Download or read book Isotopes of the New Element Americium atomic Number 95 written by Leon Owen Morgan and published by . This book was released on 1947 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The New Element Americium atomic Number 95 written by Glenn Theodore Seaborg and published by . This book was released on 1948 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Isotopes of the New Element Curium Atomic Number 96 written by Ralph Arthur James and published by . This book was released on 1949 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The New Element Americium Atomic Number 95 written by and published by . This book was released on 1948 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The New Element Berkelium atomic Number 97 written by Stanley Gerald Thompson and published by . This book was released on 1950 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: An isotope of the element with atomic number 97 has been discovered as a product of the helium-ion bombardment of americium. This isotope decays with the emission of alpha-particles of maximum energy 6.72 Mev (30 percent) and it emits lower energy alpha-particles of energies 6.55 Mev (53 percent) and 6.20 Mev (17 percent). The half-life of this isotope is 4.6 hours and it decays primarily by electron capture with about 0.1 percent branching decay by alpha-particle emission. The mass number is probably 243 as indicated by chemical separation of the alpha-particle and electron-capture daughters. The name berkelium, symbol Bk, is proposed for element 97. The chemical separation of element 97 from the target material and other reaction products was made by combinations of precipitation and ion exchange adsorption methods making use of its anticipated (III) and (IV) oxidation states and its position as a member of the actinide transition series. The distinctive chemical properties made use of in its separation and the equally distinctive decay properties of the particular isotope constitute the principal evidence for the new element.
Download or read book Nature s Building Blocks written by John Emsley and published by Oxford University Press, USA. This book was released on 2003 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: A readable, informative, fascinating entry on each one of the 100-odd chemical elements, arranged alphabetically from actinium to zirconium. Each entry comprises an explanation of where the element's name comes from, followed by Body element (the role it plays in living things), Element ofhistory (how and when it was discovered), Economic element (what it is used for), Environmental element (where it occurs, how much), Chemical element (facts, figures and narrative), and Element of surprise (an amazing, little-known fact about it). A wonderful 'dipping into' source for the familyreference shelf and for students.
Download or read book Health Risks of Radon and Other Internally Deposited Alpha Emitters written by National Research Council and published by National Academies Press. This book was released on 1988-02-01 with total page 623 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes hazards from radon progeny and other alpha-emitters that humans may inhale or ingest from their environment. In their analysis, the authors summarize in one document clinical and epidemiological evidence, the results of animal studies, research on alpha-particle damage at the cellular level, metabolic pathways for internal alpha-emitters, dosimetry and microdosimetry of radionuclides deposited in specific tissues, and the chemical toxicity of some low-specific-activity alpha-emitters. Techniques for estimating the risks to humans posed by radon and other internally deposited alpha-emitters are offered, along with a discussion of formulas, models, methods, and the level of uncertainty inherent in the risk estimates.
Download or read book Americium 241 written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Used extensively in nuclear gauges and in many other areas, this man-made element (Atomic Number 95) was first isolated in weighable amounts during World War II. Americium is now a very useful by-product of the nuclear industry and is produced in kilogram amounts by appropriate recovery, separation and purification processes. A review will be presented of its discovery, nuclear and chemical properties, and uses, with emphasis on its production process and separations chemistry.
Download or read book Modern Alchemy written by Glenn Theodore Seaborg and published by World Scientific. This book was released on 1994 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: During his distinguished career spanning more than 50 years, Nobel laureate (Chemistry) Glenn T Seaborg published over 500 works. This volume puts together about 100 of his selected papers. The papers are divided into five categories. Category I consists of papers which detail the discovery of 10 transuranium elements and numerous heavy isotopes of special importance. Category II papers describe the discovery of a number of isotopes which became the workhorses of nuclear medicine or found other applications. Papers in Category III describe how the chemical properties of transuranium elements were originally determined, how chemistry is applied in nuclear sciences, and other chemical investigations, including early work done with the great chemist G N Lewis. Papers in Category IV cover radioactive decay chains and nuclear systematics. Lastly, papers in Category V illustrate how the powerful methods of chemistry are used to explain nuclear reactions in low, intermediate and high energy nuclear physics.
Download or read book The New Element Californium atomic Number 98 written by and published by . This book was released on 1950 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Definite identification has been made of an isotope of the element with atomic number 98 through the irradiation of Cm242 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 98244 is through the emission of alpha-particles, with energy of about 7.1 Mev, which agrees with predictions. Other considerations involving the systematics of radioactivity in this region indicate that it should also be unstable toward decay by electron capture. The chemical separation and identification of the new element was accomplished through the use of ion exchange adsorption methods employing the resin Dowex-50. The element 98 isotope appears in the eka-dysprosium position on elution curves containing berkelium and curium as reference points--that is, it precedes berkelium and curium off the column in like manner that dysprosium precedes terbium and gadolinium. The experiments so far have revealed only the tripositive oxidation state of eka-dysprosium character and suggest either that higher oxidation states are not stable in aqueous solutions or that the rates of oxidation are slow. The successful identification of so small an amount of an isotope of element 98 was possible only through having made accurate predictions of the chemical and radioactive properties.
Download or read book Isotopic Power Sources written by and published by . This book was released on 1961 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Public Works for Water and Power Development and Atomic Energy Commission Appropriations for Fiscal Year 1972 written by United States. Congress. Senate. Committee on Appropriations and published by . This book was released on 1971 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Public Works for Water Pollution Control and Power Development and Atomic Energy Commission Appropriation Bill 1971 Atomic Energy Commission Tennessee Valley Authority written by United States. Congress. House. Committee on Appropriations. Subcommittee on Public Works and published by . This book was released on 1970 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AEC Authorizing Legislation Fiscal Year 1973 written by United States. Congress. Joint Committee on Atomic Energy and published by . This book was released on 1972 with total page 1072 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hearings and Reports on Atomic Energy written by United States. Congress. Joint Committee on Atomic Energy and published by . This book was released on 1946 with total page 1222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AEC Authorizing Legislation Fiscal Year 1972 written by United States. Congress. Joint Committee on Atomic Energy and published by . This book was released on 1971 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Documents Released by the United States Atomic Energy Commission to January 1 1950 written by U.S. Atomic Energy Commission and published by . This book was released on 1950 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
