Download or read book Natural Alpha Radioactivity in Medium heavy Elements thesis written by Ronald D. Macfarlane and published by . This book was released on 1959 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alpha Radioactivity in the Medium Heavy Elements written by John Oscar Rasmussen and published by . This book was released on 1951 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Binding Energies of Alpha Particles in Medium heavy Elements written by Truman Paul Kohman and published by . This book was released on 1948 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Systematics of Alpha Radioactivity written by and published by . This book was released on 1949 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Correlations of alpha-decay energies in terms of mass number and atomic number have been made for all of the alpha-emitting species now numbering over 100. For each element isotopes show increase in alpha-energy with decrease in mass number except in the region of 126 neutrons where there is an explainable reversal. This reversal has the effect of creating a region of relatively low alpha-energy and long half-life at low mass numbers for such elements as astatine, emanation, francium, and possibly higher elements as had been noted already for bismuth and polonium. Methods and examples of using alpha-decay data to define the energy surface in the heavy element region are discussed. The regularities in alpha-decay are used for predictions of nuclear properties including prediction of the beta-stable nuclides among the heavy elements. The half-life vs. energy correlations show that the even-even nuclides conform well with existing alpha-decay theory, but all nuclear types with odd nucleons show prohibited decay. The reason for this prohibition is not found in spin changes in the alpha-emission but in the assembly of the components of the alpha particle, and this theory is discussed further in terms of observations made on nuclides having two or more alpha-groups. Using most of the even-even nuclei to define 'normal nuclear radius' calculations are now able to show the shrinkage in the regions of lead and of 126 neutrons to amount to about 10%. The much greater change in 'effective radius' for bismuth isotopes can be dissociated into the effects of odd nucleons superimposed on the actual decrease in nuclear radius. The simple expression r = 1.48 A13 · 10−13 cm seems to fit the data for the even-even nuclei outside of the region of 126 neutrons better than more complex functions.

Download or read book The Complex Alpha Spectra of the Heavy Elements written by Francesco Asaro and published by . This book was released on 1953 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alpha Decay Studies in the Heavy Element Region written by John Philip Hummel and published by . This book was released on 1956 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Long Range Alpha Particle Emission in the Fission of Heavy Elements written by and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Alpha Radioactivity of Nuclides with Atomic Numbers Less Than 83 written by John Oscar Rasmussen and published by . This book was released on 1951 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Systematics of Alpha radioactivity written by Isadore Perlman and published by . This book was released on 1949 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Helium written by Philip Cochran Tully and published by . This book was released on 1970 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1961 with total page 1248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Information Circular written by and published by . This book was released on 1970 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Silver Potential and Economic Aspects of the Leadville District Lake County Colo written by Henry C. Meeves and published by . This book was released on 1970 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Physics written by S N Ghoshal and published by S. Chand Publishing. This book was released on 2014 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed as a textbook for the undergraduate and postgraduate students of Physics, this well-written text discusses the principles and concepts of Nuclear Physics in a simple and an easy-to-understand language. Divided into nineteen chapters, the book discusses the structure and properties of atomic nucleus, radioactivity, nuclear radiations, nuclear models, nuclear reactions and accelerators of charged particles. Furthermore, it deals with neutrons and neutron physics, nuclear fission and fusion, use of nuclear energy and transuranic and other artificially produced elements. The book concludes with the discussions on nuclear forces and two-body problem, elementary particles and cosmic rays. Table Of Contents

Download or read book A Note on the Dosimetric Interpretation of Rigidity Spectra for Solar Particle Beams written by Hermann J. Schaefer and published by . This book was released on 1966 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: By using the experimental rigidity formulation as proposed by Freier and Webber, the particle fluxes of all flare events of the past solar cycle can be uniformly described in terms of a flux constant J sub o and a rigidity constant P sub o. On the basis of these data, three fictitious rigidity spectra are 'synthesized' covering the full variability range of all flare events, yet characterizing more systematically the relationships between the basic dosimetric quantities and the rigidity constant P sub o. It is found that, of the components heavier than protons, only alpha particles contribute substantially to total exposure. The fractional alpha dose in the tissue surface behind 0.1 g/sq cm shielding grows from 40 percent for P sub o = 50 Mv to 400 per cent for P sub o = 300 Mv. At the same time, the depth dose of the alpha component shows an extremely steep drop which would require microsensors for accurate measurement. For the alpha and medium heavy components, the RBE shows a pronounced transition in near surface regions which further steepens the drop of the RBE dose equivalents as compared to the rad doses. The extremely strong and nonlinear dependence of the rad and rem dose distribution on rigidity makes the rigidity concept practically useless for any dosimetric evaluation and indicates the need for direct measurements of local rad and rem doses on the astronaut's body. (Author).