field.

Download or read book Controversy and Consensus Nuclear Beta Decay 1911 1934 written by Carsten Jensen and published by Springer. This book was released on 2012-12-06 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1920s, a long-lasting controversy on the interpretation of nuclear beta spectrum arose between Lise Meitner and Charles Drummond Ellis. This controversy, and the reactions from the contending parties when it was settled, reflect clearly the difference between the scientific communities in Berlin and Cambridge at that time. The Meitner-Ellis controversy ended in 1929, and it left an anomaly that attracted leading theoretical physicists. A new dispute, this time between Niels Bohr and Wolfgang Pauli, broke out. It concerned the explanation of the continuity of the primary beta particles and dominated the discussions for the next five years. Pauli argued for a new particle, and Bohr for a new theory; both suggestions were radical steps, but they reflected two different ways of doing physics.

Download or read book The National Union Catalog Pre 1956 Imprints written by and published by . This book was released on 1974 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Making 20th Century Science written by Stephen G. Brush and published by Oxford University Press. This book was released on 2015-04-13 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historically, the scientific method has been said to require proposing a theory, making a prediction of something not already known, testing the prediction, and giving up the theory (or substantially changing it) if it fails the test. A theory that leads to several successful predictions is more likely to be accepted than one that only explains what is already known but not understood. This process is widely treated as the conventional method of achieving scientific progress, and was used throughout the twentieth century as the standard route to discovery and experimentation. But does science really work this way? In Making 20th Century Science, Stephen G. Brush discusses this question, as it relates to the development of science throughout the last century. Answering this question requires both a philosophically and historically scientific approach, and Brush blends the two in order to take a close look at how scientific methodology has developed. Several cases from the history of modern physical and biological science are examined, including Mendeleev's Periodic Law, Kekule's structure for benzene, the light-quantum hypothesis, quantum mechanics, chromosome theory, and natural selection. In general it is found that theories are accepted for a combination of successful predictions and better explanations of old facts. Making 20th Century Science is a large-scale historical look at the implementation of the scientific method, and how scientific theories come to be accepted.

Download or read book Restructuring Of Physical Sciences In Europe And The United States 1945 1960 The Proceedings Of The International Conference written by Michelangelo De Maria and published by World Scientific. This book was released on 1989-06-01 with total page 829 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book How Experiments End written by Peter Galison and published by University of Chicago Press. This book was released on 1987-10-15 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface 1. Introduction 1.1. Strategies of Demonstration 1.2. Errors and Endings 1.3. Presuppositions and the Scope of Experimental Autonomy 1.4. Overview 2. From Aggregates to Atoms 2.1. History versus Statistics 2.2. The Apparatus of Averages 2.3. Molecular Magnets 2.4. The Electron 2.5. Einstein's Experiment 2.6. Einstein's Presuppositions 2.7. The Forgotten Influence of Terrestrial Magnetism 2.8. Expectations Defied 2.9. Ducks, Rabbits, and Errors 2.10. The Scylla and Charybdis of Ending an Experiment 3. Particles and Theories 3.1. Particles One by One 3.2. Millikan's Cosmic Rays 3.3. Beliefs behind the "Birth Cry of Atoms" 3.4. Contesting Instruments and Theories 3.5. Testing Quantum Mechanics 3.6. Quantum Theory Fails 3.7. A New Kind of Radiation 3.8. Regrouping the Phenomena 3.9. Two Cases for a New Particle 3.10. Corroboration by Theory, Corroboration by Experiment 3.11. Persuasive Evidence and the End of Experiments 4. Ending a High-Energy Physics Experiment 4.1. The Scale of High-Energy Physics 4.2. The Collective Wisdom: No Neutral Currents 4.3. Symmetries and Infinities 4.4. Priorities 4.5. Good Reasons for Disbelief 4.6. The Role of Theorists 4.7. Background and Signal 4.8. Do Neutral Currents "Really Exist"? 4.9. A Picture Book Event 4.10. The Expanding Circle of Belief 4.11. Models, Background, and Commitment 4.12. Experiment 1A: Parts and Participants 4.13. Short Circuits and High Theory 4.14. First Data 4.15. "Shadow of a Suspicion" 4.16. Dismantling an Ending 4.17. "I Don't See How to Make These Effects Go Away" 5. Theoretical and Experimental Cultures 5.1. Levels of Theoretical Commitment 5.2. Long-Term Constraints 5.3. Middle-Term Constraints 5.4. Short-Term Constraints 5.5. Carving Away the Background 5.6. Directness, Stability, and the Stubbornness of Phenomena 6. Scale, Complexity, and the End of Experiments 6.1. The Assembly of Arguments 6.2. Collaborations and Communities 6.3. Subgroups, Arguments, and History 6.4. The End Appendix: Authors of Papers on Neutral Currents Abbreviations for Archival Sources Bibliography Index.