Thomas Lauritsen Papers, Date (Inclusive): 1922-1974 Collection Number: Consult Repository Creator: Lauritsen, Thomas, 1915-1973 Extent: 9.5 Linear Feet
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The Secret History of Australia's Nuclear Ambitions
Jim Walsh SURPRISE DOWN UNDER: THE SECRET HISTORY OF AUSTRALIAS NUCLEAR AMBITIONS by Jim Walsh Jim Walsh is a visiting scholar at the Center for Global Security Research at Lawrence Livermore National Laboratory. He is also a Ph.D. candidate in the Political Science program at MIT, where he is completing a dissertation analyzing comparative nuclear decisionmaking in Australia, the Middle East, and Europe. ustralia is widely considered tactical nuclear weapons. In 1961, of state behavior and the kinds of Ato be a world leader in ef- Australia proposed a secret agree- policies that are most likely to retard forts to halt and reverse the ment for the transfer of British the spread of nuclear weapons? 1 spread of nuclear weapons. The nuclear weapons, and, throughout This article attempts to answer Australian government created the the 1960s, Australia took actions in- some of these questions by examin- Canberra Commission, which called tended to keep its nuclear options ing two phases in Australian nuclear for the progressive abolition of open. It was not until 1973, when history: 1) the attempted procure- nuclear weapons. It led the fight at Australia ratified the NPT, that the ment phase (1956-1963); and 2) the the U.N. General Assembly to save country finally renounced the acqui- indigenous capability phase (1964- the Comprehensive Test Ban Treaty sition of nuclear weapons. 1972). The historical reconstruction (CTBT), and the year before, played Over the course of four decades, of these events is made possible, in a major role in efforts to extend the Australia has gone from a country part, by newly released materials Treaty on the Non-Proliferation of that once sought nuclear weapons to from the Australian National Archive Nuclear Weapons (NPT) indefi- one that now supports their abolition. -
Physics Nobel Prize 1975
Physics Nobel Prize 1975 Nobel prize winners, left to right, A. Bohr, B. Mottelson and J. Rainwater. 0. Kofoed-Hansen (Photos Keystone Press, Photopress) Before 1949 every physicist knew that mooted, it was a major breakthrough from 1943-45. From December 1943 the atomic nucleus does not rotate. in thinking about the nucleus and he was actually in the USA. Back in The reasoning behind this erroneous opened a whole new field of research Denmark after the war, he obtained belief came from the following argu• in nuclear physics. This work has for his Ph. D. in 1954 for work on rota• ments. A quantum-mechanical rotator years been guided by the inspiration tional states in atomic nuclei. His with the moment of inertia J can take of Bohr and Mottelson. thesis was thus based on the work for up various energy levels with rota• An entire industry of nuclear which he has now been recognized at tional energies equal to h2(l + 1)| research thus began with Rainwater's the very highest level. He is Professor /8TC2J, where h is Planck's constant brief contribution to Physical Review at the Niels Bohr Institute of the ^nd I is the spin. As an example, I may in 1950 entitled 'Nuclear energy level University of Copenhagen and a nave values 0, 2, 4, ... etc. If the argument for a spheroidal nuclear member of the CERN Scientific Policy nucleus is considered as a rigid body, model'. Today a fair-sized library is Committee. then the moment of inertia J is very needed in order to contain all the Ben Mottelson was born in the USA large and the rotational energies papers written on deformed nuclei and in 1926 and has, for many years, become correspondingly very small. -
Appendix E Nobel Prizes in Nuclear Science
Nuclear Science—A Guide to the Nuclear Science Wall Chart ©2018 Contemporary Physics Education Project (CPEP) Appendix E Nobel Prizes in Nuclear Science Many Nobel Prizes have been awarded for nuclear research and instrumentation. The field has spun off: particle physics, nuclear astrophysics, nuclear power reactors, nuclear medicine, and nuclear weapons. Understanding how the nucleus works and applying that knowledge to technology has been one of the most significant accomplishments of twentieth century scientific research. Each prize was awarded for physics unless otherwise noted. Name(s) Discovery Year Henri Becquerel, Pierre Discovered spontaneous radioactivity 1903 Curie, and Marie Curie Ernest Rutherford Work on the disintegration of the elements and 1908 chemistry of radioactive elements (chem) Marie Curie Discovery of radium and polonium 1911 (chem) Frederick Soddy Work on chemistry of radioactive substances 1921 including the origin and nature of radioactive (chem) isotopes Francis Aston Discovery of isotopes in many non-radioactive 1922 elements, also enunciated the whole-number rule of (chem) atomic masses Charles Wilson Development of the cloud chamber for detecting 1927 charged particles Harold Urey Discovery of heavy hydrogen (deuterium) 1934 (chem) Frederic Joliot and Synthesis of several new radioactive elements 1935 Irene Joliot-Curie (chem) James Chadwick Discovery of the neutron 1935 Carl David Anderson Discovery of the positron 1936 Enrico Fermi New radioactive elements produced by neutron 1938 irradiation Ernest Lawrence -
Nuclear Fallout and Intelligence As Secrets, Problems, and Limitations on the Arms Race, 1940-1964
© Copyright 2016 Michael R. Lehman NUISANCE TO NEMESIS: NUCLEAR FALLOUT AND INTELLIGENCE AS SECRETS, PROBLEMS, AND LIMITATIONS ON THE ARMS RACE, 1940-1964 BY MICHAEL R. LEHMAN DISSERTATION Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in History in the Graduate College of the University of Illinois at Urbana-Champaign, 2016 Urbana, Illinois Doctoral Committee: Professor Lillian Hoddeson, Chair Professor Kristin Hoganson, Co-Chair Professor Michael Weissman Professor Robert Jacobs, Hiroshima City University Abstract Fallout sampling and other nuclear intelligence techniques were the most important sources of United States strategic intelligence in the early Cold War. Operated as the Atomic Energy Detection System by a covert Air Force unit known as AFOAT-1, the AEDS detected emissions and analyzed fallout from Soviet nuclear tests, as well as provided quantitative intelligence on the size of the Russian nuclear stockpile. Virtually unknown because the only greater Cold War secret than nuclear weapons was intelligence gathered about them, data on the Soviet threat produced by AFOAT-1 was an extraordinary influence on early National Intelligence Estimates, the rapid growth of the Strategic Air Command, and strategic war plans. Official guidance beginning with the first nuclear test in 1945 otherwise suggested fallout was an insignificant effect of nuclear weapons. Following AFOAT-1’s detection of Soviet testing in fall 1949 and against the cautions raised about the problematic nature of higher yield weapons by the General Advisory Committee, the Atomic Energy Commission’s top scientific advisers, President Harry Truman ordered the AEC to quickly build these extraordinarily powerful weapons, testing the first in secrecy in November 1952. -
Heisenberg's Visit to Niels Bohr in 1941 and the Bohr Letters
Klaus Gottstein Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) Föhringer Ring 6 D-80805 Munich, Germany 26 February, 2002 New insights? Heisenberg’s visit to Niels Bohr in 1941 and the Bohr letters1 The documents recently released by the Niels Bohr Archive do not, in an unambiguous way, solve the enigma of what happened during the critical brief discussion between Bohr and Heisenberg in 1941 which so upset Bohr and made Heisenberg so desperate. But they are interesting, they show what Bohr remembered 15 years later. What Heisenberg remembered was already described by him in his memoirs “Der Teil und das Ganze”. The two descriptions are complementary, they are not incompatible. The two famous physicists, as Hans Bethe called it recently, just talked past each other, starting from different assumptions. They did not finish their conversation. Bohr broke it off before Heisenberg had a chance to complete his intended mission. Heisenberg and Bohr had not seen each other since the beginning of the war in 1939. In the meantime, Heisenberg and some other German physicists had been drafted by Army Ordnance to explore the feasibility of a nuclear bomb which, after the discovery of fission and of the chain reaction, could not be ruled out. How real was this theoretical possibility? By 1941 Heisenberg, after two years of intense theoretical and experimental investigations by the drafted group known as the “Uranium Club”, had reached the conclusion that the construction of a nuclear bomb would be feasible in principle, but technically and economically very difficult. He knew in principle how it could be done, by Uranium isotope separation or by Plutonium production in reactors, but both ways would take many years and would be beyond the means of Germany in time of war, and probably also beyond the means of Germany’s adversaries. -
Release of Documents Relating to 1941 Bohr-Heisenberg Meeting
Release of documents relating to 1941 Bohr-Heisenberg meeting DOCUMENTS RELEASED 6 FEBRUARY 2002 The family of Niels Bohr has decided to release all documents deposited at the Niels Bohr Archive, either written or dictated by Niels Bohr, pertaining specifically to the meeting between Bohr and Heisenberg in September 1941. There are in all eleven documents. The decision has been made in order to avoid possible misunderstandings regarding the contents of the documents. The documents supplement and confirm previously published statements of Bohr's recollections of the meeting, especially those of his son, Aage Bohr. The documents have now been organised, transcribed and translated into English at the Niels Bohr Archive. Because of the overwhelming interest in the material, it has been decided that the material should be published in full instead of being made available to scholars upon individual application, as is normal practice at the Niels Bohr Archive. This has been done by placing facsimiles, transcriptions and translations on this website here. An illustrated edition of the transcriptions and translations is published in the journal Naturens Verden, Vol. 84, No. 8 - 9. Reprints can be obtained from the Niels Bohr Archive for USD8/EUR8/DKK50 (prepaid). Release of documents relating to 1941 Bohr-Heisenberg meeting. Document 1. Draft of letter from Bohr to Heisenberg, never sent. In the handwriting of Niels Bohr's assistant, Aage Petersen. Undated, but written after the first publication, in 1957, of the Danish translation of Robert Jungk, Heller als Tausend Sonnen, the first edition of Jungk's book to contain Heisenberg's letter. -
Absolute Zero, Absolute Temperature. Absolute Zero Is the Lowest
Contents Radioactivity: The First Puzzles................................................ 1 The “Uranic Rays” of Henri Becquerel .......................................... 1 The Discovery ............................................................... 2 Is It Really Phosphorescence? .............................................. 4 What Is the Nature of the Radiation?....................................... 5 A Limited Impact on Scientists and the Public ............................ 6 Why 1896? .................................................................. 7 Was Radioactivity Discovered by Chance? ................................ 7 Polonium and Radium............................................................. 9 Marya Skłodowska .......................................................... 9 Pierre Curie .................................................................. 10 Polonium and Radium: Pierre and Marie Curie Invent Radiochemistry.. 11 Enigmas...................................................................... 14 Emanation from Thorium ......................................................... 17 Ernest Rutherford ........................................................... 17 Rutherford Studies Radioactivity: ˛-and ˇ-Rays.......................... 18 ˇ-Rays Are Electrons ....................................................... 19 Rutherford in Montreal: The Radiation of Thorium, the Exponential Decrease........................................... 19 “Induced” and “Excited” Radioactivity .................................... 20 Elster -
Aage Bohr Copenhagen, Denmark, 19 June 1922 - 9 Sept
Aage Bohr Copenhagen, Denmark, 19 June 1922 - 9 Sept. 2009 Nomination 17 Apr. 1978 Field Physics Title Professor of Physics at the University of Copenhagen Commemoration – Aage Bohr was born in Copenhagen a few months before his father won the Nobel Prize. His father was Niels Bohr, one of the giants of physics in the early 20th century, who was able to untangle the confusing mysteries of quantum mechanics. Aage Bohr’s childhood was one in which a pantheon of great physicists were friends visiting the family home. The remarkable generation of scientists who came to join his father in his work became uncles for him. These uncles were Henrik Kramers from the Netherlands, Oskar Klein from Sweden, Yoshio Nishina from Japan, Werner Karl Heisenberg from Germany and Wolfgang Pauli from Austria. These are all giants of physics, so Aage Bohr is an example of what science means and what political violence means. In fact, three years after he was born, Hitler ordered the deportation of Danish Jews to concentration camps but the Bohrs, along with most of the other Danish Jews, were able to escape to Sweden. I would like to recall that, despite these great tragedies and political problems, Aage Bohr was able to follow his father’s track, contributing to clarify a very important problem in nuclear physics. He was able, together with Ben Roy Mottelson, to explain why the nuclei were not perfectly spherical. I remind you that the volume of the nucleus is 1 millionth of a billion, 10-15 smaller than the atom, and when Bohr was young the general feeling about nuclear physics was that the nuclei were perfectly symmetric, perfect spheres, platonically perfect spheres, and here comes the contribution of Aage Bohr with Mottelson, because some experiments were showing that this was probably not true. -
Atomic Testing in Australian Art Jd Mittmann
ATO MIC TEST ING IN AUST RAL IAN ART JD MIT TMA NN Around the world artists have be en conce rned wit h Within a radius of 800m the dest ruction is co mplete . and Walle r. He docume nted the Austr alian New Gui nea nuclear iss ues, from the first application of atomic bomb s Over 70,000 die instantl y. campaign and its afte rmath . at Hi roshima and Nagasaki, to at omic testing, uraniu m A person stan ds lost amongst the ruins of a house . In 1946 he was se nt to Japan whe re he witnes sed mining, nuc lear waste tra nspo rt and storage, and We don’t see the chi ld’s exp ression, but it can only be the effects of the ato mic bomb. He doc umented the va st scenarios of nuclear Armageddon. The Australian artisti c one of shock and suffering. A charred tree towers ov er dest ruction from a distant vi ewpoint, spa ring the viewe r response to Bri tish atomic te sting in the 195 0s is les s the rubble. Natu re has withe red in the on slaught of hea t the ho rri fic deta ils. His sketch Rebuilding Hiroshim a well-know n, as is the sto ry of the tests . and shock waves. Simply titled Hi roshima , Albe rt Tucker’ s shows civil ians clearing away the rubble. Li fe ha s Cloaked in se crec y, the British atomic testing progra m small wate rcolour is quiet and conte mplative. -
James Rainwater 1 9 1 7 — 1 9 8 6
NATIONAL ACADEMY OF SCIENCES JAMES RAINWATER 1 9 1 7 — 1 9 8 6 A Biographical Memoir by VAL L. FITCH Any opinions expressed in this memoir are those of the author and do not necessarily reflect the views of the National Academy of Sciences. Biographical Memoir COPYRIGHT 2009 NATIONAL ACADEMY OF SCIENCES WASHINGTON, D.C. Photograph Courtesy AIP Emilio Segré Archives. JAMES RAINWATER December 9, 1917–May 31, 1986 BY VAL L . FITCH . I. RABI, THE COLUMBIA University physics department’s lead- Iing researcher, chairman, and then after his retirement, wise old man, disliked the notion that physicists had divided themselves into two groups: experimental and theoretical. “There is only Physics,” he said, “with a capital P.” His strong feeling always manifested itself in his insistence that those who did experimental theses have a rigorous grounding in theoretical subjects and that theorists know something about experiment. He had two outstanding examples of such people in the department. One was Willis Lamb, who had done his thesis with Robert Oppenheimer and after a series of notable theoretical papers had won the Nobel Prize for an experiment. Rabi never forgave Lamb for leaving Columbia and going back to his native California. And then there was Jim Rainwater, the subject of this memoir, who had done his thesis with John Dunning, a consummate experimental- ist, and had gone on to win the Nobel Prize for theoretical work. Rainwater spent his entire career at Columbia, first as a graduate student and then as a member of the faculty. He enjoyed Rabi’s highest accolades. -
Quantum Information Science
Quantum Information Science Seth Lloyd Professor of Quantum-Mechanical Engineering Director, WM Keck Center for Extreme Quantum Information Theory (xQIT) Massachusetts Institute of Technology Article Outline: Glossary I. Definition of the Subject and Its Importance II. Introduction III. Quantum Mechanics IV. Quantum Computation V. Noise and Errors VI. Quantum Communication VII. Implications and Conclusions 1 Glossary Algorithm: A systematic procedure for solving a problem, frequently implemented as a computer program. Bit: The fundamental unit of information, representing the distinction between two possi- ble states, conventionally called 0 and 1. The word ‘bit’ is also used to refer to a physical system that registers a bit of information. Boolean Algebra: The mathematics of manipulating bits using simple operations such as AND, OR, NOT, and COPY. Communication Channel: A physical system that allows information to be transmitted from one place to another. Computer: A device for processing information. A digital computer uses Boolean algebra (q.v.) to processes information in the form of bits. Cryptography: The science and technique of encoding information in a secret form. The process of encoding is called encryption, and a system for encoding and decoding is called a cipher. A key is a piece of information used for encoding or decoding. Public-key cryptography operates using a public key by which information is encrypted, and a separate private key by which the encrypted message is decoded. Decoherence: A peculiarly quantum form of noise that has no classical analog. Decoherence destroys quantum superpositions and is the most important and ubiquitous form of noise in quantum computers and quantum communication channels. -
Father of the Shell Model
CENTENARY Father of the shell model Heidelberg University held a symposium on fundamental physics and the shell model this summer to celebrate the 100th anniversary of the birth of Hans Jensen, the German who created the nuclear shell model with Maria Goeppert-Mayer of Argonne. Hans Jensen (1907–1973) is the only theorist among the three winners from Heidelberg University of the Nobel Prize for Physics. He shared the award with Maria Goeppert-Mayer in 1963 for the development of the nuclear shell model, which they published independently in 1949. The model offered the first coherent expla- nation for the variety of properties and structures of atomic nuclei. In particular, the “magic numbers” of protons and neutrons, which had been determined experimentally from the stability properties and observed abundances of chemical elements, found a natural explanation in terms of the spin-orbit coupling of the nucleons. These numbers play a decisive role in the synthesis of the ele- ments in stars, as well as in the artificial synthesis of the heaviest elements at the borderline of the periodic table of elements. Hans Jensen was born in Hamburg on 25 June 1907. He studied physics, mathematics, chemistry and philosophy in Hamburg and Freiburg, obtaining his PhD in 1932. After a short period in the Hans Jensen in his study at 16 Philosophenweg, Heidelberg German army’s weather service, he became professor of theo- in 1963. (Courtesy Bettmann/UPI/Corbis.) retical physics in Hannover in 1940. Jensen then accepted a new chair for theoretical physics in Heidelberg in 1949 on the initiative Mayer 1949).