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Table of radioactive elements

Description: As has been the custom in the past, the Commission publishes a table of relative atomic masses and halflives of selected radionuclides. The information contained in this table will enable the user to calculate the atomic weight for radioactive materials with a variety of isotopic compositions. The atomic masses have been taken from the 1984 Atomic Mass Table. Some of the halflives have already been documented.
Date: January 1, 1985
Creator: Holden, Norman E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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New look at the atomic volumes of the. beta. -form of the transplutonium metals

Description: The atomic volumes of the beta-form of the first four transplutonium metals were evaluated using data for samples prepared by thermal and by pressure treatment. The volumes derived for curium, berkelium, and californium metals quenched from elevated temperatures were found to be consistently larger than those for ''pressure-quenched'' samples, whose volumes were in good agreement with values for the alpha-forms. The cubic lattice parameters from ''pressure-quenched'' samples also provided a mor… more
Date: January 1, 1986
Creator: Haire, R.G.; Benedict, U.; Peterson, J.R.; Dufour, C. & Dabos, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The New Element Californium (Atomic Number 98)

Description: Definite identification has been made of an isotope of the element with atomic number 98 through the irradiation of Cm{sup 242} with about 35-Mev helium ions in the Berkeley Crocker Laboratory 60-inch cyclotron. The isotope which has been identified has an observed half-life of about 45 minutes and is thought to have the mass number 244. The observed mode of decay of 98{sup 244} is through the emission of alpha-particles, with energy of about 7.1 Mev, which agrees with predictions. Other consid… more
Date: June 19, 1950
Creator: Thompson, S. G.; Street Jr., K.; Ghiorso, A. & Seaborg, G. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Californium Isotopes From Bombardment of Uranium With Carbonions

Description: The recent production and identification of isotopes of elements with atomic numbers up to six higher than the target element through bombardment with hexapositive 120-Mev carbon ions made it seem worthwhile to apply this technique to the transuranium region. Accordingly, small pieces of natural uranium metal (about 0.5 mil thick and 205 cm by 0.6 cm area) were irradiated in the internal carbon ion beam in the Berkeley 60-inch cyclotron. Following the irradiations, the uranium was dissolved in … more
Date: September 6, 1950
Creator: Ghiorso, A.; Thompson, S. G.; Street, Jr., K. & Seaborg, G. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Personnel neutron dosimetry studies at the Lawrence Livermore National Laboratory

Description: A study was conducted to determine the effect of phantom size, shape and composition on the response of an albedo neutron dosimeter. The most important feature was the shape. The dose equivalent rate from a californium neutron source was determined. Ten different dose rates were determined which varied from 2.39 to 3.02 rem/h for the CF source used. (ACR)
Date: June 9, 1981
Creator: Hankins, D.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Safety Analysis Report for Packaging (SARP) of the Oak Ridge National Laboratory TRU Californium Shipping Container

Description: An analytical evaluation of the Oak Ridge National Laboratory TRU Californium Shipping Container was made in order to demonstrate its compliance with the regulations governing off-site shipment of packages that contain radioactive material. The evaluation encompassed five primary categories: structural integrity, thermal resistance, radiation shielding, nuclear criticality safety, and quality assurance. The results of this evaluation demonstrate that the container complies with the applicable r… more
Date: January 1, 1980
Creator: Box, W. D.; Shappert, L. B.; Seagren, R. D.; Klima, B. B.; Jurgensen, M. C.; Hammond, C. R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Extraction studies of selected actinide ions from aqueous solutions with 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione and tri-n-octylphosphine oxide

Description: The first measurements of distribution coefficients (K{sub d}) for Cm(III), Bk(III), Cf(III), Es(III), and Fm(III) between aqueous perchlorate solutions and solutions of 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (BMPPT) and the synergist tri-n-octylphosphine oxide (TOPO) in toluene are reported. Curium-243, berkelium-250, californium-249, einsteinium-254, and fermium-253 were used in these studies. The K{sub d} for {sup 241}Am was also measured and is in agreement with previou… more
Date: November 1, 1991
Creator: Hannink, N. J.; Hoffman, D. C. (Lawrence Berkeley Lab., CA (United States) California Univ., Berkeley, CA (United States). Dept. of Chemistry) & Smith, B. F. (Los Alamos National Lab., NM (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cleanex process: a versatile solvent extraction process for recovery and purification of lanthanides, americium, and curium

Description: At a concentration of 1 M in straight-chain hydrocarbon diluent, HDEHP will extract americium, curium, and other trivalent actinide and lanthanide elements from dilute acid or salt solutions. The solute is back-extracted with more concentrated acid, either nitric or hydrochloric. The process has been used in the continuous, countercurrent mode, but its greatest advantage arises in batch extractions where the excess acid can be titrated with NaOH to produce a final acidity of about 0.03 M. Under… more
Date: January 1, 1979
Creator: Bigelow, J E; Collins, E D & King, L J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electronic structure and bonding in transuranics: comparison with lanthanides

Description: The physico-chemical properties of the actinide metals, alloys, and compounds show interesting parallels and contrasts with the rare earths, beyond uranium. At first there is a transition region where the unique bonding properties of the early actinides become less prominent, due to progressive f-electron localization. Nevertheless, in contrast to the rare earths, f-electron energies remain close to the Fermi level, resulting in complex behavior as a function of temperature, pressure and struct… more
Date: January 1, 1983
Creator: Ward, J.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Extraction studies of selected actinide ions from aqueous solutions with 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione and tri-n-octylphosphine oxide

Description: The first measurements of distribution coefficients (K{sub d}) for Cm(III), Bk(III), Cf(III), Es(III), and Fm(III) between aqueous perchlorate solutions and solutions of 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (BMPPT) and the synergist tri-n-octylphosphine oxide (TOPO) in toluene are reported. Curium-243, berkelium-250, californium-249, einsteinium-254, and fermium-253 were used in these studies. The K{sub d} for {sup 241}Am was also measured and is in agreement with previou… more
Date: November 1, 1991
Creator: Hannink, N. J.; Hoffman, D. C. & Smith, B. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Biology of the transuranium elements: an indexed bibliography

Description: This bibliography on the biology of the transuranium elements is a revision of one issued in 1973 (BNWL-1782). It includes essentially all of the citations from the earlier document, a few corrections and additions from the older literature, plus the new literature to mid-1975. It also includes a subject-matter index not present in the original document.
Date: July 1, 1976
Creator: Thompson, R. C. (comp.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiological safety considerations in the design and operation of the ORNL Transuranium Research Laboratory (TRL)

Description: The Transuranium Research Laboratory (TRL) is the central facility at Oak Ridge National Laboratory (ORNL) for chemical and physical research involving transuranium elements. Transuranium Research Laboratory investigations are about equally divided between studies of inorganic and structural chemistry of the heavy elements and nuclear structure and properties of their isotopes. Elements studied include neptunium, plutonium, americium, curium, berkelium, californium, and einsteinium, each in mic… more
Date: January 1, 1976
Creator: Haynes, C. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Safety analysis report for packaging: neutron shipping cask, model 0. 5T

Description: The Safety Analysis Report for Packaging demonstrates that the neutron shipping cask can safely transport, in solid or powder form, all isotopes of uranium, plutonium, americium, curium, berkelium, californium, einsteinium, and fermium. The shipping cask and its contents are described. It also evaluates transport conditions, structural parameters (e.g., load resistance, pressure and impact effects, lifting and tiedown devices), and shielding. Finally, it discusses compliance with Chapter 0529 o… more
Date: June 11, 1976
Creator: Peterson, R. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Californium production at the transuranium processing plant. [Transuranium processing plant design, equipment, and facilities]

Description: The Transuranium Processing Plant (TRU) at ORNL, which is the production, storage, and distribution center for the ERDA heavy element research program, is described. About 0.5 percent of /sup 252/Cf is currently being produced. TRU is a hot-cell, chemical processing facility of advanced design. New concepts have been incorporated into the facility for absolute containment, remote operation, remote equipment installation, and remote maintenance. The facilities include a battery of nine heavily s… more
Date: January 1, 1976
Creator: King, L. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Studies of californium metal at high pressure by x-ray diffraction

Description: The behavior of the crystal structure of californium metal under various pressures up to 140 kbars has been studied by use of a diamond-anvil type of miniature x-ray diffraction camera. Ten-microgram samples were encapsulated in aluminum foil, which also served as an internal standard for pressure determination. The phase transitions in cerium metal were produced and identified as a test of the apparatus and technique. Californium metal samples in the low-density face-centered cubic form (a/sub… more
Date: January 1, 1977
Creator: Burns, J. H. & Peterson, J. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sorption of curium, berkelium, californium, and einsteinium on cation exchange resin from nitric acid solutions

Description: Plots of the distribution coefficients of curium, berkelium, einsteinium, and californium (+3 ions) adsorbed on Dowex 50-X8 resin from nitric acid solutions are U-shaped, while plots of einsteinium (+4 ions) distribution coefficients are similar to an exponential decay curve. The +3 ions exhibit a minimum sorption at a nitric acid concentration of 6 or 7 molar. (LK)
Date: January 1, 1976
Creator: Chilton, J. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Active Neutron Interrogation of Non-Radiological Materials with NMIS

Description: The Nuclear Materials Identification System (NMIS) at Oak Ridge National Laboratory (ORNL), although primarily designed for analyzing special nuclear material, is capable of identifying nonradiological materials with a wide range of measurement techniques. This report demonstrates four different measurement methods, complementary to fast-neutron imaging, which can be used for material identification: DT transmission, DT scattering, californium transmission, and active time-tagged gamma spectros… more
Date: February 1, 2012
Creator: Walker, Mark E & Mihalczo, John T
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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TOWARD AN IMPROVED UNDERSTANDING OF STRUCTURE AND MAGNETISM IN NEPTUNIUM AND PLUTONIUM PHOSPHONATES AND SULFONATES

Description: This grant supported the exploratory synthesis of new actinide materials with all of the actinides from thorium to californium with the exceptions of protactinium and berkelium. We developed detailed structure-property relationships that allowed for the identification of novel materials with selective ion-exchange, selective oxidation, and long-range magnetic ordering. We found novel bonding motifs and identified periodic trends across the actinide series. We identified structural building unit… more
Date: March 1, 2012
Creator: Albrecht-Schmitt, Thomas
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
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Accurate determination of Curium and Californium isotopic ratios by inductively coupled plasma quadrupole mass spectrometry (ICP-QMS) in 248Cm samples for transmutation studies

Description: The French Atomic Energy Commission has carried out several experiments including the mini-INCA (INcineration of Actinides) project for the study of minor-actinide transmutation processes in high intensity thermal neutron fluxes, in view of proposing solutions to reduce the radiotoxicity of long-lived nuclear wastes. In this context, a Cm sample enriched in {sup 248}Cm ({approx}97 %) was irradiated in thermal neutron flux at the High Flux Reactor (HFR) of the Laue-Langevin Institute (ILL). This… more
Date: February 1, 2011
Creator: Gourgiotis, A.; Isnard, H.; Aubert, M.; Dupont, E.; AlMahamid, I.; Cassette, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Benchmark Analysis of Subcritical Noise Measurements on a Nickel-Reflected Plutonium Metal Sphere

Description: Subcritical experiments using californium source-driven noise analysis (CSDNA) and Feynman variance-to-mean methods were performed with an alpha-phase plutonium sphere reflected by nickel shells, up to a maximum thickness of 7.62 cm. Both methods provide means of determining the subcritical multiplication of a system containing nuclear material. A benchmark analysis of the experiments was performed for inclusion in the 2010 edition of the International Handbook of Evaluated Criticality Safety B… more
Date: September 1, 2009
Creator: Bess, John D. & Hutchinson, Jesson
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An Account of Oak Ridge National Laboratory's Thirteen Research Reactors

Description: The Oak Ridge National Laboratory has built and operated 13 nuclear reactors in its 66-year history. The first was the graphite reactor, the world's first operational nuclear reactor, which served as a plutonium production pilot plant during World War II. It was followed by two aqueous-homogeneous reactors and two red-hot molten-salt reactors that were parts of power-reactor development programs and by eight others designed for research and radioisotope production. One of the eight was an all-m… more
Date: August 1, 2009
Creator: Rosenthal, Murray Wilford
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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PROCEEDINGS OF THE SYMPOSIUM COMMEMORATING THE 25th ANNIVERSARY OF ELEMENTS 97 and 98 HELD ON JAN. 20, 1975

Description: This volume includes the talks given on January 20, 1975, at a symposium in Berkeley on the occasion of the celebration of the 25th anniversary of the discovery of berkelium and californium. Talks were given at this symposium by the four people involved in the discovery of these elements and by a number of people who have made significant contributions in the intervening years to the investigation of their nuclear and chemical properties. The papers are being published here, without editing, in… more
Date: July 1, 1976
Creator: Seaborg, Glenn T.; Street Jr., Kenneth; Thompson, Stanley G. & Ghiorso, Albert
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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