PDF of Fission Teachers Guide
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Prehistory of CERN: the First Suggestions (1949-Jun 1950)
CHS-3 March 1984 STUDIES IN CERN HISTORY Prehistory of CERN : the first suggestions (1949 - June 1950) Dominique Pestre GENEVA 1984 The Study of CERN History is a project financed by Institutions in several CERN Member Countries. This report presents preliminary findings. and is intended for incorporation into a more comprehensive study of CERN's history. It is distributed primarily to historians and scientists to provoke discussion, and no part of it should be cited or reproduced without written permission from the Team Leacier. Comments are welcome and should be sent to: Study Team for CERN History c/oCERN CH-1211 GENEVE23 Switzerland © Copyright Study Team for CERN History, Geneva 1984 CERN-Service d'information scientifique - 300 - mars 1984 PREHISTORY OF CERN THE FIRST SUGGESTIONS (1949 - June 1950) I The years following the war II Two proposals of European collaboration in November 1949 III The European Cultural Conference, Lausanne, December 8-12, 1949 IV Attempts to implement the suggestions a - The European Movement initiative b - The French attempts V The fifth General Conference of UNESCO, Florence, June 1950 PREHISTORY OF CERN: THE FIRST SUGGESTIONS (1949-June 1950) 1 The official date of the foundation of CERN is easily established. The convention setting up CERN, signed on July 1, 1953 was ratified by France and Germany on September 29, 1954. By then nine States had signed, and CERN came officially into being. However, the interest of this date is rather limited. It ended a process initiated several years before and understanding this process is far more interesting than having a date of birth. -
The Transuranium Elements: from Neptunium and Plutonium to Element 112
UCRL-JC- 124728 The Transuranium Elements: From Neptunium and Plutonium to Element 112 Professor Darleane C. Hoffman Lawrence Livermore National Laboratory G. Seaborg Institute for Transactinium Science RECEIVED T. Isotope Sciences Division sEp23 ?9g6 This paper was prepared for submittal to the Conference Proceedings NATO Advanced Study Institute on "Actinides and the Environment" Chania, Crete, Greece July 7-19, 1996 July 26, 1996 DISCWMER This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best avaiiable original document. c THE TRANSURANIUM ELEMENTS: FROM NEPTUNIUM AM) PLUTONIUM TO ELEMENT112 DarIeane C. Hoffman Nuclear Science Division & Chemistry Department, University of California, Berkeley, CA 94720 & G. T. Seaborg Institute for ' Transactinium Science, MS-L23 1, LLNL, Livermore, CA 94550. -
Fleming Vs. Florey: It All Comes Down to the Mold Kristin Hess La Salle University
The Histories Volume 2 | Issue 1 Article 3 Fleming vs. Florey: It All Comes Down to the Mold Kristin Hess La Salle University Follow this and additional works at: https://digitalcommons.lasalle.edu/the_histories Part of the History Commons Recommended Citation Hess, Kristin () "Fleming vs. Florey: It All Comes Down to the Mold," The Histories: Vol. 2 : Iss. 1 , Article 3. Available at: https://digitalcommons.lasalle.edu/the_histories/vol2/iss1/3 This Paper is brought to you for free and open access by the Scholarship at La Salle University Digital Commons. It has been accepted for inclusion in The iH stories by an authorized editor of La Salle University Digital Commons. For more information, please contact [email protected]. The Histories, Vol 2, No. 1 Page 3 Fleming vs. Florey: It All Comes Down to the Mold Kristen Hess Without penicillin, the world as it is known today would not exist. Simple infections, earaches, menial operations, and diseases, like syphilis and pneumonia, would possibly all end fatally, shortening the life expectancy of the population, affecting everything from family-size and marriage to retirement plans and insurance policies. So how did this “wonder drug” come into existence and who is behind the development of penicillin? The majority of the population has heard the “Eureka!” story of Alexander Fleming and his famous petri dish with the unusual mold growth, Penicillium notatum. Very few realize that there are not only different variations of the Fleming discovery but that there are also other people who were vitally important to the development of penicillin as an effective drug. -
Cave Archaeology and the NSS: 1941–2006
George Crothers, P. Willey, and Patty Jo Watson – Cave archaeology and the NSS: 1941–2006. Journal of Cave and Karst Studies, v. 69, no. 1, p. 27–34. CAVE ARCHAEOLOGY AND THE NSS: 1941–2006 GEORGE CROTHERS1,P.WILLEY2, AND PATTY JO WATSON3 Abstract: Like most other branches of speleology, cave archaeology in the U.S. grew and developed significantly during the mid to late twentieth century. Originally viewed as marginal to mainstream Americanist archaeology, pursuit of prehistoric and historic archaeology underground is now widely accepted as making valuable contributions to knowledge of human past. The National Speleological Society played a central role in that development and continues to do so. We outline the establishment and growth of cave archaeology in North America, with special emphasis on relations between the NSS and archaeology performed in dark zone, deep cave interiors. INTRODUCTION 1920s and 1930s by ‘‘the Caveman,’’ as Neville was often called. The NSS has directly participated in cave archaeology Despite interest in cave archaeology within the NSS through cooperation, education, and conservation. Mem- governance and some portion of the membership during bers of the Society have made notable contributions to the the first few decades after the organization was formed, science by reporting the location of archaeological sites, systematic, long-term archaeological research by pro- participating in their investigation, and by equipping fessional archaeologists in the dark zones of big caves in scientists with the techniques and technology needed to the Americas did not get underway until the 1960s. There work safely in the cave environment (Damon, 1991, p. -
HEAVY WATER and NONPROLIFERATION Topical Report
HEAVY WATER AND NONPROLIFERATION Topical Report by MARVIN M. MILLER MIT Energy Laboratory Report No. MIT-EL 80-009 May 1980 COO-4571-6 MIT-EL 80-009 HEAVY WATER AND NONPROLIFERATION Topical Report Marvin M. Miller Energy Laboratory and Department of Nuclear Engineering Massachusetts Institute of Technology Cambridge, Massachusetts 02139 May 1980 Prepared For THE U.S. DEPARTMENT OF ENERGY UNDER CONTRACT NO. EN-77-S-02-4571.A000 NOTICE This report was prepared as an account of work sponsored by the United States Government. Neither the United States nor the United States Department of Energy, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or useful- ness of any information, apparatus, product or process disclosed or represents that its use would not infringe privately owned rights. A B S T R A C T The following report is a study of various aspects of the relationship between heavy water and the development of the civilian and military uses of atomic energy. It begins with a historical sketch which traces the heavy water storyfrom its discovery by Harold Urey in 1932 through its coming of age from scientific curiosity to strategic nuclear material at the eve of World War II and finally into the post-war period, where the military and civilian strands have some- times seemed inextricably entangled. The report next assesses the nonproliferation implications of the use of heavy water- moderated power reactors; several different reactor types are discussed, but the focus in on the natural uranium, on- power fueled, pressure tube reactor developed in Canada, the CANDU. -
Isotopic Analyses of Barium in Meteorites and in Terrestrial
•'OO•,NALO• GEO•'IIYSlCALRESXAaCX VOL. ?4, NO. IS, JULY IS, 1969 Isotopic Analysesof Barium in Meteorites and in Terrestrial Samples O. EUGSTER,F. TERA,AND G. J. WASSERBURG Charles Arms Laboratory o• the Division o• Geological Sciences Cali•Jrnia Institute o• Technology,Pasadena, California 91109 Isotopic compos•tien and concentration of barium in six stone meteorites and the silicate inclusionsof two iron meteorites and three terrestrial sampleswere measured by use of a 'double spike' isotopic dilution technique in order to correct for laboratory fractionation. Any differencesbetween the abundancesof the isotopesin meteoritic and terrestrial Ba were found to be less than 0.1% for all isotopes.The per cent abundancesof Ba found in our work for Ba '•s, Ba•, Ba•% Ba '•, Ba TM,Ba •', and Ba'•ø are 71.699, 11.232, 7.853, 6.592, 2.417, 0.1012, and 0.1058, respectively. Because of the higher precision, these abundancesshould replace the currently accepted values. These results show the variations in the Ba isotopesreported by S. Umemoto (1962) to be unsubstantiated. INTRODUCTION Umemoto [1962] reported that the isotopic A comparison.of the isotopiccomposition of compositionof Ba in the Bruderheimchondrite and in the Pasamonte and Nuevo Laredo various elements in terrestrial samples,me- achondrites were distinct from terrestrial Ba teorites, and other materials of the solar system is of fundamental importance in determin- and showeda pattern of uniform fractionation relative to terrestrial Ba. The enrichments ob- ing the early history of the solar system and the mechanismsof nucleosynthesis.In ad- servedby him correspondto a 2% enrichment dition to effectsthat are a product of either in the ratio Ba•ø/Ba• compared with ter- long-lived natural activity or cosmic-rayinter- restrial materials. -
6. Potential for Human Exposure
CESIUM 125 6. POTENTIAL FOR HUMAN EXPOSURE 6.1 OVERVIEW Cesium has been identified in at least 8 of the 1,636 hazardous waste sites that have been proposed for inclusion on the EPA National Priorities List (NPL) (HazDat 2003). It was reported that 134Cs has been found in at least 3 of the 1,636 current or former NPL sites and 137Cs has been detected in at least 23 of the 1,636 current or former NPL sites. However, the number of sites evaluated for cesium is not known. The frequency of these sites can be seen in Figures 6-1, 6-2, and 6-3. Of these sites, none are located in the Commonwealth of Puerto Rico. Naturally-occurring cesium and cesium minerals consist of only one stable isotope, 133Cs. Cesium occurs in the earth's crust at low concentrations. Granites contain an average cesium concentration of about 1 ppm and sedimentary rocks contain about 4 ppm (Burt 1993). Higher concentrations are found in lepidolite, carnallite, muscovite, beryl, spodumene, potassium feldspars, leucite, petalite, and related minerals. The most important source of commercial cesium is the mineral pollucite, which usually contains about 5–32% Cs2O (Burt 1993). The largest deposits of pollucite are located in Manitoba, Canada and account for about two-thirds of the world’s known supply. Smaller deposits are located in Zimbabwe, Namibia, Brazil, Scandinavia, Czechoslovakia, and the United States. Continental dust and soil erosion are the main emission sources of naturally occurring cesium present in the environment. Cesium is also released to the environment as a result of human activities. -
Lew Kowarski
Lew Kowarski 1907-1979 Avant-propos ~~~'\ John B. Adams Les textes publies dans le present document sont ceux directeur de son Departement des sciences naturelles. des allocutions prononcees !ors d'une reunion a la me Denis de Rougemont, comme Lew Kowarski, a done pris moire de Lew Kowarski, qui s'est tenue au CERN a une grande part a la creation du CERN et s'est trouve en Geneve le 20 decembre 1979. contact avec Kowarski, tant a ce moment-la que pendant Ces allocutions couvrent les differentes phases de la vie Jes annees ou ce dernier a travaille au CERN. Leurs rela et de !'oeuvre de Lew Kowarski, et chaque orateur s'est tions se resserrerent encore apres que Kowarski eut pris sa trouve en association etroite avec lui a differentes epoques retraite. de sa carriere. Jean Mussard a egalement concouru a la creation du Jules Gueron a rencontre Kowarski avant la seconde CERN car, a l'epoque ou !'UNESCO entreprenait d'ela guerre mondiale alors qu'il travaillait au laboratoire de borer le projet d'un Laboratoire europeen de physique Joliot a Paris. Ensemble, ils entrerent a «Tube Alloys», nucleaire, ii etait directeur adjoint de la Division pour la nom de code pour le projet d'energie nucleaire en Angle cooperation scientifique internationale a l'UNESCO et terre, et se rendirent au Canada quand ce projet y fut Pierre Auger le chargea de cette elaboration. C'est ainsi transfere en 1943. Apres la guerre, tous deux devinrent qu'il entra en contact avec Lew Kowarski et ii resta en directeurs au CEA, en France, puis leurs itineraires se rapport etroit avec lui jusqu'au deces de celui-ci. -
The New Nuclear Forensics: Analysis of Nuclear Material for Security
THE NEW NUCLEAR FORENSICS Analysis of Nuclear Materials for Security Purposes edited by vitaly fedchenko The New Nuclear Forensics Analysis of Nuclear Materials for Security Purposes STOCKHOLM INTERNATIONAL PEACE RESEARCH INSTITUTE SIPRI is an independent international institute dedicated to research into conflict, armaments, arms control and disarmament. Established in 1966, SIPRI provides data, analysis and recommendations, based on open sources, to policymakers, researchers, media and the interested public. The Governing Board is not responsible for the views expressed in the publications of the Institute. GOVERNING BOARD Sven-Olof Petersson, Chairman (Sweden) Dr Dewi Fortuna Anwar (Indonesia) Dr Vladimir Baranovsky (Russia) Ambassador Lakhdar Brahimi (Algeria) Jayantha Dhanapala (Sri Lanka) Ambassador Wolfgang Ischinger (Germany) Professor Mary Kaldor (United Kingdom) The Director DIRECTOR Dr Ian Anthony (United Kingdom) Signalistgatan 9 SE-169 70 Solna, Sweden Telephone: +46 8 655 97 00 Fax: +46 8 655 97 33 Email: [email protected] Internet: www.sipri.org The New Nuclear Forensics Analysis of Nuclear Materials for Security Purposes EDITED BY VITALY FEDCHENKO OXFORD UNIVERSITY PRESS 2015 1 Great Clarendon Street, Oxford OX2 6DP, United Kingdom Oxford University Press is a department of the University of Oxford. It furthers the University’s objective of excellence in research, scholarship, and education by publishing worldwide. Oxford is a registered trade mark of Oxford University Press in the UK and in certain other countries © SIPRI 2015 The moral rights of the authors have been asserted All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, without the prior permission in writing of SIPRI, or as expressly permitted by law, or under terms agreed with the appropriate reprographics rights organizations. -
Lise Meitner 1878 – 1968
Discoveries that changed the world: 1932 – 1942 James Chadwick 1891 – 1974 Lise Meitner 1878 – 1968 I „The road to the neutron“ Staff and research students at the Cavendish Laboratory, Cambridge, 1923. (Names from left to right. Front row: J. Chadwick, G. Stead, F.W. Aston, Prof. Sir J. J. Thomson, Prof. Sir E. Rutherford, J.A. Crowther, Miss B. Trevelyan, G.I. Taylor, Second row: P. Kapitza, H. de W. Smyth, T. Alty, J.E. Crackston, H. Robinson, L.F. Curtiss, E.S. Bieler, A.G.D. West, P. Mercier. Back row: P.M.S. Blackett, R.E. Clay, H.W.B. Skinner, H.D. Griffith, A.W. Barton, L.F. Bates, J.S. Rogers, K.G. Emeleus.) The room which Rutherford and Chadwick used for their scattering experiments in the 1920s. The work was carried out in the dark, often to the accompaniment of Rutherford singing „Onward Christian Soldiers“. Rutherford had already proposed the neutron in 1920 in his Bakerian Lecture at the Royal Society. He talked about a “neutral doublet” (at that time considered a proton and electron) that could be difficult to detect and move easily through matter. Curie & Joliot published (incorrectly) in Jan. 1932 the observation: 9Be + 4He → 12C + 1n I. Curie and F. Joliot, C. R. Acad. Sci. Paris 194, 273 (1932) When the radiation was passed through wax the ionisation increased! This increase was due to knock-on protons. To explain this the Curie’s suggested that the emission was of a 55 MeV γ ray, an energy much greater than anything yet seen! Moreover, the radiation also passed through lead This experiment was first performed in 1930 by Walter Bothe and Herbet Becker at U. -
Frisch-Otto.Pdf
A Selected Bibliography of Publications by, and about, Otto Robert Frisch Nelson H. F. Beebe University of Utah Department of Mathematics, 110 LCB 155 S 1400 E RM 233 Salt Lake City, UT 84112-0090 USA Tel: +1 801 581 5254 FAX: +1 801 581 4148 E-mail: [email protected], [email protected], [email protected] (Internet) WWW URL: http://www.math.utah.edu/~beebe/ 18 April 2019 Version 1.07 Title word cross-reference 3 3 $29.95 [Sta08]. 2 P0;1;2 [FP31]. 2 S1 [FP31]. $30 [Sta08]. $32 [Sta08]. $7.50 [Lin60]. 235 [SFFdH45]. α [Fri42b]. -ray [Fri42b]. 1 [FP64, SBRT+16a]. 114 [Fri61d]. 11th [AP77]. 12th [AP77]. 1904-1979 [ALJ82]. 1930s [Hen80, Stu79]. 1939 [MF69]. 1954 [Rot54]. 1960s [Mla98]. 1963 [Gar63a]. 1963-A [Gar63a]. 1968 [Fri70b]. 1979 [Fel79, Pei81]. 1995 [Lee07]. 1999 [Rot00]. 2 [SBRT+16b]. 2002 [Bar05]. 2010 [KLR13]. 20th [FPLR59a, Fri73b, Rei07]. 272 [Fri73a]. 285 [Lip59]. 3 [For17, SBRT+16c]. 310 [But64]. 368 [Fri73b]. 1 2 4 [SBRT+16d]. 448pp [For17]. 737 [Fri74a]. 80th [FPLR59b, Lin60]. 8th [Rot00]. 93 [Nod34]. 978-0-19-874430-6 [For17]. A.E.R.E. [Fri47a]. Ablenkung [FS33e]. Abraham [Smo07]. Absolute [Fri42a]. Absorption [FHM36, FP43]. Academy [Bar05]. Acceleration [Fri51a, Fri51c, Fri50a]. accelerators [Fri53b, Fri55f]. act [Stu13]. acting [FvK37b]. adventures [FL06]. af [BR64, RRK+64]. after [Coc46, Kae48, SFFdH45]. Age [Stu18, Fri59l, Fri79b, Rif06]. ago [Sim14]. Alamos [SR92, Sza92a, Sza92b]. Albert [Smo07, Fri79c, Fri73a]. alkaline [HS39]. Allen [Fri55d]. always [Seg93]. America [Stu85]. Amherst [Bar05]. amplifiers [FF46]. Amrine [Fri60b]. analyser [FFS51, FO60]. Analysis [KED+60, Fri42b]. Analysis/Mehlin [KED+60]. -
Atoms Worksheet #2 (The Mole)
Name_______________________________ Atoms Worksheet #2 (The Mole) 1. Counting Atoms – How many atoms are in the following compounds? a) CaCl2___3____ b) NH4OH___7____ c) NaCl____2___ d) N2O7__9_____ e) P2O5__7_____ f) KNO3___5____ g) Al2(CO3)3__14_____ h) Na3PO4__8___ i) Mg(NO3)2__9_____ 2. Calculate the molar mass of the following compounds: a) NaCl 58.5 g/mol b) Fe2O3 159.6 g/mol c) LiOH 23.9 g/mol d) NH3 17.0 g/mol e) AlPO4 122.3 g/mol 3. Mole-to-Gram/Gram-to-Mole Conversions (One Step Problems) a) How many grams of Ca are present in 3.28 moles? 132 g Ca b) How many grams of S are present in 5.39 moles? 173 g S c) How many moles of Ag are there in 4.98 gram? 0.0462 mol d) How many moles of Mg are present in 303 grams? 12.5 mol Mg 4. Conversions using Avogadro’s number (One Step Problems) a) How many atoms are present in 34.69 moles of Mg? 2.09 X 1025 atoms b) How many atoms are present in 0.529 moles of Li? 3.18 X 1023 atoms c) How many moles of Mn are present in 4.09 x 1024 atoms of Mn? 6.79 mol d) How many moles of Ni are present in 5.88 x 1019 atoms? 0.0000977 mol 5. Grams ↔ Moles ↔ Particles OR Atoms OR Molecules (Two Step Problems) a) Calculate the number of molecules in 8.33 grams of O2 1.57 X 1023 molecules b.) Calculate the number of atoms in 43.33 grams of iron, Fe? 4.67 X 1023 atoms c) Calculate the number of particles in 32.8 grams of Cu2S.